超分子插层结构耐迁移型聚丙烯抗氧剂的组装及性能研究化学工程与技术专业论文.docxVIP

北京化工大学硕士学位论文的添加未改变PP的晶型结构。 北京化工大学硕士学位论文 的添加未改变PP的晶型结构。 (2)通过傅利叶变换红外光谱仪(FT-m)、紫外．可见光分光光 度计(Uv_vis)等手段详细考察了CaAl．MP．LDH的添加量对PP复 合材料耐光、耐热氧老化性能以及MP活性组分迁移行为的影响规 律。研究结果表明，当CaAl．MP．LDH添加量为1．0 wt％时，LDH／PP 复合材料的光稳定性能最佳，相比纯PP提高了2倍以上，且抗热氧 老化时间延长30倍，同时通过无机层板阻隔作用及无机．有机界面效 应有效抑制了MP的迁移和挥发，相比添加量为1．0 wt％的MP／PP复 合材料，迁出率降低50％，表现出优良的耐迁移性。 (3)通过差热天平(TG．DTA)、FT-IR等手段系统探索了 CaMg(Zn)A1．MP．LDH三元插层结构抗氧剂的层板组成和电荷密度与 PP复合材料光、热氧老化性能和层问客体的耐迁移性能问的构．效关 系。研究结果表明，当Ca：Zn：A1为2：1：1时，CaZnAI．MP．LDH／PP复 合材料具有最优异的热稳定性及抗热氧老化性能；当Ca：Zn：A1为 1：1：1时，CaZnAl．MP．LDH／PP复合材料的光稳定性能和耐迁移性能 突出；在层板中引入适量的Zn2+有利于增强三元插层结构抗氧剂的热 稳定性、耐热氧老化性能和层间客体MP的耐迁移性。 关键词：LDH、插层结构抗氧剂、共沉淀法、插层组装、LDH／PP复 合材料、耐迁移性 万方数据 ABS∞龇TPREPARATIoN ABS∞龇T PREPARATIoN AND PERFoRMANCE oF ANTI—MIGRATIoN PoLyPRoPYLENE ANTIoXIDANTS WITH SUPRAMoLECULAR STRUCTURE ABSTRACT Polypropylene(PP)has become an integral part of life and production materials due to rich source of raw materials，light weight, high mechanical strength and excellent corrosion resistance．PP is seriously suffered from oxidative degradation due to environmental factors such as light，heat and oxygen．Generally,a certain amount of antioxidants are required to retard the aging and degradation of PP during the procession．Yet，most of the used antioxidants are organic molecules and have a trenency of migrate to the surface of polymer because of good compatibility between organic antioxidants with organic polymer． Undoubtedly,the loss of the anti—oxidants will cause the weakness of anti．thermal oxidantive stability of polymer．Therefore，it is of interest and importance to explore novel polypropylene antioxidants with high performance and long duration． Layered double hydroxides(LDH)is one kind of two—dimensional anionic·inorganic functional materials with adjustable chemical composition and tuneable charge density in the host sheet，and changeable guest anions in the interlayer regions．LDHs has been widely used as various functional additives for polymers．It is possible to obtain ⅡI 万方数据 万方数据 万方数据 北京化工大学