摘要
在单体转化率≥97％的条件下,实验室合成了总固物含量为45±5％、粒径分布为0.1—0.3μm、平均粒径为0.2μm的乙酸乙烯(VAc)-丙烯酸酯共聚乳液。该过程以单体和乳化剂预乳化、部分乳化液聚合完毕后连续满加剩余物料的效果为最好。单体的转化率随引发剂用量的增加而增加。乳液的粘度随VAc、乳化剂及引发剂用量的增加而增高。引发剂、乳化剂和丙烯酸酯用量分别为0.3、3和1-3％时胶膜的拉伸强度最高,拉伸强度还随着VAc用量的增加而增高。
The vinyl acetate-acrylate copolymerization emulsion with total solids content 45±5%, particle distribution 0.1-0.3 μm was laboratory-scale synthesized, under the condition of monomer conversion≥97%. The optimum feeding procedure was that the monomer and emulsifier were pre-emulsified, then part of the emulsion and initiator were added, and the rest materials were added finally after reaction. The results showed that the monomer conversion increased with the increase of initiator dosage, the viscosity of emulsion increased with the inerease of the dosages of vinyl acetate, emulsifier and initiator. The rubber film had the highest tensite strength when the dosages of initiator, emulsifier and acrylate were 0.3, 3 and 1-3%, respectively; the tensile strength increased also with the increase of vinyl acetate dosage.
出处
《合成橡胶工业》
CAS
CSCD
北大核心
1989年第4期247-250,共4页
China Synthetic Rubber Industry
关键词
乙酸乙烯
丙烯酸酯
乳液
共聚
vinyl acetate
acrylate
polymeric emulsion copoly-merizationj relationship between structure and properties
