基于超临界CO_2间歇法制备超轻TPU颗粒的研究  

Preparation of Ultra-light Micro Foam TPU Particles by Supercritical CO_2 Batch Method

作　　者：张艳娜[1] 秦柳[2,3] 张聪 陈承涛 杨卫民[4] 

机构地区：[1]青岛科技大学机电工程学院,山东青岛266061 [2]宁波格林美孚新材料科技有限公司,浙江宁波315318 [3]湖北民族学院,湖北恩施445000 [4]北京化工大学机电工程学院,北京100029

出　　处：《中国塑料》2016年第1期56-60,共5页China Plastics

摘　　要：采用超临界流体间歇式微发泡技术制备了超轻热塑性聚氨酯弹性体(TPU)颗粒,利用扫描电子显微镜等研究了发泡温度、饱和时间及饱和压力对制备超轻TPU颗粒密度和性能的影响。结果表明,发泡温度和饱和压力是影响颗粒泡孔结构分布和粒料性能的主要因素;当饱和压力为11 MPa、发泡温度为145℃时,所得的超轻TPU颗粒密度较小、粒径较大,其内部泡孔数量较多,泡孔结构分布均匀。This article introduced the preparation of uhra-light TPU granules through batch foaming by supercritical fluid. The effect of foaming temperature, saturation time, and saturation pressure on the density and performance of TPU granules was studied. It showed that the foaming temperature and pressure constituted the main factors influencing the particle cell structure distribution. When the saturation pressure and temperature were 11 MPa and 145 ℃, respectively, the foamed TPU granules possessed low density, big size, large and uniform porosity,

关 键 词：热塑性聚氨酯弹性体 超临界流体 微发泡 发泡温度 饱和压力 

分 类 号：TQ334[化学工程—橡胶工业]