乙酸-乙酸乙烯酯橡胶/聚乳酸共混体系的发泡及阻尼性能  

Foaming and damping properties of ethylene-vinyl acetate copolymer / polylactic acid foams

作　　者：贾凌雁[1] 史新妍[1] 

机构地区：[1]青岛科技大学橡塑材料与工程教育部重点实验室/山东省橡塑材料与工程重点实验室,山东青岛266042

出　　处：《合成橡胶工业》2015年第2期126-131,共6页China Synthetic Rubber Industry

基　　金：国家自然科学基金资助项目(51273101);山东省高校科技计划资助项目(J 12 LA 14)

摘　　要：以乙烯-乙酸乙烯酯橡胶(EVM)/聚乳酸(PLA)共混物为基体材料,过氧化二异丙苯(DCP)为硫化剂、偶氮二甲酰胺(AC)为发泡剂,经模压发泡制备橡塑共混发泡材料,用扫描电子显微镜观察材料的泡孔结构及泡孔尺寸分布,采用动态黏弹谱仪对发泡材料的阻尼性能进行研究,考察了AC和DCP用量、发泡时间及白炭黑用量对EVM/PLA发泡材料泡孔结构及阻尼性能的影响。结果表明,随着AC用量的增加,材料的泡孔数目增多但孔径相差不大,阻尼性能也无明显变化,在AC用量为4份时材料的阻尼性能较好;随着DCP用量的增加,材料的泡孔尺寸略有减小,阻尼性能变化不大,DCP用量为5份时材料的阻尼性能较好;随着发泡时间的延长,泡孔尺寸逐渐减小,阻尼性能逐渐提高,发泡时间为5 min时,泡孔孔径与损耗因子均出现突变;填料用量增加,泡孔孔径减小,发泡材料整体损耗因子上升。With ethylene-vinyl acetate copolymer（ EVM） /polylactic acid（ PLA） blends as matrix,dicumyl peroxide（ DCP） as curing agent and azodicarbonamide（ AC） as foaming agent,the EVM / PLA foams were prepared by molding.The cell structure and cell diameter distribution of the foams were observed by scanning electron microscope,and the damping properties were studied by dynamic mechanic analyzer.The effects of AC,DCP and silica contents and foaming time on cell structure and damping properties of the foams were investigated.The results showed that the number of cell increased,the cell diameter and the damping properties of the foams had no evident change with increasing AC content,and the damping properties was better at 4 phr AC.The cell diameter decreased slightly and damping properties changed little with the increase of DCP,and the damping properties was better at 5 phr DCP.The cell diameter decreased and damping properties increased with increasing foaming time,and the cell diameter and loss factor changed dramatically at foaming time 5 min.The cell diameter decreased and the loss factor increased with the increase of silica amount.

关 键 词：乙烯-乙酸乙烯酯橡胶 聚乳酸 发泡材料 泡孔结构 损耗因子 阻尼性能 

分 类 号：TQ330.1[化学工程—橡胶工业]