聚苯乙烯/交联丙烯酸甲酯共混物的制备及其发泡性能研究  

Study on Preparation and Foaming Properties of Polystyrene/Cross‑linked PMA Blends

作　　者：唐娅娥 刘本刚 TANG Ya’e;LIU Bengang(China Plastics Processing Industry Association,Beijing 100021,China;Hebei Wuzhou Kaiyuan Environmental Protection&New Material Co,Ltd,Cangzhou 061108,China)

机构地区：[1]中国塑料加工工业协会,北京100021 [2]河北五洲开元环保新材料有限公司,河北沧州061108

出　　处：《中国塑料》2020年第6期45-51,共7页China Plastics

摘　　要：将聚苯乙烯(PS)颗粒溶解到二乙烯基苯(DVB)、丙烯酸甲酯(MA)与偶氮二异丁腈(AIBN)的混合物中,通过加热引发MA聚合,获得PS/交联PMA共混物,采用釜压法制备了PS/交联PMA共混物泡沫。采用全自动视频光学接触角测试仪、差示扫描量热仪、傅里叶变换红外光谱仪、动态力学分析仪对PS/交联PMA共混物的结构和性能进行了表征,并通过扫描电子显微镜对PS/交联PMA共混物泡沫的结构进行了表征。结果表明,交联PMA的引入能提高体系的成核效率,随着MA用量的增加,PS/交联PMA共混物的接触角从PS的100.5°降至86.1°;当MA的用量为9.6份(质量份,下同)时,PS/交联PMA共混物的泡孔尺寸主要分布在40~60μm之间,泡孔尺寸分布明显变窄,泡孔密度达到了1.2×10^8个/cm^3。The blends of polystyrene(PS)and cross-linked poly(methyl acrylate)(PMA)were prepared by dissolving PS particles in a mixture of divinylbenzene,methyl acrylate(MA)and azobisisobutyronitrileand then initiating the polymerization of MA.The resulting blends were used to prepare a series of blend foams by an autoclave method.The structure and properties of PS/cross-linked PMA blends were characterized by a contact angle tester,differential scanning calorimeter analyzer,Fourier-transform infrared spectrometer and dynamic mechanics analyzer,and the structure of the blend foams was investigated by scanning electron microscopy.The result indicated that the introduction of cross-linked PMA improved the nucleation efficiency of the foaming system,and the contact angle of the blends decreased from 100.5°to 86.1°with an increase of MA content.The blend foams exhibited a narrow distribution in bubble size at the MA amount of 9.6 phr.Their cell size was distributed in the range of 40~60μm,and their cell density reached 1.2×10^8 every square centimeter.

关 键 词：聚苯乙烯 丙烯酸甲酯 共混物 发泡行为 

分 类 号：TQ328.4[化学工程—合成树脂塑料工业]