【作者】 张广成； 陈挺； 刘铁民； 张翠； 赵玺浩；

【Author】 Zhang Guangcheng, Chen Ting, Liu Tiemin, Zhang Cui, Zhao Xihao Applied Chemistry Department, Northwestern Polytechnical University, Xi’an, Shannxi, 710072

【机构】 西北工业大学理学院应用化学系；

【摘要】 <正>泡沫塑料的性能取决于树脂基体的性能和泡孔结构。树脂基体的性能越高,其相应的泡沫塑料性能也越高:泡沫塑料闭孔率越高、泡孔平均尺寸越小、基体树脂在泡壁上的体积分率越高,其力学强度和模量也越高。在偶氮二异丁腈(AIBN)的引发下,先在低温(40～60℃)下制备含有发泡剂的丙烯腈 (AN)／甲基丙酸酸(MAA)／丙烯酰胺(AM)三元可发泡共聚物(反应示意式1),然后将可发更多还原

【Abstract】 Acrylonitrile (AN) /Methacrylic acid (MAA) /Acryloamide (AM) copolymer foam plastic was prepared via the means of two-step expansion. At the same time its bubble structure, mechanical and heat-resistant properties were investigated in this paper. Results reveal that the foam bubble is composed of polyhedrons, which are constructed by many planar bubble walls, and its closed-cell ratio is very high. With the density rising, bubble ridges become thicker and thicker, and its volume fraction increases, while the volume fraction of bubble wall decreases. The foaming multiple and bubble aperture are basically consistent in three-dimensional directions, so the foam plastic is isotropic. All these structural characters, which include a lot of imide rings, trapezium, crosslinking structures and fine bubble structure, make the foam plastic possess excellent mechanical and heat-resistant properties.更多还原