摘要
以丁二烯、丙烯腈和不饱和羧酸为单体,采用低温三元乳液共聚方式合成羧基丁腈橡胶,研究了第3单体的种类及用量、分子量调节剂的用量及加入方式、转化率等对聚合过程及产物性能的影响,并采用红外光谱对产物进行了表征。结果表明,以甲基丙烯酸作为第3单体时聚合过程更为平稳,采用分批加入相对分子质量调节剂的方式更有利于控制产物的凝胶含量,单体转化率控制在78%~82%较为适宜,所合成产品的性能与德国Lanxess公司的X 146相当。
Carboxylated nitrile rubber was prepared by emulsion copolymerization at 5 ℃,using butadiene,acrylonitrile and unsaturated carboxylic acid as monomers. The influence factors,such as the different third monomers and their amounts,the amount of molecular weight regulator and its addition mode,conversion and so on,on copolymerization and product performance were studied,moreover,the obtained product was characterized by Fourier transform-infrared spectroscopy. The results showed that the polymerization was more stable when methacrylic acid was used as the third monomer,the stepwise addition of regulator was favourable for controlling the content of gel,and the conversion between78% and 82% was appropriate. The performance of synthesized product was similar to that of Lanxess X146.
出处
《合成橡胶工业》
CAS
CSCD
北大核心
2015年第1期11-14,共4页
China Synthetic Rubber Industry
关键词
羧基丁腈橡胶
低凝胶
合成
物理机械性能
carboxylated nitrile rubber
low gel content
synthesis
mechanical property
