离聚体改性聚乳酸复合材料的制备及性能研究

摘要：离聚体是一种离子交联或离子共价复合交联的弹性体。与低分子结晶成核剂相比，高分子结晶成核剂在提高聚合物结晶速度的同时，能有效避免聚合物材料的机械性能的过度损失。而离子聚合物是最为常用的高分子类结晶成核剂，其具有很长的碳氢主链，且侧基为羧酸基，羧酸基被部分或全部中和成盐，金属离子含量在15%以下，如乙烯-丙烯酸共聚物（EAA，聚乙烯蜡）的金属盐，磺化聚苯乙烯的金属盐等。离子聚合物既能作结晶成核剂，又能起到增韧作用。本课题尝试通过原位反应的方法构建离聚体成核剂，以期达到增韧聚乳酸且改善其结晶性能的作用。本课题设想通过熔融共混方式将EAA及纳米MgO和ZnO引入到PLA体系中，构建离聚体改性PLA材料，并对其性能进行评价。21327
毕业论文关键词：聚乳酸；乙烯-丙烯酸共聚物；氧化镁；氧化锌；原位反应
Preparation and Performance Research of Ionomer Modified Poly (lactic acid) Composites
Abstract：The ionomer is an ionic crosslinking or covalent complex ion crosslinked elastomer. Compared with the low molecular crystal nucleating agent, polymer crystallization nucleating agent at the same time of improving polymer crystallization speed, can effectively avoid the excessive loss of on the mechanical properties of the polymer materials. And ionic polymer is the most commonly used polymer crystallization nucleating agent, which has a long hydrocarbon main chain and the side groups is carboxylic acid groups, part or all of the carboxylic acid groups are neutralized to a salt and metal ions content under 15%，such as the metal salt of ethylene-acrylic acid copolymer (EAA, polyethylene wax), the metal salts of sulfonated polystyrene, etc. Not only ion polymer nucleating agent for crystallization, but also play a toughening effect. This subject attempts to construct the ionomer nucleating agent by in situ reaction, in order to achieve toughening polylactic acid and improve the effect of crystallization properties. This topic through melt blending method will be introduced to the EAA and nano MgO or ZnO style PLA in the system, construction of ionomer modified PLA materials, and to evaluate its performance.
Keywords:   Polylactic Acid; EAA; Magnesium Oxide; Zinc Oxide; Situ Reaction
目录
1   绪论   1
1.1   课题研究背景及意义   1
1.2   聚乳酸概述   1
1.2.1   聚乳酸的物理化学性质   2
1.2.2   聚乳酸的优点   2
1.2.3   聚乳酸制备方法与流程   3
1.3   羧酸型离聚体的研究进展   4
1.3.1   酸型离聚体的制备   4
1.3.2   酸型离聚体的结构   5
1.3.3   酸型离聚体的性能   6
1.3.4   羧酸型离聚体的应用   6
1.4   PLA的应用领域   7
1.4.1   PLA在医学领域的应用   7
1.4.2   PLA在包装领域的应用   7
2   实验部分   8
2.1   实验原料   8
2.2   主要仪器和设备   8
2.3   配方设计   9
2.3.1   PLA /ZnO/EAA复合材料构建   9
2.3.2   PLA/MgO/EAA复合材料构建   9
2.3.3   EAA与ZnO定比混合改性PLA复合材料构建   9
2.3.4   EAA与MgO定比混合改性PLA复合材料构建   10 离聚体改性聚乳酸复合材料的制备及性能研究:http://www.751com.cn/huaxue/lunwen_13480.html