CN103304914B - 超强超韧耐高温聚氯乙烯管材及其制备工艺 - Google Patents
超强超韧耐高温聚氯乙烯管材及其制备工艺 Download PDFInfo
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Abstract
本发明涉及塑料管材技术领域,具体涉及一种超强超韧耐高温聚氯乙烯管材及其制备工艺。包括以下重量份数的各组分:聚氯乙烯50-65份、氯化聚氯乙烯25-38份、抗冲剂12-18份、填充剂4-10份、稳定剂3-8份、增塑剂2-5份、外润滑剂0.1-0.6份、内润滑剂0.1-0.6份和改性剂3-7份。这种管材具有强度高、超韧好、耐高温、抗冲击、耐腐蚀及成本相对较低的优点,能够满足电力管的施工需要。
Description
技术领域
本发明涉及塑料管材技术领域,具体涉及一种超强超韧耐高温聚氯乙烯管材及其制备工艺。
背景技术
随着国家对电力行业的大力发展,目前市场上采用塑料类电力管越来越多,特别是在开挖型电力管道的铺设方式方面,大部分采用的是聚氯乙烯材料的电力管。与聚乙烯电力管材相比,聚氯乙烯因弹性模量较大,故有着较好的强度和抗冲击性能,与PP管材相比,聚氯乙烯有着较好的耐低温脆性和抗压强度。虽然氯化聚氯乙烯的部分特性优于聚氯乙烯,但是由于氯化聚氯乙烯的成本远远高于聚氯乙烯,因此聚氯乙烯在电力管道方面具有很大的潜力。但是目前的聚氯乙烯管材,由于强度相对较低、韧性相对较差、耐高温性能不好、且抗冲击性能欠佳,当作为电力管应用于需承受高压、高温的环境时,往往由于性能原因导致使用寿命较短。因此,一种具有高强、高韧、耐腐蚀、耐高温且成本相对较低的聚氯乙烯管材对电力管的应用具有非常重要的影响。
一个申请号为201110082741.5的发明专利,公开了一种聚氯乙烯管材,由以下组分构成:PVC树脂35~45%、复合稳定剂1~5%、硬脂酸0.1~0.5%、丙烯酸酯橡胶-72~5%、钛白粉0.5~1%、石蜡0.1~1%、增白剂10~20%和轻质碳酸钙35~45%。这种聚氯乙烯管材强度低、韧性差、耐高温性能不好、且抗冲击性能欠佳,不能满足电力管的施工需要。
发明内容
本发明的一个目的提供一种超强超韧耐高温聚氯乙烯管材,以解决目前应用于电力管的聚氯乙烯管材存在的强度相对较低、韧性相对较差、耐高温性能不好、且抗冲击性能欠佳不能满足施工需要的问题,同时也对管材进行改性,使其具有持久耐用、防止霉变以及防辐射屏蔽的功能。
本发明的另一个目的是提供超强超韧耐高温聚氯乙烯管材的制备工艺。
为了达到上述发明目的,本发明采用以下技术方案:
一种超强超韧耐高温聚氯乙烯管材,所述超强超韧耐高温聚氯乙烯管材的原料包括以下重量份数的各组分:聚氯乙烯50-65份、氯化聚氯乙烯25-38份、抗冲剂12-18份、填充剂4-10份、稳定剂3-8份、增塑剂2-5份、外润滑剂0.1-0.6份、内润滑剂0.1-0.6份和改性剂3-7份。各种助剂均与PVC树脂有一定的相容性,并且可以使PVC的结晶度增大,使混合体系中PVC结晶相的分子链均为平面锯齿状构型。配方体系中的稳定剂和改性剂配合,增大了PVC无定形相的分子链构象的稳定性,所以其综合性能大大提高。
作为优选方案,所述抗冲剂为MBS树脂,填充剂为平均粒径≤0.05μm的超细碳酸钙,稳定剂为硬脂酸钙。MBS树脂具有典型的核-壳结构,由于其溶度参数与PVC相近,故两者的热力学相容性好,通过MBS树脂与PVC的结合从而使得PVC在室温或低温下具有很高的抗冲击强度。少量的超细碳酸钙的混合可以与MBS结合,能够更好的提高抗冲击性能。
作为优选方案,所述增塑剂为邻苯二甲酸二辛酯,外润滑剂为高级脂肪酸,内润滑剂为高级脂肪醇,改性剂为ACR401。外润滑剂的高级脂肪酸月桂酸,内润滑剂的高级脂肪醇为硬脂醇。改性剂助剂的配合使用有利于提高树脂的加工性能,改进树脂的流变性能,有利于在热弹性状态下的熔体力学性能提高,使树脂的性能达到最佳要求。
作为优选方案,所述超强超韧耐高温聚氯乙烯管材的原料还包括重量份数为2-10份的氯化聚丙烯、1-4份的环氧树脂和2-4份的马来酸酐接枝聚丙烯。氯化聚丙烯能够与氯化聚氯乙烯和聚氯乙烯具有良好的两相界面相容性,且能够提高拉伸强度和无缺口冲击强度。环氧树脂为环氧树脂E51,其耐腐蚀、绝缘、且强度较高,在这个用量范围内,随着环氧树脂E51用量的添加,试样的缺口冲击强度、拉伸强度、断裂伸长率、维卡软化温度均得到有效增加,但用量过大时,各项性能会出现下降趋势。马来酸酐接枝聚丙烯可以成为增进极性材料与非极性材料粘接性和相容性的桥梁,可极大地改善填料的亲和性和填料的分散性,故能有效地增强填料在体系中的分散,从而提高拉伸和冲击强度。
作为优选方案,所述超强超韧耐高温聚氯乙烯管材的原料还包括重量份数为1-5份的防霉剂。由于管材在用于电力管方面时需要深埋于地下或者置于下水管道之中,恶劣的环境使得管材容易发生霉变,加入防霉剂能够提高管材的防霉性能,从而增加其使用寿命。
作为优选方案,所述防霉剂为硫酸铜。
作为优选方案,所述超强超韧耐高温聚氯乙烯管材的原料还包括重量份数为1-5份的金属纤维。管材应用于电力通信行业时,由于管内的电力通信线路会产生辐射及信号干涉,在管材内添加金属纤维后,这些金属纤维可以在管壁上形成金属网,从而具有防辐射屏蔽作用,达到了各管路之间的信号防干扰的目的。
一种超强超韧耐高温聚氯乙烯管材的制备工艺,具体包括以下步骤:
(1)初混
先将聚氯乙烯和氯化聚氯乙烯混合均匀,加热到123-127℃,热混12-18分钟,待用;
将氯化聚丙烯、环氧树脂和马来酸酐接枝聚丙烯混合均匀加热到135-150℃,热混15-30分钟,待用;
(2)共混
将步骤(1)的两种混合料混合,并加入抗冲剂、填充剂、稳定剂、增塑剂、外润滑剂、内润滑剂、改性剂、防霉剂和金属纤维,然后加热到150-165℃,热混10-20分钟,待用;
(3)挤出加工
采用螺杆挤出机进行挤出加工,挤出机的温度分布为:一区:150-165℃,二区:170-175℃,三区:170-180℃,四区:170-185℃,模具温度为180-195℃,螺杆转速10-15转/分钟,熔体压力为25-40MPa,冷却水温为28-35℃。
作为优选方案,各组分的重量配比为:聚氯乙烯50-65份、氯化聚氯乙烯25-38份、抗冲剂12-18份、填充剂4-10份、稳定剂3-8份、增塑剂2-5份、外润滑剂0.1-0.6份、内润滑剂0.1-0.6份、改性剂3-7份、氯化聚丙烯2-10份、环氧树脂1-4份、马来酸酐接枝聚丙烯2-4份、防霉剂1-5份和金属纤维1-5份。
本发明的有益效果为:本发明制备的超强超韧耐高温聚氯乙烯管材具有强度高、超韧好、耐高温、抗冲击、耐腐蚀及成本相对较低的优良特点,其维卡软化温度达到120℃以上,解决了传统聚氯乙烯管材存在的低温脆性、抗冲击性等问题。其使用温度范围从0℃-50℃扩大到了-20℃-70℃,与传统聚氯乙烯电力管材相比,在0℃的抗冲强度为传统聚氯乙烯电力管材的3倍以上,常温下的抗冲强度为传统聚氯乙烯电力管材的5倍以上。将本发明的产品在埋深0.7米的情况下,载重10吨的重物,管材不变形不破裂;直接在管材本体上载重10吨重物,管材出现变形但不破裂。与同一规格和等级的聚烯烃类管材相比,本发明的产品的生产成本降低了20~30%,更能提高市场竞争力;密度只有钢管的1/4~1/6,具有轻质高强,运输安装方便的特性,比钢管可节省运输安装服务费30%~50%,材料成本为钢管的70-80%。
同时,本发明的产品能够防止霉变造成的不利影响,从而提高了使用寿命,更重要的是由于本发明制备的产品内含有金属纤维使其具有防辐射屏蔽的功能,当将其应用于电力通信方面时,管材壁能够对管材内的线路起到防辐射屏蔽作用,避免了管路内的线路对外界的辐射干扰影响,同时也防止了管路之间的信号干扰,优化了线路,为良好的电力通信质量提供了保障。
具体实施方式
下面通过具体实施例对本发明的技术方案作进一步描述说明。
实施例1:
一种超强超韧耐高温聚氯乙烯管材,超强超韧耐高温聚氯乙烯管材的原料包括以下重量的各组分:聚氯乙烯50kg、氯化聚氯乙烯30kg、抗冲剂MBS树脂18kg、填充剂为平均粒径≤0.05μm的超细碳酸钙4kg、稳定剂硬脂酸钙4kg、增塑剂邻苯二甲酸二辛酯5kg、外润滑剂高级脂肪酸月桂酸0.1kg、内润滑剂高级脂肪醇硬脂醇0.5kg和改性剂7kg。
实施例2:
一种超强超韧耐高温聚氯乙烯管材,超强超韧耐高温聚氯乙烯管材的原料包括以下重量的各组分:聚氯乙烯55kg、氯化聚氯乙烯38kg、抗冲剂MBS树脂12kg、填充剂为平均粒径≤0.05μm的超细碳酸钙7kg、稳定剂硬脂酸钙8kg、增塑剂邻苯二甲酸二辛酯2kg、外润滑剂高级脂肪酸月桂酸0.4kg、内润滑剂高级脂肪醇硬脂醇0.6kg和改性剂3kg。
实施例3:
一种超强超韧耐高温聚氯乙烯管材,超强超韧耐高温聚氯乙烯管材的原料包括以下重量的各组分:聚氯乙烯65kg、氯化聚氯乙烯25kg、抗冲剂MBS树脂15kg、填充剂为平均粒径≤0.05μm的超细碳酸钙10kg、稳定剂硬脂酸钙3kg、增塑剂邻苯二甲酸二辛酯3kg、外润滑剂高级脂肪酸月桂酸0.6kg、内润滑剂高级脂肪醇硬脂醇0.1kg和改性剂5kg。
实施例4:
一种超强超韧耐高温聚氯乙烯管材,超强超韧耐高温聚氯乙烯管材的原料除了包括实施例1的各组分外,还有氯化聚丙烯2kg、环氧树脂E51 3kg和马来酸酐接枝聚丙烯4kg。
实施例5:
一种超强超韧耐高温聚氯乙烯管材,超强超韧耐高温聚氯乙烯管材的原料除了包括实施例2的各组分外,还有氯化聚丙烯6kg、环氧树脂E51 4kg和马来酸酐接枝聚丙烯2kg。
实施例6:
一种超强超韧耐高温聚氯乙烯管材,超强超韧耐高温聚氯乙烯管材的原料除了包括实施例3的各组分外,还有氯化聚丙烯0kg、环氧树脂E51 1kg和马来酸酐接枝聚丙烯3kg。
实施例7:
一种超强超韧耐高温聚氯乙烯管材,超强超韧耐高温聚氯乙烯管材的原料除了包括实施例4的各组分外,还有防霉剂硫酸铜1kg。
实施例8:
一种超强超韧耐高温聚氯乙烯管材,超强超韧耐高温聚氯乙烯管材的原料除了包括实施例5的各组分外,还有防霉剂硫酸铜3kg和金属纤维铜纤维5kg。
实施例9:
一种超强超韧耐高温聚氯乙烯管材,超强超韧耐高温聚氯乙烯管材的原料除了包括实施例6的各组分外,还有防霉剂硫酸铜5kg和金属纤维铜纤维4kg。
实施例10:
一种超强超韧耐高温聚氯乙烯管材,超强超韧耐高温聚氯乙烯管材的原料除了包括实施例7的各组分外,还有金属纤维铜纤维1kg。
实施例1到实施例10中超强超韧耐高温聚氯乙烯管材制备工艺的具体步骤如下:
(1)初混
先将聚氯乙烯和氯化聚氯乙烯混合均匀,加热到123-127℃,热混12-18分钟,待用;
将氯化聚丙烯、环氧树脂和马来酸酐接枝聚丙烯混合均匀加热到135-150℃,热混15-30分钟,待用;
(2)共混
将步骤(1)的两种混合料混合,并加入抗冲剂、填充剂、稳定剂、增塑剂、外润滑剂、内润滑剂、改性剂、防霉剂和金属纤维,然后加热到150-165℃,热混10-20分钟,待用;
(3)挤出加工
采用螺杆挤出机进行挤出加工,挤出机的温度分布为:一区:150-165℃,二区:170-175℃,三区:170-180℃,四区:170-185℃,模具温度为180-195℃,螺杆转速10-15转/分钟,熔体压力为25-40MPa,冷却水温为28-35℃。
Claims (1)
1.一种超强超韧耐高温聚氯乙烯管材,其特征在于,所述超强超韧耐高温聚氯乙烯管材的原料包括以下重量份数的各组分:聚氯乙烯50-65份、氯化聚氯乙烯25-38份、抗冲剂12-18份、填充剂4-10份、稳定剂3-8份、增塑剂2-5份、外润滑剂0.1-0.6份、内润滑剂0.1-0.6份和改性剂3-7份;所述抗冲剂为MBS树脂,填充剂为平均粒径≤0.05μm的超细碳酸钙,稳定剂为硬脂酸钙;所述增塑剂为邻苯二甲酸二辛酯,外润滑剂为高级脂肪酸,内润滑剂为高级脂肪醇,改性剂为ACR401;所述超强超韧耐高温聚氯乙烯管材的原料还包括重量份数为2-10份的氯化聚丙烯、1-4份的环氧树脂和2-4份的马来酸酐接枝聚丙烯;所述超强超韧耐高温聚氯乙烯管材的原料还包括重量份数为1-5份的防霉剂;所述防霉剂为硫酸铜;所述超强超韧耐高温聚氯乙烯管材的原料还包括重量份数为1-5份的金属纤维;
一种超强超韧耐高温聚氯乙烯管材的制备工艺,具体包括以下步骤:
(1)初混
先将聚氯乙烯和氯化聚氯乙烯混合均匀,加热到123-127℃,热混12-18分钟,待用;
将氯化聚丙烯、环氧树脂和马来酸酐接枝聚丙烯混合均匀加热到135-150℃,热混15-30分钟,待用;
(2)共混
将步骤(1)的两种混合料混合,并加入抗冲剂、填充剂、稳定剂、增塑剂、外润滑剂、内润滑剂、改性剂、防霉剂和金属纤维,然后加热到150-165℃,热混10-20分钟,待用;
(3)挤出加工
采用螺杆挤出机进行挤出加工,挤出机的温度分布为:一区:150-165℃,二区:170-175℃,三区:170-180℃,四区:170-185℃,模具温度为180-195℃,螺杆转速10-15转/分钟,熔体压力为25-40MPa,冷却水温为28-35℃。
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