摘要
采用阻滞阴离子聚合方法,以自制多锂为引发剂,三异丁基铝为阻滞剂,成功制备了一系列含星形S/I/B三元共聚物的星形高抗冲聚苯乙烯(S-HIPS)。研究了四氢呋喃(THF)对含星形S/I/B三元共聚物的S-HIPS微观结构的影响,并考察了其抗冲击性能。结果表明:随THF加入量的增大,橡胶相的玻璃化转变温度显著升高;树脂相对分子质量和橡胶相中聚苯乙烯嵌段含量对含星形S/I/B三元共聚物的S-HIPS的冲击强度有较大贡献;当其他条件相似时,含星形S/I/B三元共聚物的S-HIPS的冲击强度是线形结构HIPS的近2倍;与含星形S/B二元共聚物的S-HIPS相比,含星形S/I/B三元共聚物的S-HIPS中异戊二烯的加入使其冲击强度提高了近1倍。
A series of star high impact S/I/B copolymers were synthesized based on retarded anionic polymerization （RAP） by use of muhifunctional alkyl lithium （m-Li） as initiator and i-Bu3A1 （TIBA） as retarder. With the increasing of THF, the glass transition temperature of star high impact S/I/B copolymers in rubber phase rises gradually; the molecular weight of resin phase and the content of polystyrene block in rubber phase make big contribution on the impact strength of the polymer. The impact properties of star high impact S/I/B copolymers are nearly twice as the linear S/I/B copolymers. The introduction of isoprene improves the impact properties of copolymers with same butadiene content, its impact strength is nearly doubling that of the star S/B copolymers.
出处
《合成树脂及塑料》
CAS
北大核心
2016年第1期7-11,24,共6页
China Synthetic Resin and Plastics
基金
中央高校基本科研项目(DUT13RC208)
