摘要
采用模压发泡技术,以NaHCO3为协效发泡剂,制备了一系列兼具不同开闭孔形态的氯磺化聚乙烯橡胶(CSM)发泡材料。研究了NaHCO3对发泡CSM材料结构与性能的影响。结果表明,当NaHCO3用量为8phr时,构成了吸放热平衡发泡体系,胶料硫化性能最好。SEM显示,发泡材料均呈现两种尺寸水平并兼具开闭孔的微观结构。Nano-measure统计得出,随NaHCO3用量增加,泡孔平均直径增大,孔壁变薄,开孔率提高,在保证泡孔不被气体胀破的前提下,用NaH-CO3来提高开孔率的有效用量为12phr;压缩应力应变曲线表明,CSM泡沫具有典型弹性体发泡材料的特点,塌陷平台区的应力在NaHCO3用量为12phr-24phr时几乎不变。
The effect of synergistic foaming agent NaHCO3 content on structure and properties of chlorosulfonated polyethylene rubber （CSM） foam with both open and closed-cell structure produced by compression molding technology was investigated. The results show that CSM materials form a thermal balanced foaming system between ab^rbing and releasing, and have the best vulcanizing properties when NaHCO3 loading is 8phr. SEM results show that the foams have two size-level microstructures with both open and closed-cells. With the increase of NaHCO3 content, the average cell diameter increases and the cell wall thickness decreases. The open cell percentage increases gradually with the increase of NaHCO3 content. On the premise that the cellular structure is not bursted, the effective dosage of NaHCO3 is 12phr to increase the open cell percentage. The compression stress-strain curves of CSM foams have typical characteristics of elastomer foams. The stress at plateau zone almost keeps unchanged when NaHCO3 content is between 12 phr and 24phr.
出处
《高分子材料科学与工程》
EI
CAS
CSCD
北大核心
2013年第5期92-95,99,共5页
Polymer Materials Science & Engineering
基金
国家科技部科研院所技术开发研究专项资金资助项目(2012EG111217)
关键词
氯磺化聚乙烯
微观结构
压缩应力应变
发泡剂
开孔率
chlorosulfonated polyethylene rubber
microstructure
compression stress-strain
foaming agents
opencell percentage
