Studies on morphology, mechanical, thermal, and dynamic mechanical behavior of extrusion blended polypropylene and thermotropic liquid crystalline polymer in presence of compatibilizer
Studies on morphology, mechanical, thermal, and dynamic mechanical behavior of extrusion blended polypropylene and thermotropic liquid crystalline polymer in presence of compatibilizer
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增容剂存在下挤出共混聚丙烯和热致液晶聚合物的形态、机械、热和动态机械行为的研究
DOI：
10.1002/app.28988
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发表时间：
2009
影响因子：
3
通讯作者：
D. Chakraborty
中科院分区：
文献类型：
--
作者：
P. Mandal;D. Chakraborty
在单螺杆挤出机中，以2%的乙烯-丙烯酸共聚物（EAA）为增容剂，将热致性液晶聚合物Vectra B-950与聚丙烯（PP）以不同比例熔融共混。这样的增容共混物的机械性能进行了评价和比较方面的杨氏模量，极限拉伸强度，断裂伸长率，和韧性的纯PP。用偏光显微镜（PLM）和扫描电子显微镜（SEM）研究其形貌.用差示扫描量热仪（DSC）对共混物进行了热分析，用动态力学分析仪（DMA）对共混物和纯PP的动态力学性能进行了研究。力学分析（拉伸性能）的增容共混物显示，在模量和极限拉伸强度（UTS）的PP基体与2-10%的LCP掺入的改善。增容PP/LCP共混物中细纤形态的发展对力学性能有很大的影响。差示扫描量热仪（DSC）的研究表明，相对于纯PP的共混物的结晶熔融温度没有显着的变化。然而，观察到共混物的软化范围比PP的软化范围增加。© 2008 Wiley Periodicals，Inc.应用聚合物科学杂志，2009年
Polypropylene was melt blended in a single screw extruder with thermo tropic Vectra B-950 liquid crystalline polymer (copolyester amide) in different proportions in presence of 2% of EAA, ethylene-acrylic acid copolymer (based on PP) as a compatibilizer. The mechanical properties of such compatibilized blends were evaluated and compared in respect of their Young's Modulii, Ultimate tensile strength, percent elongation at break, and toughness to those of Pure PP. The Morphology was studied by using a polarizing light microscope (PLM) and Scanning electron microscope (SEM). The Thermal characterization of these blends were carried out by differential scanning calorimeter (DSC).The mechanical properties under dynamic conditions of such compatibilized blends and pure PP were studied by dynamic mechanical analyzer (DMA). Mechanical analysis (Tensile properties) of the compatibilized blends displayed improvements in Modulii and ultimate tensile strength (UTS) of PP matrix with the incorporation of 2–10% of LCP incorporation. The development of fine fibrillar morphology in the compatibilized PP/LCP blends had large influence on the mechanical properties. Differential scanning calorimeter (DSC) studies indicated no remarkable changes in the crystalline melting temperature of the blends with respect to that of pure PP. However, an increase in the softening range of the blends over that of PP was observed. © 2008 Wiley Periodicals, Inc. J Appl Polym Sci, 2009