【摘要】 本文用RuO₄染色法研究了LIPN PBA/PS/PMMA乳胶粒的形态结构.结果表明,当采用油溶性引发剂AIBN时得反转的核壳结构,反之,若采用水溶性引发剂K₂S₂O₈时得规则的核-壳结构.降低聚合反应温度、增加K₂S₂O₈浓度及交联剂用量都有利于形成核-壳状形态结构的乳胶粒.同时,与滴加法相比,当采用一次加料法对乳胶粒核-壳结构的规整性下降,过渡层厚度增大.实验结果表明,PS 与 PMMA 之间有少量接枝聚合物产生.更多还原

【Abstract】 In this paper,the morphology and structure of LIPN PBA/PS/PMMA latex particles was studied by using RuO₄-staining technique.The results has shown that when oil-soluble initiator AIBNis employed,the“inverted”core- shell morphology was formed,on the contrary,when water-soluble initiator, K₂S₂O₈,is used,the regular core,shell morphology is resulted.The core- shell latex particles are favourable to be formed with decreasing of polymer ization temperature and with increasing of K₂S₂O₈ concentration and of the dosage of crosslinking agent.In addition,as compared with drop- adding method,when once-through dosing is used,the core-shell regularity of latex particles decreases and the transition layer become thicker.The experimental results show that a little graft copolymer is formed between PS and PMMA.更多还原