摘要
采用γ射线固相辐射接枝方法,在聚丙烯粉末表面接枝乙烯基三甲氧基硅烷制备PP-g-Si。研究了不同吸收剂量对聚丙烯接枝率的影响,发现加入第二单体苯乙烯可以提高其接枝率到4.2%。吸收剂量的提高可显著提高硅烷在聚丙烯上的接枝量,使得接枝聚丙烯水解后物理交联凝胶含量增加。由于γ射线辐射会引起聚丙烯分子链断裂,经固相辐射接枝聚丙烯的熔体流动速率会变大。利用DSC研究了产物PP-g-Si的熔点随辐射吸收剂量的变化,同时以XRD研究了PP-g-Si的结晶形态。
γ-rays irradiation was used to graft monomers vinyltrjmethoxysilane onto polypropylene powders and then the obtained PP-g-Si was hydrolyzed to get cross-linking. In this paper, the effects of the absorbed dose on the grafting degree of the monomer vinyltrjmethoxysilan and gel content of the cross-linked samples were investigated. Adding the styrene as the second monomer can make grafting ratio up to 4.2%. The grafting ratio increases with the increment of absorbed dose, while gel content of the cross-linked samples induced by hydrolysis does not increase simultaneously. Because the irradiation can cause the molecular main-chain broken, melting flow rates （MFR） of PP-grafting-vinyltrjmethoxysilane decreases. The melting temperature of PP-g-Si has been investigated by DSC and crystal structure of PP-g-Si has also been studied by use of XRD.
出处
《辐射研究与辐射工艺学报》
CAS
CSCD
2009年第5期261-264,共4页
Journal of Radiation Research and Radiation Processing
基金
安徽省安徽优秀青年基金(06044097)
安徽省教育厅自然科学基金(2008KJ036A)资助
