摘要
将合成的含β双键表面活性剂(βS)与辐照的线形低密度聚乙烯(PE-LLD)在双螺杆挤出机中进行反应接枝,并对接枝物的结构进行了表征。研究了单体含量、反应温度、转速对接枝率的影响,将接枝产物吹膜,对膜的流滴性能进行了表征,结果表明,PE-LLD接枝βS(PE-LLD-g-βS)的红外光谱在3446、1722和1123 cm^(-1)处有吸收峰,这是βS的羟基、酯基和醚键特征峰,说明βS已经接枝到PE-LLD分子链上；PE-LLD-g-βS的接枝率随单体含量的增加和反应温度的升高而增加,但随螺杆转速的提高而降低,当βS含量为2%(质量分数,下同)、反应接枝温度为200℃、螺杆转速为150 r/min时,接枝率为1．1%；60℃条件下,PE-LLD-g-βS膜的流滴期是76d,而普通流滴膜为17d。
Grafting-copolymerization of linear low density polyethylene （PE-LLD）with surfactant containing βdouble bond （βS） was carried out by β-ray irradiation in a twin-screw extruder. FT-IR was used to characterize the formation of grafting copolymer and evaluate their degree of grafting. The effects of monomer concentration, reaction temperature and screw speed on grafting degree were studied systematically. From FT-IR spectra, it was found that the peaks at 3 446,1 722, and 1 123 cm^-1 for PE-LLD-g-βS appeared, which are attributed to contribution of hydroxyl, carbonyl and ether linkage of 13S. These results verified that βS had been grafted onto the PE-LLD molecular chains. The degree of grafting of PE-LLD-g-βS increased with the increasing reaction temperature and monomer concentration, but decreased with the increasing screw speed. When βS concentration was 2.0 wt%, reaction temperature was 200 ℃, and screw speed was 150 r/min, the degree of grafting was 1.1 wt%. The dripping durability of PE-LLD-g-βS film and common dripping film at 60 ℃ were 74 days and 17 days, respectively.
出处
《中国塑料》
CAS
CSCD
北大核心
2006年第11期66-70,共5页
China Plastics
基金
国家自然科学基金重大项目(50390090)
关键词
表面活性剂
聚乙烯
接枝
薄膜
流滴性
surfactant
polyethylene
grafting
film
dripping durability
