| 于志省,李杨,杨娟,杨力,郭曦,张春庆,王玉荣.复合胶本体聚合法增韧ABS合成及结构与性能[J].,2011,(4):479-485 |
| 复合胶本体聚合法增韧ABS合成及结构与性能 |
| Synthesis, structure and properties of ABS toughened by composite rubber via bulk polymerization method |
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| DOI：10.7511/dllgxb201104003 |
| 中文关键词: 聚(丙烯腈-丁二烯-苯乙烯)共聚物 接枝 形态 力学性能 复合胶 本体聚合 |
| 英文关键词: poly(acrylonitrile-butadiene-styrene) copolymer grafting morphology mechanical property composite rubber bulk polymerization |
| 基金项目:国家自然科学基金资助项目(20774015)；中国石油天然气集团公司中青年创新基金资助项目(07E1034). |
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| 中文摘要: |
| 以镍系高顺式聚丁二烯橡胶(Ni-9004)、锂系低顺式聚丁二烯橡胶(Li-700A)及二者的复合胶做增韧改性剂,用本体聚合法合成了聚(丙烯腈-丁二烯-苯乙烯)(ABS)树脂,考察了聚合时间、复合胶用量对ABS聚合反应、接枝参数和微观形态的影响,并对复合胶不同配比下树脂形态及性能进行了研究．结果表明:随聚合时间的延长,Ni-9004的接枝率增大,而接枝效率和橡胶相体积分数均有所降低；聚合中发生明显的相转变,最终形态为经典的“核-壳”结构．当与Li-700A复合时,其形态可得到明显改善,且复合胶用量低时,有利于接枝和包藏,补强值为正；复合胶用量增加,粒子尺寸增大,补强值为负．另外,掺混入Ni-9004可显著提高Li-700A的增韧效果,当掺混量达75%时,在产品的拉伸性能得以保持的同时,Izod缺口冲击强度提高了150%以上． |
| 英文摘要: |
| The poly(acrylonitrile-butadiene-styrene) (ABS) resins were synthesized via bulk polymerization method using nickel catalyzed high-cis polybutadiene rubber (Ni-9004), lithium catalyzed low-cis polybutadiene rubber (Li-700A) and their composite rubbers as modifiers. The influences of reaction time and content of composite rubber on the polymerization reaction, grafting parameters and microstructures of ABS were investigated. And the morphologies and mechanical properties of resins under different incorporation ratio of composite rubbers were also researched. It is shown that the grafting degree of Ni-9004 gradually increases and its grafting efficiency and volume fraction of rubber phase gradually decrease with the reaction time. Besides, an obvious phase inversion occurs in the polymerization process and the final ABS resin presents a typical ″core-shell″ structure. And its morphology can be distinctly improved when combined with Li-700A. Furthermore, the lower amount of composite rubber is beneficial to grafting and occlusion, which shows a positive reinforcement value; an augmented particle size and a negative value are obtained while composite rubber amount increases. Performance measurements show that the toughening effect of Li-700A can be significantly enhanced by incorporating Ni-9004. When its incorporation content reaches 75%, the notched Izod impact strength of ABS resin is improved by at least 150%, while there is no loss of the tensile strength. |
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