The Effect of Molecular Structure of Linear and Long- Chain Branched Polypropylene Blends on Their Thermal and Rheological Properties

Isotactic polypropylene has many desirable physical properties. However, its low melt strength restricted its application in process which elongational flow is dominant[1]. Introducing long branches into linear polypropylene (LPP) is one of the most effective approaches to enhance meltstrength of polypropylene. Because of the higher cost of LCBPP, there is a growing interest in using blends of linear and long-chain branched polypropylene in industries [2]. In thisstudy the effect of molecular structure on thermal and rheologicalproperties of blends of L-PP and LCB-PP are investigated