针对聚氯乙烯(PVC)耐热性和韧性差的缺陷,利用共混一交联协同技术对PVC进行改性,通过熔融纺丝法制备了PVC改性纤维,采用红外、动态力学分析仪、差示扫描量热仪和扫描电镜对纤维PVC/PS体系的相客性进行了研究.聚苯乙烯(PS)能有效地提高PVC的韧性,在交联助剂苯乙烯单体和三乙醇胺的作用下,过氧化二异丙苯(DCP)可有效地交联PVC,苯乙烯单体与大分子自由基发生接枝聚合,生成的接枝聚合物可作为就地增容剂改善PVC/PS体系的相容性.
Polyvinylchloride(PVC) was modified using the mechanism of blending-crosslinking synergism, which was used to produce the modified fibers by melt spinning process. The compatibility of the fibers with PVC/PS blends system were investigated by using Fourier transform infrared spectrophotometry, differential scanning calorimetry, dynamic mechanical analyzer and scanning electron microscope. The results show that polystyrene(PS), as organic rigid particles, can improve toughness of PVC effectively, and dicumyl peroxide can crosslink PVC effectively in the presence of styrene and triethanolamine. The graft polymers, which are produced by styrene and macromolecular free radical being in chemical reaction during melt blending, have a good compatibilization on PVC/ PS blends as compatibilizer in situ.
参考文献
| [1] | Saethre B.;Gilbert M. .PEROXIDE CROSSLINKING OF PLASTICIZED POLY(VINYL CHLORIDE)[J].Polymer: The International Journal for the Science and Technology of Polymers,1996(15):3379-3386. |
| [2] | 马国维 .不相容聚合物聚氯乙烯/聚乙烯共混中相分散-交联协同作用机理的研究[D].浙江大学,2003. |
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