摘要
用一次投料法、单体乳液滴加法和引发剂滴加法合成了有机硅改性丙烯酸酯共聚乳液。聚合过程、胶粒形态及乳液稳定性的观测结果表明:单体乳液滴加法是合成该类乳液的最佳方法。研究了单体乳液滴加法中有机硅含量与聚合反应及胶膜性能的关系。结果表明:有机硅含量在15%以下时,聚合反应可以顺利进行。胶膜性能不仅依赖于聚合时有机硅单体的总量,而且还依赖于有机硅单体中活性硅氧烷所占的比例。
Acrylate copolymer latexes modified with organosilicons were prepared using monomer emulsion addition process, batch and initiator addition processes, The results of particle morphology and latex stability, obtained from different copolymerization processes,showed that stable latex can be produced only by monomer emulsion addition process.Mechanisms of the emulsion polymerization were discussed.Films were casted from diluted latexes. Hardness, water absorption, solubility in THF of various films were also studied, it was found that polymerization and filmproperties are significantly influenced by organosilicon content.The cross-linking density of copolymers was increased and water absorption decreased with increase in organosilicons. Keeping the total organosilicon content constant (MATS+D4 at 10%by weight) and with increasing D4/MATS, latex film hardness was seriously diminished when D4/MATS was below 1, and a slow decrease was observed whenthis ratio was above 1.
出处
《高等学校化学学报》
SCIE
EI
CAS
CSCD
北大核心
1995年第11期1810-1813,共4页
Chemical Journal of Chinese Universities
基金
国家自然科学基金
关键词
丙烯酸酯
乳液聚合
有机硅化合物
胶膜性能
Modified acrylate copblymer latex, Emulsion polymerization process,Organosilicon compound, Film property