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1、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O—二年六月TheGraduationThesisforBachelor'sDegreeTheFormingProcessDesignofPVCPipeHeilongjiangInstituteofTechnology2012-06-Harbin摘要木课题利用物理、化学改性方法的有机结合,配合刚性无机粒了增强增韧理论及微纳米粉体处理技术,对聚氯乙烯(PVC)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)
2、,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,且结构屮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/U?。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。
3、关键词:聚氯乙烯;双螺杆挤出机;增韧剂;用量;冲击性能ABSTRACTThistopicisusedofphysicalandchemicalmodificationmethodsorganically,cooperatewithinorganicrigidparticlesstrengtheningtougheningtheoryandmicronanopowderprocessingtechniques,thepolyvinylchloride(PVC)modificationThroughthechlorinatedpoly
4、ethylene,acrylatepolymermoleculessuchasorganicmatterandPVCgraftingchemicalmodification,changethePVCmolecularstructure(similartothelayer,meshstructure),andthelongchainpolymerforhighspeedwinding,formingtypelayer,resistanttobluntmeshstructure,andthestructureoftheforcebet
5、weenthemoleculestogreatlyenhancetheeffectiveabsorptionexternalimpactenergy,improvetheshockresistanceabilityUsingthemicronanoinorganicpowderenhancetougheningtechnology,willlightcalciumcarbonatethroughtherareearthisactivated,makinginorganicrigidparticlesfullyequablydisp
6、ersedtonetslayerstructure,thusintheguaranteeoftherigidpolyvinylchloride(PVC)andatthesametime,improveitstoughness-TheresultshowsthatwhenthedosageofACRfor4a,theimpactstrengthofpipesfor21.92KJ/m2;WhenACRmoreorlessamountof4,theimpactstrengthofpipeswerelowerthan2L92KJ/m2it
7、isthusclearthat,tougheningagent,highresistancetobluntbluntofpolyvinylchloride(PVC)haveadirecteffectonperformance,withtheincreaseofthecontentoftheACRandappearpeak,to4%forbestACRdosage.Keywords:Polyvinylchloride(PVC);Double-screwExtruder;TougheningAgents;Dosage;ImpactPr
8、operty目录摘要IABSTRACTII第1章绪论11.1课题背景与研究意义11.2PVC管材的性能和分类2121PVC管材的性能21.2.2PVC管材的分类41.3国内外PVC管材的现状及发展前景51.3.1PVC管材发展历程51.3.2PVC