化学交联模压法制备NR-g-(GMA-co-St)/PVC共混泡沫材料  

Preparation of NR-g-(GMA-co-St)/PVC blended foam by chemical cross linking and one-step compression molding

作　　者：李志君[1] 余浩川[1] 

机构地区：[1]华南热带农业大学高分子材料与工程系,海南儋州571737

出　　处：《弹性体》2007年第5期10-13,共4页China Elastomerics

基　　金：海南省自然科学基金资助(50302)

摘　　要：采用化学交联模压法制备甲基丙烯酸缩水甘油酯/苯乙烯(GMA/St)熔融接枝天然橡胶[NR-g-(GMA-co-St)]和聚氯乙烯(PVC)共混泡沫材料。研究了橡塑比、增塑剂邻苯二甲酸二辛酯(DOP)用量、发泡剂种类及用量对泡沫材料性能的影响以及泡沫材料的微孔结构。结果表明,当橡塑共混比为70/30、DOP和复合发泡剂的质量分数分别为30%和8%时,可制得密度较小,具有较好综合力学性能的NR-g-(GMA-co-St)/PVC泡沫材料。NR/PVC泡沫材料的泡孔尺寸稳定性较差且以开孔为主,而NR-g-(GMA-co-St)/PVC泡沫材料以闭孔为主,且泡孔小、分布均匀。NR-g-（GMA-co-St）/PVC microcellular polymeric foams were prepared by means of chemical cross-linking and one-step compression molding. The effects of blending ratio of NR-g- （GMA-co-St）/PVC, dosage of dioctyl phthalate（DOP）, type and dosage of blowing agent on properties of NR-g-（GMA-co-St）/PVC foams were investigated and the microstructure of foams was observed by Scanning Optical Microscope（SOM）. The results showed that, the low density, good comprehensive mechanical properties of NR-g-（GMA-co-St）/PVC foams were obtained when blending ratio of NR-g-（GMA-co-St）/PVC was 70/30 , mass ratio of DOP was 30%, mass ratio of compound blowing agent was 8% respectively. The diameters of cells of NR-g-（GMA-co-St）/PVC foam were little. The foams had uniform cellular structure and were mainly made up of closed-cells.

关 键 词：聚氯乙烯 天然橡胶 化学交联 泡沫材料 

分 类 号：TQ332.5[化学工程—橡胶工业]