第45卷第2期
2017年2月【材料与性能】
聚氰乙烯 Polyvinyl Chloride
絮凝增韧PVC树脂的制备及性能
李静，，张桦，刘容德，刘浩，苏建华
（中国石油化工股份有限公司齐鲁分公司研究院，山东潘博255400）
【关键调］PVC；丁睛胶乳；增韧；絮凝；性能；应用
Vol.45.No.2 Feb.，2017
【摘要】采用案聚方式制备了丁睛胶乳增韧PVC树脂，研究了款凝剂、防老剂、隔高剂对树脂性能的影响，考察了丁胶乳用量对树脂力学性能和塑化性能的影响，并进行了加工应用试验。结果表明：①宜采用絮凝剂B、液态防老剂B来制备絮凝增韧PVC树脂：②隔离剂的用量应随丁睛胶乳的用量增加而增加，当丁胶乳用量为11 份时，隔离剂用量为3份：③随着丁胶乳用量的增加，絮凝增韧PVC树脂的冲击强度逐渐提高，并且明显高于相同丁睛橡胶用量的共混增韧PVC树脂，面拉伸强度则逐渐下降，且两种树脂相差不大；④随着丁睛胶乳用量的增加，款凝增韧PVC树脂的塑化时间逐渐缩短，塑化扭矩和平衡扭矩逐渐升高；③絮凝增韧PVC树脂可顺利替代普通PVC树脂和冲击改性剂。
【中图分类号】TQ325.3
【文献标志码】B
[文章编号】10097937(2017)02002009
Preparationandpropertiesofflocculate-toughenedPvC
LIJing，ZHANGHua，LIURongde,LIUHao,SUJianhua
(ResearchInstituteof QiluBranchCo.，SINOPEC，Zibo255400，China)
Key words: PVC; nitrile latex; toughening; flocculation; property; application
Abstract: Nitrile latex-toughened PVC resins were prepared by flocculation. The effects of floccu-lant, anti-aging agent, and isolating agent on properties of the resins were studied. The effects of nitrile latex amount on mechanical properties and plasticizing properties of the resins were investigated. Process-ing and application tests were carried out. The results showed that the flocculate-toughened PVC should be prepared with flocculant B and liquid anti-aging B. With the increase in nitrile latex amount, the isola-ting agent amount should increase too. When the nitrile latex was 11 phr, the isolating agent was 3 phr. With the increase in nitrile latex amount, the impact strength of flocculate-toughened PVC gradually in-aaseaaseaee ened by blending with the same amount of nitrile rubber. With the increase in nitrile latex amount, the tensile strength of flocculate-toughened PVC decreased, and the tensile strengths of the two kinds of resins were almost the same. With the increase in nitrile latex amount, the plasticizing time of flocculate-tough-ened PVC gradually shortened, and the plasticizing torque and balance torque gradually increased. The flocculate-toughened PVC could successfully replace the common PVC resin and impact modifier.
PVC是一种综合性能优良的通用塑料。与PE 相比,PVC分子链上含有极性较强的C一CI键，使 PVC树脂在宏观上具有刚性强、阻燃性高、透明性好等突出特点，因此在管材、型材、透明片材等领域
，【收稿日期】20160320
得到广泛应用。然而，正是由于PVC分子结构的这种特点，其存在韧性差、热稳定性差、加工困难等缺陷，从而在部分领域的应用受到了限制，如在高抗冲管材制品领域受到了PE管材的严重冲击。在常温
【作奢简介】李静（1963一），男，工程师，1985年毕业于山东师范大学，从事PVC加工应用方面的研究。
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