化学交联模压一步法制备改性PVC泡沫塑料  

Preparation of Modified Poly(vinyl chloride)Foam by Chemical Crosslinking and One-step Compression Molding

作　　者：张军[1] 梁亚军[1] 

机构地区：[1]南京化工大学材料学院高分子系,南京210009

出　　处：《中国塑料》2000年第7期55-61,共7页China Plastics

摘　　要：以聚氯乙烯 (PVC)为主体材料 ,加入丁腈橡胶 (NBR)进行共混改性 ,采用高温共混、化学交联模压一步法来制备改性PVC泡沫塑料。探讨增塑剂邻苯二甲酸二辛酯(DOP)、丁腈橡胶、发泡剂偶氮二甲酰胺 (AC)和戊次甲基四胺 (H)、交联剂过氧化二异丙苯 (DCP)、填料碳酸钙 (CaCO3)等的用量对PVC泡沫塑料性能的影响。实验表明 ,当选择PVC 10 0份、NBR 6 0份、DOP 6 0份、AC 4.0份、H 4.0份、DCP 1份、稳定剂三盐基硫酸铅 (3PbO·PbSO4 ·H2 O) 3份、二盐基亚磷酸铅 (2PbO·PbPO3·1/2H2 O)2份可制得密度较小、回弹性较好、具有一定力学强度的改性PVC泡沫塑料。电镜照片分析表明 :NBR改性PVC泡沫塑料的泡孔结构均匀 ,孔径约在 10 0～2 0 0 μm之间。Based on blending of poly (vinyl chloride)(PVC)and nitrile-butadine rubber(NBR),modified PVC foam is prepared by chemical crosslinking and one step compression molding.Effects of various additives such as DOP,NBR(plasticizer),H(foaming agent),CaCO 3(filler),dicumyl peroxide (DCP)are probed.Optimum dosage for the foam is :PVC 100,NBR 60,DOP 60,H 4,DCP 1,3PbO·PbSO 4·H 2O 3,2PbO·PbPO 3·1/2H 2O 2,and the foam is endowed with lower density,better elasticity and good mechanical properties.SEM shows that the foam has uniform cellular structure and diameters of cells are about 100～200 μm.

关 键 词：聚氯乙烯 丁腈橡胶 泡沫塑料 化学交联 模压法 

分 类 号：TQ328[化学工程—合成树脂塑料工业]