摘要
马来酸酐(MAH)和苯乙烯(St)双单体固相接枝聚1-丁烯(1-PB),制备功能化MAH与St双单体接枝的1-PB,研究了反应条件对接枝产物的影响。结果表明:当反应温度为100℃,MAH单体用量(即占1-PB质量的百分数。下同)为6%,过氧化苯甲酰用量为0.6%,n(St)∶n(MAH)=2∶1时,MAH与St双单体接枝1-PB展现出较高的熔体强度,达4.87 kPa·s。在接枝体系中,St的存在既提高了MAH的接枝效率,也抑制了1-PB大分子自由基的降解,MAH与St接枝链改变了1-PB分子的支链结构与相对分子质量分布,同时一定程度上提高了接枝产物的熔融温度与结晶温度,结晶速率有所提高,球晶形貌较为完善。
Maleic anhydride(MAH)and styrene(St)were grafted on poly-1-butene(1-PB)as dual monomers via solid-phase grafting to prepare functionalized 1-PB grafted with MAH and St[PB-g-(St-co-MAH)].The effects of different reaction conditions on grafting products were investigated.The results show that the melt strength of PB-g-(St-co-MAH)is as high as 4.87 kPa·s when the reaction temperature is 100oC,the mass fraction of MAH monomer and benzoyl peroxide in 1-PB are 6%and 0.6%respectively,and the molar ratio of St to MAH is 2∶1.St in the grafting system not only enhances the grating efficiency of MAH,but also inhibits the degradation of 1-PB macromolecular free radical.The grafting chain of MAH and St changes the branched structure and the relative molecular mass distribution of 1-PB molecules,and improves the melting and crystallization temperatures of the grafting products whose crystallization rate are improved as well and whose spherical crystal morphology are more perfect.
作者
翟昌休
高宇新
赵兴龙
Zhai Changxiu;Gao Yuxin;Zhao Xinglong(Daqing Petrochemical Research Center,Petrochemical Research Institute of China National Petroleum Corporation,Daqing 163714,China)
出处
《合成树脂及塑料》
CAS
北大核心
2021年第5期34-38,51,共6页
China Synthetic Resin and Plastics
关键词
聚1-丁烯
固相接枝
马来酸酐
苯乙烯
熔体强度
poly-1-butene
solid-phase grafting
maleic anhydride
styrene
melt strength
