摘要
用单螺杆挤出机制备了马来酸酐 (MAH) 苯乙烯 (St)对聚丙烯 (PP)的多组分单体自由基熔融接枝体系 .研究证实了当两种单体物质的量比约为 1∶1时 ,接枝物的接枝率最高 ,而熔体流动速率 (MFR)最大 .对反应体系影响因素的研究表明单体用量和引发剂用量对不同单体用量比的系列接枝物的接枝率会产生不同的影响 ;另外 ,单体用量增加 ,接枝物的MFR减小 ,过氧化二异丙苯 (DCP)用量增加 ,接枝物的MFR增加 .对多单体熔融接枝聚丙烯PP g (MAH co St)的力学性能研究发现 ,选用合适的单体用量比、单体用量和DCP用量时 。
Free radical melt-grafting of the multi-monomer system of maleic anhydride (MAH)/styrene (St) onto polypropylene (PP) has been studied by means of a single-screw extruder. It has been proved that the grafting degree and the melt flow rate (MFR) of the grafted PP both reached maximum points when molar ratio of the two monomer was 1 : 1. Monomer concentration and DCP content were found to have different effects on grafting level of the grafted PP obtained in systems with different concentration ratio of MAH to St. Besides, the MFR values of the grafted PP decreased with increasing monomer concentration and increased with increasing DCP content. The multi-monomers melt grafted PP, i . e . PP-g-(MAH-co-St) was investigated for its properties. Excellent mechanical properties were obtained when suitable monomer concentration ratio, monomer concentration and DCP content were applied to the grafting system.
出处
《高分子学报》
SCIE
CAS
CSCD
北大核心
2002年第1期7-12,共6页
Acta Polymerica Sinica
基金
华南理工大学聚合物成型装备国家工程研究中心科学与技术基金资助项目 (基金号 99 0 0 1)
