活化改性对LDPE棚膜性能的影响研究

Study on Effects on Properties of LDPE Films Modified Activation

在过氧化二异丙苯的作用下,利用乙烯三甲基硅烷对LDPE活化改性,从而制备出活化改性母粒,加入不同质量的阻聚剂控制活化反应的程度。结果表明:十二烷基硫酸钠(SDS)的加入,可以降低母粒的熔指,N,N-二甲基甲酰胺(DMF)的加入,提高了母粒的熔指; SDS和DMF均可使棚膜的拉伸强度提高; DMF的加入,会使棚膜的可见光透过性下降;当SDS加入量为0. 04 g时,拉伸强度最高,达到17. 99 kPa,可见光的透过性也最好,为87%。

Under the action of diisopropylbenzene peroxide, LDPE was activated by vinyltrimethylsilane, and theactivated masterbatch was prepared. The degree of activation reaction was controlled by adding different mass ofinhibitors. The results showed that the addition of SDS can reduce the molten masterbatch, the addition of DMF canimprove the masterbatch melt index. SDS and DMF can improve the tensile strength of the films. The addition of DMF willreduce the visible light transmittance of the film. When the amount of SDS was 0. 04 g, the tensile strength was up to17. 99 kPa, visible light transmittance was the best as 87%.