摘要
采用双螺杆挤出机制备了超高韧性聚甲醛(POM)/热塑性聚氨酯弹性体(TPU)共混物,通过力学测试和扫描电子显微镜(SEM)等手段研究了树脂流动性、TPU种类对POM/TPU共混体系性能及结构的影响。结果表明:当TPU含量50%时,配合不同粘度的POM树脂,可使共混体系达到超高的冲击强度,材料在拉伸过程出现应变-硬化过程,POM和TPU在共混体系中呈现两相双连续结构。相比于聚酯型TPU,使用聚醚型TPU制备的共混体系具有更高的低温缺口冲击强度。
The ultra-high toughness POM/TPU blends were prepared by twin screw extruder.The effects of matrix resin fluidity and TPU types on POM/TPU properties and structure were studied by mechanical test and scanning electron microscopy(SEM).The results showed that when the content of TPU was 50%,the ultra-high impact strength of POM/TPU blends can be obtained by using POM resins with different viscosities.The strain-hardening process occurred in the tensile test process,and a two-phase continuous structure of POM and TPU appeared in the blends.Compared with TPU of polyester structure,the blends prepared with TPU of polyether structure had higher notch impact strength at low temperature.
作者
陈锋
曹绍强
叶坤豪
禹权
丁超
CHEN Feng;CAO Shao-qiang;YE Kun-hao;YU Quan;DING Chao(Plastic Modification and Processing of Product Research and Development Center,National Engineering Laboratory,Kingfa Science and Technology Co.,Ltd.,Guangdong Guangzhou 510520,China)
出处
《广州化工》
CAS
2019年第6期46-48,共3页
GuangZhou Chemical Industry
关键词
聚甲醛
热塑性聚氨酯弹性体
冲击强度
相态结构
polyoxymethylene
thermoplastic polyurethane elastomer
impact strength
phase structure
