CN115651204B - N-carbonyl-bisamide-polyolefin compound, and preparation method and application thereof - Google Patents
N-carbonyl-bisamide-polyolefin compound, and preparation method and application thereof Download PDFInfo
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Abstract
The invention provides an N-carbonyl-bisamide-polyolefin compound, a preparation method and application thereof, and particularly relates to the technical field of high polymer materials. The N-carbonyl-bisamide-polyolefin compound is mainly obtained by reacting polyolefin resin, a polar monomer, a chain extender and a polar elastomer. According to the parts by weight, the polyolefin resin is 80-120 parts, the polar monomer is 1-5 parts, the chain extender is 2-6 parts, and the polar elastomer is 80-120 parts. The N-carbonyl-bisamide-polyolefin compound polyolefin structure provided by the invention physically winds with a polyolefin substrate of the wood-plastic composite material, and simultaneously, polar groups on a molecular chain of the N-carbonyl-bisamide-polyolefin compound chemically react with hydroxyl groups in wood powder, so that the aggregation phenomenon of the wood powder is reduced, the dispersion effect of the wood powder is improved, the mechanical property of the wood-plastic composite material is improved, and the water absorption rate is reduced.
Description
Technical Field
The invention relates to the technical field of high polymer materials, in particular to an N-carbonyl-bisamide-polyolefin compound, a preparation method, a wood-plastic compatilizer and application.
Background
The wood-plastic composite material contains a large amount of hydroxyl, has strong polarity and strong water absorption, and the polyolefin is generally nonpolar and has good hydrophobicity. Therefore, during processing, a compatibilizer is required to be added to improve the interfacial compatibility between the two components and improve the product performance.
At present, the wood plastic material mainly uses a polyolefin compatilizer to improve the dispersibility of wood flour. The polyolefin compatilizer mainly refers to a polyolefin modifier grafted by a strong polar monomer, wherein the grafted monomer comprises maleic anhydride, acrylic acid, methyl methacrylate, glycidyl methacrylate and the like, can react with hydroxyl groups in fibers so as to reduce the polarity and the water absorption of the fibers, and also comprises a nonpolar chain segment which is better compatible with matrix resin and plays a role similar to a bridge, so that the plant fibers and the polyolefin resin are effectively bonded together, and the product performance is improved. At present, polyolefin compatilizers are the mainstream of wood plastic compatilizers.
In the prior art, the polyolefin compatilizer can improve the dispersibility of the wood flour, but the wood flour is easy to aggregate due to intermolecular hydrogen bonds because of rich hydroxyl groups on the surface of the wood flour, the polyolefin compatilizer has limited grafting rate and low effective content of surface polar groups, cannot shield the intermolecular hydrogen bond action among the wood flour, and has poor dispersing effect.
In view of the above, the present invention is particularly proposed.
Disclosure of Invention
One of the objectives of the present invention is to provide an N-carbonyl-bisamide-polyolefin compound to alleviate the technical problems of the prior art that the polyolefin compatibilizer cannot shield the intermolecular hydrogen bonding between wood powders and the dispersion effect is poor.
In order to solve the technical problems, the invention adopts the following technical scheme:
in a first aspect, the present invention provides an N-carbonyl-bisamide-based polyolefin compound having a structure represented by formula i:
formula I
In the formula I, R 1 、R 2 And R 3 Each independently selected from hydrogen, halogen, hydroxyl, carboxyl and C 1 -C 12 Substituted or unsubstituted alkyl;
n is not less than 4 and n is an integer.
Alternatively, R 1 And R 3 Each independently selected from hydrogen, C 1 -C 8 Substituted or unsubstituted alkyl;
preferably, R 2 Selected from hydrogen, halogen, hydroxyl, carboxyl, C1-C4 substituted or unsubstituted alkyl;
preferably, 4. Ltoreq. N.ltoreq.8 and n is an integer.
The second aspect of the present invention provides that the N-carbonyl-bisamide-polyolefin compound is mainly obtained by reacting a polyolefin resin, a polar monomer, a chain extender, and a polar elastomer.
Optionally, the polyolefin resin is 80-120 parts, the polar monomer is 1-5 parts, the chain extender is 2-6 parts, and the polar elastomer is 80-120 parts by weight.
Optionally, the composition further comprises 0.1-1 part of an initiator and 0.5-5 parts of an antioxidant in parts by weight.
The initiator comprises at least one of dibenzoyl peroxide, 2,5-dimethyl-2,5-di (t-butylperoxy) hexane, di-t-butyl peroxide, dicumyl peroxide and di-t-butylperoxycumene.
The antioxidant comprises at least one of hindered phenol antioxidant, thioester antioxidant and phosphite antioxidant.
Optionally, the polyolefin resin comprises at least one of polyethylene, polypropylene, and ethylene-propylene copolymer.
The polar monomer comprises at least one of maleic anhydride, itaconic acid, glycidyl methacrylate and acrylic acid.
The chain extender includes a diamine compound.
Preferably, the diamine compound includes at least one of pentanediamine, butanediamine, hexanediamine, heptanediamine, and octanediamine.
The polar elastomer includes an ethylene-acrylic acid copolymer.
Preferably, the acrylic acid content is greater than or equal to 10%.
Optionally, uniformly mixing and melt blending the polyolefin resin, the polar monomer, the optional initiator and the optional antioxidant to obtain a modified polyolefin resin; and then adding the modified polyolefin resin and the chain extender into a double-screw extruder through a main feeding material, adding a polar elastomer into a side feeding material, and carrying out melt blending, granulation, cooling and drying on the mixture to obtain the N-carbonyl-bisamide-polyolefin compound.
Alternatively, the twin screw extruder comprises 13 temperature zones, the temperature of each temperature zone is 70-90 ℃, 110-130 ℃, 160-180 ℃, 180-200 ℃ 180-200 ℃, 170-190 ℃, 180-200 ℃ and 180-200 ℃.
The side feeding is carried out in zone 9.
Preferably, the twin-screw extruder has a length to diameter ratio of 40 or more, preferably 56 or more.
In a third aspect of the present invention, there is provided a wood plastic compatibilizer comprising the N-carbonyl-bisamide-based polyolefin compound.
The fourth aspect of the invention provides the application of the wood-plastic compatilizer in the preparation of wood-plastic composite materials.
Compared with the prior art, the invention has at least the following beneficial effects:
the N-carbonyl-bisamide-polyolefin compound provided by the invention is a polar compound with a main chain containing bisamide groups and a side chain containing a polycarbonyl structure. The polyolefin molecular chains are connected into a long chain through bisamide bonds, and meanwhile, the side chain contains a multi-carbonyl structure, and the multi-carbonyl structure provides good polarity for the N-carbonyl-bisamide-polyolefin compound.
The preparation method of the N-carbonyl-bisamide-polyolefin compound provided by the invention is simple to operate, wide in source of preparation raw materials, stable in product quality and suitable for large-scale industrial production.
The structure of the double polyolefin on the wood-plastic compatilizer provided by the invention is physically wound with the polyolefin substrate of the wood-plastic composite material, and meanwhile, the polar groups on the molecular chain of the wood-plastic compatilizer chemically react with the hydroxyl groups in the wood powder, so that the aggregation phenomenon of the wood powder is reduced, the dispersion effect of the wood powder is improved, the mechanical property of the wood-plastic composite material is improved, and the water absorption rate is reduced.
The application provided by the invention provides a better wood-plastic compatilizer for the wood-plastic composite material, improves the bonding property between the wood-plastic composite material and metal, expands the application market of the wood-plastic composite material and promotes the development of the wood-plastic composite material.
Detailed Description
In order to make the objects, technical solutions and advantages of the present invention clearer, the technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the embodiments of the present invention. The components of embodiments of the present invention may be arranged and designed in a wide variety of different configurations.
In a first aspect, the present invention provides an N-carbonyl-bisamide-based polyolefin compound having a structure represented by formula i:
formula I
In the formula I, R 1 、R 2 And R 3 Each independently selected from hydrogen, halogen, hydroxyl, carboxyl and C 1 -C 12 Substituted or unsubstituted alkyl.
In some embodiments of the invention, C is 1 -C 12 Substituted or unsubstituted alkyl includes, but is not limited to, C 1 、C 2 、C 3 、C 4 、C 5 、C 6 、C 7 、C 8 、C 9 、C 10 、C 11 Or C 12 Substituted or unsubstituted alkyl groups.
n is not less than 4 and n is an integer.
The N-carbonyl-bisamide-polyolefin compound provided by the invention is a polar compound with a main chain containing bisamide groups and a side chain containing a polycarbonyl structure. The polyolefin molecular chains are connected into a long chain through bisamide bonds, and meanwhile, the side chain contains a multi-carbonyl structure, and the multi-carbonyl structure provides good polarity for the N-carbonyl-bisamide-polyolefin compound.
Alternatively, R 1 And R 3 Each independently selected from hydrogen, C 1 -C 8 Substituted or unsubstituted alkyl.
Preferably, R 2 Selected from hydrogen, halogen, hydroxyRadical, carboxyl radical, C 1 -C 4 Substituted or unsubstituted alkyl.
In some embodiments of the invention, C 1 -C 4 Substituted or unsubstituted alkyl includes, but is not limited to, C 1 、C 2 、C 3 Or C 4 Substituted or unsubstituted alkyl groups.
In some preferred embodiments of the invention, alkyl is typically, but not limited to, methyl, methylene, ethyl, ethylene, n-propyl, isopropyl, n-butyl, isobutyl, sec-butyl, tert-butyl, n-pentyl, n-hexyl, n-heptyl, n-octyl, n-nonyl, n-decyl, cyclopentyl, or cyclohexyl.
In some preferred embodiments of the invention, R 2 One selected from hydrogen, halogen, hydroxyl, carboxyl, methyl, ethyl, propyl, n-butyl and isobutyl.
Preferably, 4. Ltoreq. N.ltoreq.8 and n is an integer.
In some embodiments of the invention, n is typically, but not limited to, 4, 5, 6, 7 or 8.
The second aspect of the present invention provides that the N-carbonyl-bisamide-based polyolefin compound is mainly obtained by reacting a polyolefin resin, a polar monomer, a chain extender, and a polar elastomer.
The preparation method of the N-carbonyl-bisamide-polyolefin compound comprises the steps of reacting polyolefin resin with a polar monomer to obtain a polyolefin graft, reacting the polyolefin graft with a chain extender to obtain a primary product, and reacting the primary product with a polar elastomer to obtain the N-carbonyl-bisamide-polyolefin compound, wherein the reaction formula is shown as a reaction formula (1). The preparation method is simple to operate, wide in source of preparation raw materials, stable in product quality and suitable for large-scale industrial production.
Reaction formula (1)
The preparation method of the compound provided by the invention is simple to operate, wide in source of preparation raw materials, stable in product quality and suitable for large-scale industrial production.
Optionally, the polyolefin resin is 80-120 parts, the polar monomer is 1-5 parts, the chain extender is 2-6 parts, and the polar elastomer is 80-120 parts by weight.
In some embodiments of the invention, the weight parts of the polyolefin resin are typically, but not limited to, 80 parts, 85 parts, 90 parts, 95 parts, 100 parts, 105 parts, 110 parts, 115 parts, or 120 parts; the parts by weight of polar monomer is typically, but not limited to, 1 part, 2 parts, 3 parts, 4 parts, or 5 parts; the weight fraction of chain extender is typically but not limited to 2, 3, 4, 5 or 6 parts; the weight parts of the polar elastomer are typically, but not limited to, 80 parts, 85 parts, 90 parts, 95 parts, 100 parts, 105 parts, 110 parts, 115 parts, or 120 parts.
Optionally, the composition further comprises 0.1-1 part of an initiator and 0.5-5 parts of an antioxidant in parts by weight.
In some embodiments of the present invention, the weight parts of the initiator are typically, but not limited to, 0.1 parts, 0.2 parts, 0.3 parts, 0.4 parts, 0.5 parts, 0.6 parts, 0.7 parts, 0.8 parts, 0.9 parts, or 1 part; the weight portion of the antioxidant is typically, but not limited to, 0.5 parts, 1 part, 1.5 parts, 2 parts, 2.5 parts, 3 parts, 3.5 parts, 4 parts, 4.5 parts, or 5 parts.
The initiator is decomposed into initiator free radicals under the heated condition, the macromolecules are initiated to generate monomer free radicals, and the monomer free radicals are subjected to grafting reaction. In the N-carbonyl-bisamide-based polyolefin compound of the present invention, when the weight part of the initiator is less than 0.1 part, the content of the polar group on the N-carbonyl-bisamide-based polyolefin compound decreases, and the grafting effect decreases; when the weight part of the initiator is more than 1 part, the polar monomer grafted on the polyolefin resin is saturated and cannot be grafted.
The initiator comprises at least one of dibenzoyl peroxide, 2,5-dimethyl-2,5-di (t-butylperoxy) hexane, di-t-butyl peroxide, dicumyl peroxide and di-t-butylperoxycumene.
The antioxidant comprises at least one of hindered phenol antioxidant, thioester antioxidant and phosphite antioxidant.
Optionally, the polyolefin resin comprises at least one of polyethylene, polypropylene, and ethylene-propylene copolymer.
The polar monomer includes at least one of maleic anhydride, itaconic acid, glycidyl methacrylate, and acrylic acid.
The chain extender includes a diamine compound.
Preferably, the diamine compound includes at least one of pentanediamine, butanediamine, hexanediamine, heptanediamine, and octanediamine.
The polar elastomer includes an ethylene-acrylic acid copolymer.
Preferably, the acrylic acid content is greater than or equal to 10%.
With the increase of the acrylic acid content in the ethylene-acrylic acid copolymer, the acrylic acid groups on the molecular chain of the N-carbonyl-bisamide-polyolefin compound are increased, and the polarity of the N-carbonyl-bisamide-polyolefin compound is improved. When the acrylic acid content is more than 10%, the polar elastomer can provide more acrylic acid groups to improve the properties of the N-carbonyl-bisamide-polyolefin compound.
Optionally, uniformly mixing and melt blending the polyolefin resin, the polar monomer, the optional initiator and the optional antioxidant to obtain a modified polyolefin resin; and then adding the modified polyolefin resin and the chain extender into a double-screw extruder through a main feeding material, adding a polar elastomer into a side feeding material, and carrying out melt blending, granulation, cooling and drying on the mixture to obtain the N-carbonyl-bisamide-polyolefin compound.
Alternatively, the twin screw extruder comprises 13 temperature zones, the temperature of each temperature zone is 70-90 ℃, 110-130 ℃, 160-180 ℃, 180-200 ℃ 180-200 ℃, 170-190 ℃, 180-200 ℃ and 180-200 ℃.
The side feeding is carried out in zone 9.
Preferably, the twin-screw extruder has a length to diameter ratio of 40 or more, preferably 56 or more.
The length-diameter ratio of the double-screw extruder is more than or equal to 40, preferably more than or equal to 56, namely a screw with a large length-diameter ratio, for example, the diameter of the screw is 65mm, the total length of the screw is 3640mm, and the lengths of the zones are different when different numbers of temperature zones are arranged. The large length-diameter ratio screw is beneficial to material mixing and plasticizing, and can improve melt pressure and reduce countercurrent and leakage loss. In addition, the polar elastomer side feed is added in the 9 th zone, and the grafting reaction zone with the polar elastomer is shortened when the polar elastomer side feed is added in front, so that grafting is not facilitated; the blending interval is shortened by adding the mixture later, which is not beneficial to the subsequent blending effect.
In a third aspect of the present invention, there is provided a wood plastic compatibilizer comprising the N-carbonyl-bisamide-based polyolefin compound.
The structure of the double polyolefin on the wood-plastic compatilizer provided by the invention is physically wound with the polyolefin substrate of the wood-plastic composite material, and meanwhile, the polar groups on the molecular chain of the wood-plastic compatilizer are subjected to chemical reaction with the hydroxyl in the wood powder, so that the aggregation phenomenon of the wood powder is reduced, the dispersion effect of the wood powder is improved, the mechanical property of the wood-plastic composite material is improved, and the water absorption rate is reduced.
The fourth aspect of the invention provides the application of the wood-plastic compatilizer in the preparation of wood-plastic composite materials.
The application provided by the invention provides a better wood-plastic compatilizer for the wood-plastic composite material, improves the bonding property between the wood-plastic composite material and metal, expands the application market of the wood-plastic composite material and promotes the development of the wood-plastic composite material.
Some embodiments of the present invention will be described in detail below with reference to examples. The embodiments and features of the embodiments described below can be combined with each other without conflict. The raw material suppliers in the following examples and comparative examples are shown in Table 1 below, and all the raw materials not listed in Table 1 were obtained by commercial purchase.
Table 1 raw material specification table
| Raw materials | Specification of | Manufacturer of the product |
| Polyolefin resin | LH5564 | Table concentrator |
| Polar elastomer | EAA 5200 ， EAA 5100 ， EAA 5980 | Exxon Mobil |
Example 1
This example provides an N-carbonyl-bisamide-based polyolefin compound prepared by the following steps:
(1) Weighing 100kg of polyolefin resin (Taiwan poly LH 5564), 0.15kg of initiator (dicumyl peroxide DCP), 1.5 kg of polar monomer (maleic anhydride MAH), and 0.5 kg of antioxidant (a blend of antioxidant 168 and antioxidant 1010 in a mass ratio of 2:3), uniformly mixing in a high-speed mixer, adding into a double-screw extruder, and carrying out melt extrusion, granulation, cooling and drying to obtain the modified polyolefin resin (HDPE-g-MAH).
(2) Weighing modified polyolefin resin (HDPE-g-MAH) 100kg, chain extender (hexamethylene diamine) 2 kg and polar elastomer (Exxon Mobil EAA 5200) 100kg, mixing the modified polyolefin resin and the chain extender, adding the mixture into a double-screw extruder with the length-diameter ratio of 56 through a main feeding, the temperatures of zones 1 to 13 of the extruder were set at 80 ℃, 120 ℃, 170 ℃, 190 ℃, 180 ℃, 190 ℃, 180 ℃ and 180 ℃ with a head at 180 ℃, and side feeding was set at a ninth zone, and the polar elastomer EAA 5200 (acrylic acid content of 15%) was added. And (3) granulating the extrudate under water, cooling, centrifugally dewatering, and drying by blowing to obtain the final N-carbonyl-bisamide-polyolefin compound.
The structural formula of the N-carbonyl-bisamide-polyolefin compound is shown as the following formula V.
Formula V
Example 2
This example provides an N-carbonyl-bisamide-based polyolefin compound, which is different from example 1 in that the amount of the chain extender (hexamethylenediamine) is 4 kg, and the rest of the raw materials and the method are the same as those in example 1 and will not be described herein again.
Example 3
This example provides an N-carbonyl-bisamide-based polyolefin compound, which is different from example 1 in that the amount of the chain extender (hexamethylenediamine) is 6 kg, and the remaining raw materials and methods are the same as example 1 and are not described herein again.
Example 4
This example provides an N-carbonyl-bisamide-based polyolefin compound, which is different from example 1 in that the amount of the chain extender (pentamethylenediamine) is 4 kg, and the rest of the raw materials and methods are the same as those in example 1 and will not be described herein again.
Example 5
This example provides an N-carbonyl-bisamide-based polyolefin compound, which is different from example 1 in that the amount of the chain extender (octanediamine) is 4 kg, and the rest of the raw materials and the method are the same as example 1 and will not be described herein again.
Example 6
This example provides an N-carbonyl-bisamide-based polyolefin compound, which is different from example 2 in that the modified polyolefin resin (HDPE-g-MAH) was used in an amount of 80kg and the polar elastomer (Exxon Mobil EAA 5200) was used in an amount of 120kg, and the remaining raw materials and processes were the same as in example 2 and will not be described again.
Example 7
This example provides an N-carbonyl-bisamide-based polyolefin compound, which is different from example 2 in that the modified polyolefin resin (HDPE-g-MAH) was used in an amount of 120kg and the polar elastomer (Exxon Mobil EAA 5200) was used in an amount of 80kg, and the remaining raw materials and processes were the same as in example 2 and will not be described again.
Example 8
This example provides an N-carbonyl-bisamide-based polyolefin compound, which is different from example 2 in that the polar elastomer is Exxon Mobil EAA 5100 (acrylic acid content: 11%) in an amount of 100kg, and the remaining raw materials and processes are the same as example 2 and will not be described again.
Example 9
This example provides an N-carbonyl-bisamide-based polyolefin compound, which is different from example 2 in that the polar elastomer is Exxon Mobil EAA 5980 (acrylic acid content: 20%) and used in an amount of 100kg, and the remaining raw materials and processes are the same as in example 2 and will not be described again.
Comparative example 1
This comparative example provides a compound, which differs from example 1 in that no chain extender is used and the remaining raw materials and processes are the same as in example 1 and are not described again here.
Test example 1
The compounds obtained in the above examples 1 to 9 and comparative example 1 were added to a wood plastic composite as a wood plastic compatibilizer.
The formula of the wood-plastic composite material comprises: HDPE 8008 parts, virgin wood powder 60 parts, wood-plastic compatilizer 5 parts, stabilizer 0.5 part, and processing aid 1 part.
The preparation process of the wood-plastic composite material comprises the following steps: adding the raw materials into an internal mixer, internally mixing for 10min at 170 ℃, feeding, crushing, adding into a double-screw extruder, and directly extruding and molding through a sheet-shaped die to obtain the wood-plastic composite material.
The performance test of the wood-plastic composite material comprises the following steps of testing the bending strength, the bending modulus, the poaching water absorption rate and the poaching thickness expansion rate:
flexural strength was performed according to ISO 178;
flexural modulus was performed according to ISO 178;
the boiling water absorption rate is carried out according to the regulation in GB/T17657;
the boiled thickness overrun test was carried out according to the regulations in GB/T17657.
The results are shown in Table 2.
TABLE 2
| Performance of | Flexural Strength/MPa | Flexural modulus/MPa | Water boiling water absorption/%) | Poached thickness swell ratio/%) |
| Example 1 | 38.4 | 2910 | 7.42 | 5.24 |
| Example 2 | 40.5 | 3100 | 5.12 | 3.21 |
| Example 3 | 41.2 | 3210 | 5.68 | 3.72 |
| Example 4 | 40.8 | 3050 | 5.25 | 3.18 |
| Example 5 | 39.6 | 3090 | 4.98 | 3.42 |
| Example 6 | 39.6 | 3250 | 7.12 | 4.03 |
| Example 7 | 38.6 | 2950 | 6.42 | 4.18 |
| Example 8 | 36.2 | 2830 | 5.86 | 4.1 |
| Example 9 | 37.2 | 2860 | 6.86 | 4.21 |
| Comparative example 1 | 30.4 | 2450 | 11.5 | 8.32 |
As can be seen from the results in Table 2, the data show that the chain extender is not added in the comparative example 1, the polyolefin chain segment and the polar elastomer in the compound are only simply blended, a macromolecular structure cannot be effectively formed, and all properties of the wood-plastic composite material are low; in example 1~3, with the increase of chain extenders, polyolefin chain segments and polar elastomers are linked through the chain extenders to form a macromolecular structure, which not only physically twines with the wood-plastic base material, but also generates chemical reaction or intermolecular hydrogen bonds between polar groups and surface hydroxyls of wood powder, and can effectively reduce aggregation among the wood powder, improve dispersion of the wood powder in a plastic body, improve mechanical properties, and reduce water absorption; as the content of the chain extender is continuously increased, the risk of internal crosslinking exists, the gel phenomenon is generated, and the dispersion of the wood-plastic compatilizer is not facilitated; the chain-increasing effect of different chain extenders on the wood-plastic compatilizer is equivalent, and the performance of the wood-plastic composite material is relatively close.
Examples 4 to 7 show that, when the polyolefin segment in the system is higher, the polarity of the N-carbonyl-bisamide-based polyolefin compound is decreased, the anti-agglomeration effect on wood flour is decreased, and the overall properties are decreased; when the proportion of the polar chain segment in the system is increased, the N-carbonyl-bisamide-polyolefin compound has a certain crosslinking risk, and meanwhile, the compatibility with the wood-plastic base material is weakened, and the phenomenon is easy to occur when the content of the polar group in the polar elastomer is increased, and the lower polar group cannot uniformly disperse wood powder due to lower polarity, so that the comprehensive performance is reduced, and the water absorption rate is increased.
Finally, it should be noted that: the above embodiments are only used to illustrate the technical solution of the present invention, and not to limit the same; while the invention has been described in detail and with reference to the foregoing embodiments, it will be understood by those skilled in the art that: the technical solutions described in the foregoing embodiments may still be modified, or some or all of the technical features may be equivalently replaced; and the modifications or the substitutions do not make the essence of the corresponding technical solutions depart from the scope of the technical solutions of the embodiments of the present invention.
Claims (8)
1. An N-carbonyl-bisamide-polyolefin compound is characterized by being mainly obtained by reacting polyolefin resin, a polar monomer, a chain extender and a polar elastomer;
the polar monomer comprises at least one of maleic anhydride, itaconic acid, glycidyl methacrylate and acrylic acid;
the chain extender comprises a diamine compound comprising at least one of butanediamine, pentanediamine, hexanediamine, heptanediamine, and octanediamine;
the polar elastomer comprises an ethylene-acrylic acid copolymer;
the polyolefin resin is firstly reacted with a polar monomer to obtain a polyolefin graft, the polyolefin graft is reacted with a chain extender to obtain a primary product, and the primary product is then reacted with a polar elastomer to obtain the N-carbonyl-bisamide-polyolefin compound.
2. The N-carbonyl-bisamide-polyolefin compound according to claim 1, wherein the polyolefin resin is 80 to 120 parts, the polar monomer is 1 to 5 parts, the chain extender is 2 to 6 parts, and the polar elastomer is 80 to 120 parts by weight.
3. The N-carbonyl-bisamide-based polyolefin compound according to claim 1, further comprising 0.1 to 1 part by weight of an initiator, 0.5 to 5 parts by weight of an antioxidant;
the initiator comprises at least one of dibenzoyl peroxide, 2,5-dimethyl-2,5-di (t-butylperoxy) hexane, di-t-butyl peroxide, dicumyl peroxide and di-t-butylperoxycumene;
the antioxidant comprises at least one of hindered phenol antioxidant, thioester antioxidant and phosphite antioxidant.
4. The N-carbonyl-bisamide-based polyolefin compound according to claim 1, wherein the polyolefin resin comprises at least one of polyethylene, polypropylene, and an ethylene-propylene copolymer.
5. The N-carbonyl-bisamide-based-polyolefin compound according to claim 1, wherein the polyolefin resin, the polar monomer, the optional initiator, and the optional antioxidant are uniformly mixed and melt-blended to obtain a modified polyolefin resin; and then adding the modified polyolefin resin and the chain extender into a double-screw extruder through a main feeding material, adding a polar elastomer into a side feeding material, and carrying out melt blending, granulation, cooling and drying on the mixture to obtain the N-carbonyl-bisamide-polyolefin compound.
6. The N-carbonyl-bisamide-based-polyolefin compound according to claim 5, wherein the twin screw extruder comprises 13 temperature zones, the temperature of each temperature zone is 70-90 ℃, 110-130 ℃, 160-180 ℃, 180-200 ℃ 180-200 ℃, 170-190 ℃, 180-200 ℃ and 180-200 ℃;
the side feeding is carried out in zone 9.
7. A wood plastic compatibilizer comprising the N-carbonyl-bisamido-polyolefin compound according to any one of claims 1 to 6.
8. Use of the wood plastic compatibilizer of claim 7 in the preparation of a wood plastic composite.
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| CN115651204A (en) | 2023-01-31 |
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