Thermoplastic polyurethane/polypropylene blends based on novel vane extruder: A study of morphology and mechanical properties
Thermoplastic polyurethane/polypropylene blends based on novel vane extruder: A study of morphology and mechanical properties
复制标题
DOI：
10.1002/pen.23598
复制
发表时间：
2014-03
影响因子：
3.2
通讯作者：
Shikui Jia;J. Qu;Weifeng Liu;Chengran Wu;Rongyuan Chen;Shufeng Zhai;Z. Huang
中科院分区：
文献类型：
--
作者：
Shikui Jia;J. Qu;Weifeng Liu;Chengran Wu;Rongyuan Chen;Shufeng Zhai;Z. Huang
采用自制的产生全局动态拉伸流动的叶片挤出机（VE）和产生剪切流动的传统双螺杆挤出机（TSE）制备了不同重量比的热塑性聚氨酯（TPU）与聚丙烯（PP）共混物。研究了共混物的力学性能、相形态、热行为和球晶尺寸，以比较不同的加工工艺。用VE制备的样品具有比用TSE制备的样品更优越的上级机械性能。扫描电子显微镜（SEM）结果表明，TPU/PP共混物（<60wt%TPU）在VE中的拉伸流动改善了纤维形态。差示扫描量热曲线表明，动态拉伸流动可以改善TPU/PP共混物的相容性。U形球晶尺寸曲线表示从偏光显微镜观察到的球晶尺寸的变化。联锁球晶也揭示了TPU/PP共混物在拉伸流动下的表观部分相容性。Polym.工程索引，54：716 - 724，2014.© 2013年塑料工程师协会
Thermoplastic polyurethane (TPU) polypropylene (PP) blends of different weight ratios were prepared with a self-made vane extruder (VE), which generates global dynamic elongational flow, and a traditional twin-screw extruder (TSE), which generates shear flow. The mechanical properties, phase morphology, thermal behavior, and spherulite size of the blends were investigated to compare the different processing techniques. Samples prepared with a VE had superior mechanical properties than the samples prepared with a TSE. Scanning emission micrographs show that the fiber morphology of the TPU/PP blends (<60 wt% TPU) was improved by elongational flow in VE. Differential scanning calorimetry curves indicate that a dynamical elongational flow could improve the miscibility of the TPU/PP blends. The U-shaped spherulite size curve indicates the changes in the spherulite size, as observed from a polarization microscope. Interlocked spherulites also reveal the apparent partial miscibility of the TPU/PP blends under elongational flow. POLYM. ENG. SCI., 54:716–724, 2014. © 2013 Society of Plastics Engineers