N-羟基邻苯二甲酰亚胺引发的聚乙烯熔融接枝反应

doi:10.11944/j.issn.1000-0518.2020.05.190361

摘要/Abstract

摘要：

研究了N-羟基邻苯二甲酰亚胺(NOP)用于引发4种卤胺类前驱单体包括甲基丙烯酰胺(MA)、N-叔丁基丙烯酰胺(N-t-BuA)、马来酰亚胺(MI)和N,N-二烯丙基三聚氰胺(NDAM)与线性低密度聚乙烯(LLDPE)的熔融接枝聚合反应,并将其与工业上普遍应用的有机过氧化物(过氧化二异丙苯,DCP)引发法作对比。在接枝效率方面,NOP的引发效率与单体的分子结构和投料量密切相关。这4种单体中,N-t-BuA的接枝效率最高,与DCP法的差异在2.5%~16.0%之间;MI的接枝效率最低,比DCP法低55%。在副反应控制方面,实时扭矩、凝胶含量和熔融指数测试证实NOP引发体系中聚乙烯交联副反应程度明显低于DCP,接枝反应更加可控。

关键词: N-羟基邻苯二甲酰亚胺, 熔融自由基接枝, 聚乙烯

Abstract:

N-Hydroxyphthalimide (NOP) was used as the radical initiator in the melt graft polymerization of linear low density polyethylene (LLDPE) with four N-halamine precursors, methacrylamide (MA), N-tert-butyl acrylamide (N-t-BuA), maleimide (MI) and 2,4-diamino-6-diallylamino-1,3,5-triazine (NDAM). Meanwhile, the traditional peroxide method was conducted for comparison by using dicumyl peroxide (DCP) as the free radical initiator for melt grafting. The grafting efficiency of the NOP initiator is controlled by the molecular structure and the loading level of the monomer based on the quantitative Fourier transform infrared spectrometer (FT-IR) results. N-t-BuA shows the highest grafting efficiency, which is 2.5%~16.0% lower than that in the DCP system, while MI has the least grafting efficiency, about 55% of the DCP method. However, the crosslink side reaction in the NOP system is more controllable than that in the DCP system, as revealed by the real-time torque, the gel content and the melt index data.

Key words: N-hydroxyphthalimide, melt free radical grafting, polyethylene

文亮, 杨华伟, 石恒冲, 栾世方, 殷敬华, 施德安. N-羟基邻苯二甲酰亚胺引发的聚乙烯熔融接枝反应[J]. 应用化学, 2020, 37(5): 518-523.

WEN Liang, YANG Huawei, SHI Hengchong, LUAN Shifang, YIN Jinghua, SHI Dean. Melt Functionalization of Polyethylene Initiated by N-Hydroxyphthalimide[J]. Chinese Journal of Applied Chemistry, 2020, 37(5): 518-523.

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