Title of article :
Non-isothermal Crystallization Kinetics and Nucleation Activity of Filler in Polypropylene/Microcrystalline Cellulose Composites
Author/Authors :
ZHU, XIU LING Donghua Universi ty - College of Materials Science and Enginee ring - State Key L aboratory for Modification of Chemical Fiber and Polymer Material, CHINA , WANG, CHAO SHENG Donghua Universi ty - College of Materials Science and Enginee ring - State Key L aboratory for Modification of Chemical Fiber and Polymer Material, CHINA , WANG, BIAO Donghua Universi ty - College of Materials Science and Enginee ring - State Key L aboratory for Modification of Chemical Fiber and Polymer Material, CHINA , WANG, HUA PING Donghua Universi ty - College of Materials Science and Enginee ring - State Key L aboratory for Modification of Chemical Fiber and Polymer Material, CHINA
Abstract :
The non-isothermal crystallization kinetics of isotactic polypropylene (iPP) and iPP/microcrystalline cellulose 1 (MCC1) (hydrolyzed by HCI) and iPPI microcrystalline cellulose 2 (MCC2) (hydrolyzed by H2S0 4) composites were investigated by differential scanning calor imetry techniqye (DSC) with various cooling rates . The Avrami , Ozawa , and Mo equations were appl ied to describe the non-isothermal crystallization kinetics and to determine the crystallization parameters of the composites. The results show that the values of t1l2 for iPP/MCCs compos ites are lower than that for iPP. The value of F(T) systematically increases with increasing relative degree of crystallinity. Non-isothermal crystallizations of iPP/MCCs composites correspond to tridimensional growth with heterogeneous nucleation and MCCs acted as nucleating agent in iPP matrix. The addition of microcrystalline cellulose has greatly reduced the spherulitic size of iPP.
Keywords :
polypropylene , microcrystalline cellulose , non , isothermal crystallization , nucleating agent , spherulite size
Journal title :
Iranian Polymer Journal
Journal title :
Iranian Polymer Journal
