CN1267682A - Composite nanometer-level polypropylene/montmorillonoid material and its preparation - Google Patents
Composite nanometer-level polypropylene/montmorillonoid material and its preparation Download PDFInfo
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- CN1267682A CN1267682A CN 00104624 CN00104624A CN1267682A CN 1267682 A CN1267682 A CN 1267682A CN 00104624 CN00104624 CN 00104624 CN 00104624 A CN00104624 A CN 00104624A CN 1267682 A CN1267682 A CN 1267682A
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Abstract
Montmorillonoid after ion exchange reaction is intercalated by polypropylene via grafting and modifying intercalation reaction inside a liquid reactor, so that montmorillolnoid as laminar silicate is synthesized with the grafting part of polypropylene by means of Coulomb force and is dispersed in nanometer size into polypropylene to obtain composite nanometer level polypropylene/montmorillonoid material with excellent property. The process of the present invention is simple, high in production efficiency and low in cost.
Description
The present invention relates to a kind of polypropylene composite material and preparation method.Be specifically related to a kind of nano composite material and preparation method who forms by polypropylene and polynite.
Polypropylene is as a kind of thermoplastic resin of high-crystallinity, and price is low, relative density is less, chemical property is stable, electrical insulation capability is high, moulding processability is good, and mechanical property is better, and resistance toheat is higher.The drawbacks limit that but impact property is poor, molding shrinkage is high its use.Adopt and the elastomer blended method of modifying of rubber-like, the impact property of material improves, but rigidity descends greatly; Though fill common inorganic particulate the dimensional stability of resin and rigidity are improved, impact property is influenced.If adopt grain size to carry out filling-modified these shortcomings that remedies less than the filler grain of 100nm, but therefore this type of filler can not carry out dispersion on the nanoscale to it with the dispersing method of routine because particle diameter is superfine and have a great surface energy.Can improve the interface adhesion and to disperseing not have positive effect if filler is handled with coupling agent etc.Therefore traditional method can only obtain micron-sized matrix material, makes the not performance of advantage of ultrafine particle.
After patent US 5910523 adopts amino containing silane that surface treatment is carried out in the layered silicate polynite, the polyolefine of handling with the grafting that is dissolved in toluene makes nano composite material after mixing under the liquid phase, or carries out the mechanically mixing of graft polyolefin and polynite under melting condition.Polynite need be used the amino containing silane advanced processing in this invention, and polyolefine also need carry out graft modification in advance, mixes obtaining consistency polyolefin/montmorillonite composite preferably by both routines.The method that this invention adopts substep to prepare matrix material makes the homodisperse of nano-sized filler be difficult to realize, and processing step is too many, is difficult to suitability for industrialized production.
The purpose of this invention is to provide composite nanometer-level polypropylene/montmorillonoid material of a kind of mechanical property excellence and preparation method thereof.
The present invention adopts liquid phase intercalation legal system composite nanometer-level polypropylene/montmorillonoid material.Promptly in Liquid-phase reactor, pass through ion exchange reaction, enlarge the sheet interlayer spacing of polynite, the PP molecular chain and the grafted monomer of polarity processing simultaneously insert dispersion under liquid phase state, the polynite particle is homodisperse in the PP matrix, the formation polypropylene combines with the montmorillonite-based nano yardstick, obtains composite nanometer-level polypropylene/montmorillonoid material.Consisting of of matrix material:
1) polypropylene of 65～80wt%;
2) graft polypropylene of 15～20wt%;
3) polynite of 3～20wt%.
Composite nanometer-level polypropylene/montmorillonoid material preparation method of the present invention carries out according to the following steps:
Earlier with 0.5～20 part of polynite at dispersion medium I, 0.1 there is mechanical stirring down in～5 parts of protonating agents, form stable suspension, add 0.1～10 part of ion-exchanger and carry out cation exchange reaction, after exchange is finished with the distilled water wash throw out and add dispersion medium II, stirring is warming up to 115～135 ℃ dispersion medium I is removed, other adds 50～99 parts of polypropylene and dissolves, drop into the initiator of grafted monomer and 0.01～5 part in polypropylene dissolving back, holding temperature is reacted after 2～3 hours solution poured in 100～2000 parts of solution refrigerants and is obtained flocks, after the vacuum-drying finished product.
The used polypropylene of the present invention is the isotactic or the syndiotactic polypropylene of Industrial products level, can select the different trades mark for use according to purposes.
The used polynite of the present invention is a layer silicate mineral, and its unit cell is made up of two-layer silicon-oxy tetrahedron therebetween layer of aluminum oxygen octahedra, connects by public Sauerstoffatom between the two.The lamellar spacing of polynite is 1.5～2nm.The lamella internal surface has negative charge, can adsorb some metallic cations, as Na
+, Ca
2+, Mg
2+, Al
3+Deng, these positively charged ions can exchange with some other positively charged ion, adopt organic ammonium and polynite to carry out can enlarging the lamella distance after the permutoid reaction, help polymer molecular chain to insert montmorillonite layer, to form nano composite material.The cation exchange capacity of selected polynite (CEC) should be 50～200meq/100g, is preferably 90～110meq/100g.
The protonating agent that the present invention was suitable for can be hydrochloric acid, sulfuric acid, phosphoric acid, acetic acid etc.
The used grafted monomer of the present invention can be wherein a kind of of maleic anhydride, toxilic acid, diallyl maleate, phenylene bismaleimides, vinylformic acid, glycidyl methacrylate or be used with vinylbenzene, vinyl cyanide, acrylamide, methyl methacrylate, butyl acrylate.Its consumption is determined according to the content of graft polypropylene in matrix material.
The coupling of temperature of reaction is mainly considered in the selection of initiator, and with the transformation period of initiator under temperature of reaction be measurement index.Consider that from the temperature and the easy aspect that is easy to get of reaction initiator is preferably benzoyl peroxide.
The effect of dispersion medium is to carry out the ion-exchange of polynite and promote the homodisperse of polynite in polymkeric substance, dispersion medium kind and consumption are decided by polynite kind, resinous type, grafted monomer, the dispersion medium I that the present invention selects for use can be water, ethanol, methyl alcohol, and dispersion medium II can be dimethylbenzene, toluene, benzene.
Can also add additives such as toner, lubricant, nucleator in the level polypropylene/montmorillonoid matrix material of the present invention, these additives can separately or be used.
The polynite particle diameter is between 30～100nm in the composite nanometer-level polypropylene/montmorillonoid material provided by the invention, giving polymkeric substance sneaks into routine and is difficult to every excellent properties of obtaining in the mode, these particulates add man-hour as heterogeneous nucleation agent initiation crystallization at polypropylene in addition, make polyacrylic crystallization refinement, reduced spherulite size, made polypropylene/clay composite material obtain higher performance.
Embodiment 1:
Is the polynite 3g of 90meq/100g earlier, adds in the 100g water and be uniformly dispersed, and add the phosphoric acid mechanical stirring 0.5 hour of 1.5ml6M cation exchange capacity, quiet to ageing 24 hours dispersion liquid A.The 1.3g palmityl trimethyl ammonium chloride is dissolved in the 20g water, slowly add among the dispersion liquid A, under mechanical agitation, mixed solution is warming up to 80 ℃, and kept 0.5 hour, remove supernatant liquid and use distilled water wash, pour the stirring of 1000g toluene again into and be warming up to 130 ℃, normal pressure adds the 97g polypropylene in the dehydration back down, after finishing, the polypropylene dissolving adds the 24.25g maleic anhydride, again 9.7g vinylbenzene and 3.9g benzoyl peroxide are added in the reactor, react after 3 hours solution poured into wash in the 2000ml acetone flocculent precipitate, vacuum after dry nano composite material, this material is measured the interlamellar spacing of polynite in the material through the X-ray diffraction, and sample is observed through transmission electron microscope, test result shows that the polynite particulate disperses with nanoscale in the material, and the material property after the processing sees Table 1.
Embodiment 2:
Is the polynite 5g of 100meq/100g earlier, adds in the 100g water and be uniformly dispersed, and add the hydrochloric acid mechanical stirring 0.5 hour of 2ml6M cation exchange capacity, quiet to ageing 24 hours dispersion liquid A.The 2.2g palmityl trimethyl ammonium chloride is dissolved in the 20g water, slowly add among the dispersion liquid A, under mechanical agitation, mixed solution is warming up to 80 ℃, and kept 0.5 hour, remove supernatant liquid and use distilled water wash, pour the stirring of 1000g dimethylbenzene again into and be warming up to 130 ℃, normal pressure dehydration back adds the 95g polypropylene, after finishing, the polypropylene dissolving adds the 23.75g maleic anhydride, again 9.5g vinylbenzene and 2.8g benzoyl peroxide are added in the reactor, react after 3 hours, with solution pour into wash in the 2000ml acetone flocks, the throw out vacuum after dry nano composite material, the interlamellar spacing of this material polynite in X-ray diffraction mensuration material, and sample observed through transmission electron microscope, test result shows that the polynite particulate disperses with nanoscale in the material, the material mechanical performance after the processing sees Table 1.
Embodiment 3:
Is the polynite 10g of 100meq/100g earlier, adds in the 100g ethanol and be uniformly dispersed, and add the hydrochloric acid mechanical stirring 0.5 hour of 3ml6M cation exchange capacity, quiet to ageing 24 hours dispersion liquid A.4.4g palmityl trimethyl ammonium chloride and dodecyl dimethyl benzyl chlorination amine mixt are dissolved in the 20g ethanol, slowly add among the dispersion liquid A, under mechanical agitation, mixed solution is warming up to 80 ℃ and kept 0.5 hour, remove supernatant liquid and use distilled water wash, pour the stirring of 1000g dimethylbenzene again into and be warming up to 130 ℃, normal pressure dehydration back adds the 90g polypropylene, after finishing, the polypropylene dissolving adds the 22.50g maleic anhydride, again 9.0g vinylbenzene and 3.6g benzoyl peroxide are added in the reactor, react after 3 hours, with solution pour into wash in the 2000ml acetone flocks, the throw out vacuum gets nano composite material after dry, the interlamellar spacing of this material polynite in X-ray diffraction mensuration material, and sample observed through transmission electron microscope, test result shows that the polynite particulate disperses with nanoscale in the material, and the material mechanical performance after the processing sees Table 1.
Embodiment 4:
Is the polynite 10g of 100meq/100g earlier, adds in the 100g water and be uniformly dispersed, and add the hydrochloric acid mechanical stirring 0.5 hour of 3ml6M cation exchange capacity, quiet to ageing 24 hours dispersion liquid A.The 4.4g palmityl trimethyl ammonium chloride is dissolved in the 20g water, slowly add among the dispersion liquid A, under mechanical agitation, mixed solution is warming up to 80 ℃ and kept 0.5 hour, remove supernatant liquid and use distilled water wash, pour the stirring of 1000g dimethylbenzene again into and be warming up to 130 ℃, normal pressure dehydration back adds the 90g polypropylene, adding 25g vinylformic acid and 3.6g benzoyl peroxide after the polypropylene dissolving is finished adds in the reactor, react after 3 hours, with solution pour into wash in the 2000ml acetone flocks, the throw out vacuum gets nano composite material after dry, the interlamellar spacing of this material polynite in X-ray diffraction mensuration material, and sample observed through transmission electron microscope, test result shows that the polynite particulate disperses with nanoscale in the material, the material mechanical performance after the processing sees Table 1.
Embodiment 5:
Is the polynite 15g of 100meq/100g earlier, adds in the 100g water and be uniformly dispersed, and add the hydrochloric acid mechanical stirring 0.5 hour of 4ml6M cation exchange capacity, quiet to ageing 24 hours dispersion liquid A.The 6.6g palmityl trimethyl ammonium chloride is dissolved in the 20g water, slowly add among the dispersion liquid A, under mechanical agitation, mixed solution is warming up to 80 ℃ and kept 0.5 hour, remove supernatant liquid and use distilled water wash, pour the stirring of 1000g dimethylbenzene again into and be warming up to 130 ℃, normal pressure dehydration back adds the 85g polypropylene, after finishing, the polypropylene dissolving adds the 21.25g maleic anhydride, again 8.5g vinylbenzene and 1.7g benzoyl peroxide are added in the reactor, react after 3 hours, with solution pour into wash in the 2000ml acetone flocks, the throw out vacuum after dry nano composite material, this material is measured the interlamellar spacing of polynite in the material through the X-ray diffraction, and sample is observed through transmission electron microscope, test result shows that the polynite particulate disperses with nanoscale in the material, and the material mechanical performance after the processing sees Table 1.
Table 1 is every performance of nano composite material of the level polypropylene/montmorillonoid of embodiment 1-5
| Embodiment | Polynite content (g) | X ray 001 interplanar distance (nm) | Polynite median size (nm) | Notched Izod impact strength (J/m) | Tensile strength (MPa) | Elongation at break (%) | Modulus in flexure (MPa) |
| ????0 | ????26.5 | ????33 | ????400 | ??1650 | |||
| ??1 | ????3 | ????4.0 | ????＜100 | ????34.5 | ????36.7 | ????480 | ??2100 |
| ??2 | ????5 | ????3.8 | ????＜100 | ????32.5 | ????36.2 | ????460 | ??2850 |
| ??3 | ????10 | ????3.4 | ????＜100 | ????32.1 | ????42.5 | ????420 | ??3800 |
| ??4 | ????10 | ????3.2 | ????＜100 | ????31.0 | ????41.2 | ????430 | ??3500 |
| ??5 | ????15 | ????3.1 | ????＜100 | ????30.8 | ????44.6 | ????400 | ??4100 |
Annotate: polynite and polypropylene total amount are 100g
Table 1 is the result show, polynite is to be dispersed in the polyene matrix less than 100 nanometers in the compound village of the polypropylene montmorillonite-based nano material, the mechanical property of material improves significantly, especially modulus in flexure has improved nearly 150%, notched Izod impact strength has improved 30%, tensile strength improves 30%, and elongation at break also increases, and has reached to strengthen simultaneously and toughness reinforcing purpose.
Claims (9)
1. composite nanometer-level polypropylene/montmorillonoid material is characterized in that consisting of of described matrix material:
1) polypropylene of 65～80wt%;
2) graft polypropylene of 15～20wt%;
3) polynite of 3～20wt%.
2. the preparation method of a composite nanometer-level polypropylene/montmorillonoid material as claimed in claim 1 is characterized in that described matrix material prepares as follows:
Earlier with 0.5～20 part of polynite at dispersion medium (I), 0.1 there is mechanical stirring down in～5 parts of protonating agents, form stable suspension, add 0.01～15 part of ion-exchanger and carry out cation exchange reaction, after exchange is finished with the distilled water wash throw out and add dispersion medium (II), stirring is warming up to 115～135 ℃ dispersion medium (I) is removed, other adds 50～99 parts of polypropylene and dissolves, drop into grafted monomer in polypropylene dissolving back, add 0.1～5 part of initiator, holding temperature is reacted after 2～3 hours solution poured in 100～2000 parts of solution refrigerants and is obtained flocks, after the vacuum-drying finished product.
3. composite nanometer-level polypropylene/montmorillonoid material according to claim 1 and 2 and preparation method thereof, it is characterized in that described grafted monomer can be wherein a kind of of maleic anhydride, toxilic acid, diallyl maleate, phenylene bismaleimides, vinylformic acid, glycidyl methacrylate or with the compound of vinylbenzene, vinyl cyanide, acrylamide, methyl methacrylate, butyl acrylate.
4. composite nanometer-level polypropylene/montmorillonoid material according to claim 1 and 2 and preparation method thereof is characterized in that the cation exchange capacity (CEC) of described polynite is 50～200meq/100g
5. composite nanometer-level polypropylene/montmorillonoid material according to claim 1 and 2 and preparation method thereof is characterized in that the cation exchange capacity (CEC) of described polynite is preferably 90～110meq/100g.
6. the preparation method of composite nanometer-level polypropylene/montmorillonoid material according to claim 2, it is characterized in that described ion-exchanger is an organic amine, as palmityl trimethyl ammonium chloride, octadecyl trimethyl ammonium chloride, dodecyl benzyl dimethyl ammonium chloride, distearyl dimethyl ammonium chloride, Dodecyl trimethyl ammonium chloride and bromide thereof, it can separately or be used.
7. the preparation method of composite nanometer-level polypropylene/montmorillonoid material according to claim 2 is characterized in that described protonating agent is hydrochloric acid, acetic acid, sulfuric acid, phosphoric acid.
8. the preparation method of composite nanometer-level polypropylene/montmorillonoid material according to claim 2 is characterized in that described dispersion medium (I) is water, ethanol, methyl alcohol.
9. the preparation method of composite nanometer-level polypropylene/montmorillonoid material according to claim 2 is characterized in that described dispersion medium (II) is dimethylbenzene, toluene, benzene.
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|---|---|---|---|
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|---|---|---|---|
| CNB001046241A CN1182192C (en) | 2000-03-17 | 2000-03-17 | Composite nanometer-level polypropylene/montmorillonoid material and its preparation |
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| CN115772296A (en) * | 2022-12-23 | 2023-03-10 | 江西广源新材料有限公司 | Multifunctional filling modified polypropylene master batch and preparation method and application thereof |
| CN115772296B (en) * | 2022-12-23 | 2024-07-23 | 江西广源新材料有限公司 | Multifunctional filling modified polypropylene master batch and preparation method and application thereof |
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