PVC管材成型工艺设计.docVIP

本科学生毕业论文 PVC管材成型工艺设计 黑 龙 江 工 程 学 院 二○一二年六月 The Graduation Thesis for Bachelors Degree orming Process Design of PVC Pipe Heilongjiang Institute of Technology 2012-06·Harbin 摘 要 本课题利用物理、化学改性方法的有机结合，配合刚性无机粒子增强增韧理论及微纳米粉体处理技术，对聚氯乙烯()进行改性。通过氯化聚乙烯、丙烯酸酯类等高分子有机物与PVC分子接枝的化学改性，改变了PVC分子结构(类似于层状、网状结构)，并将其长链高分子进行高速缠绕，形成高抗冲型的层、网状结构，且结构中的分子间的作用力大大增强从而有效吸收外部冲击能量，提高其抗冲击能力。利用微纳米无机粉体增强增韧技术，将轻质碳酸钙通过稀土进行活化，使得无机刚性粒子充分均匀分散至网层状结构中，从而在保证聚氯乙烯刚性的同时提高其韧性。 结果表明：当ACR的用量为4份时，管材的冲击强度为21.92KJ/m2；当ACR用量多于或少于4份时，管材的冲击强度均低于21.92KJ/m2。可见，增韧剂用量对高抗冲聚氯乙烯抗冲性能有直接的影响，随ACR用量的增加而出现峰值，以ACR用量为4%为最佳。 关键词：聚氯乙烯双螺杆挤出机增韧剂用量冲击性能 ABSTRACT This topic physical and chemical modification methods organically，cooperate with inorganic rigid particles strengthening toughening theory and micro nano powder processing techniques，the polyvinyl chloride (PVC) modificationThrough the chlorinated polyethylene，acrylate polymer molecules such as organic matter and PVC grafting chemical modification，change the PVC molecular structure (similar to the layer，mesh structure)，and the long chain polymer for high speed winding，forming type layer，resistant to blunt mesh structure，and the structure of the force between the molecules to greatly enhance the effective absorption external impact energy，improve the shock resistance abilityUsing the micro nano inorganic powder enhance toughening technology，will light calcium carbonate through the rare earth is activated，making inorganic rigid particles fully equably dispersed to nets layer structure，thus in the guarantee of the rigid polyvinyl chloride (PVC) and at the same time，improve its toughness. The result shows that when the dosage of ACR for 4 a，the impact strength of pipes for 21.92 KJ/m2； When ACR more or less amount of 4，the impact strength of pipes were lower than 21.92 KJ/m2it is thus clear that，toughening agent，high resistance to blunt blunt of polyvinyl chloride (PVC) have a direct effect on performance，with the increase of the content of the ACR and appear peak，to 4% for best ACR