中国塑料2018，Vol.32Issue(5)：41-47,7.DOI:10.19491/j.issn.1001-9278.2018.05.006
硅烷交联EVA/PP/MH复合材料的制备和性能
Preparation and Properties of Silane-crosslinked EVA/PP/Magnesium Hydroxide Compounds
张建耀1
作者信息
- 1. 常熟理工学院化学与材料工程学院,江苏常熟215500
- 折叠
摘要
Abstract
Halogen-free flame-retardant compounds based on silane-crosslinked PP and EVA were prepared through a two-step melt blending method using magnesium hydroxide (MH) as a flame retardant,and the crosslinking efficiency of silane grafted onto EVA/PP compounds were investigated in terms of block-copolymerized PP (PP-B) and homo-PP(PP-H).The mechanical properties,hot elongation performance and flame-retardant properties of compounds were investigated by using universal testing machine,hot-set elongateion tester,limiting oxygen index and vertical burning experiments.The results indicated that the silane-crosslinked EVA/PP-B compounds achieved a higher crosslinking degree than the EVA/PP-H ones.The EVA/PP-B crosslinked compound could reach the crosslinking level required when the content of MH was lower than 120 phr.With increasing the MH content from 80 to 160 phr,the limiting oxygen index values of compounds increased from 25.0 to 32.2 vol ％,which were improved by 0.5 ％～1.5 ％compared to the un-crosslinked ones.The flame retardancy of compounds was improved up to the V-0 grade of GB/T 2408-2008 when the MH content exceeded 120 phr.The compounds were found to undergo a two-stage thermal degradation,in which the first stage involved the dehydration of MH and decarboxylic reaction of EVA and the second one involved the thermal pyrolysis of polymer main chain and volatilization of residues.关键词
硅烷交联/无卤阻燃/聚丙烯/乙烯-醋酸乙烯酯共聚物/氢氧化镁Key words
silane-crosslinking/halogen-free flame retardant/propylene/vinyl-acetate copolymer/magnesium hydroxide分类
化学化工引用本文复制引用
张建耀..硅烷交联EVA/PP/MH复合材料的制备和性能[J].中国塑料,2018,32(5):41-47,7.
