Isothermal Crystallization Kinetics and Melting Behavior of Modified High-Density Polyethylene/Barium Sulfate Nanocomposites
文献类型： 外文期刊
作者： Chen, Xiaolei 1 ; Shi, Jiangao 1 ; Wang, Lei 1 ; Shi, Hang 1 ; Liu, Yongli 1 ; Wang, Lumin 1 ;
作者机构： 1.Chinese Acad Fishery Sci, E China Sea Fisheries Res Inst, Key & Open Lab Marine & Estuarine Fisheries, Minist Agr, Shanghai 200090, Peoples R China
期刊名称：POLYMER COMPOSITES （ 影响因子：3.171； 五年影响因子：2.877 ）
ISSN： 0272-8397
年卷期： 2011 年 32 卷 2 期
页码：
收录情况： SCI
摘要： The melting/crystallization behavior and isothermal crystallization kinetics of high-density polyethylene (HDPE)/barium sulfate (BaSO4) nanocomposites were studied with differential scanning calorimetry (DSC). The isothermal crystallization kinetics of the neat HDPE and nanocomposites was described with the Avrami equation. For neat HDPE and HDPE/BaSO4 nanocomposites, the values of n ranges from 1.7 to 2.0. Values of the Avrami exponent indicated that crystallization nucleation of the nanocomposites is two-dimensional diffusion-controlled crystal growth. The multiple melting behaviors were found on DSC scan after isothermal crystallization process. The multiple endotherms could be attributed to melting of the recrystallized materials or the secondary lamellae caused during different crystallization processes. Adding the BaSO4 nanoparticles increased the equilibrium melting temperature of HDPE in the nanocomposites. Surface free energy of HDPE chain folding for crystallization of HDPE/BaSO4 nanocomposites was lower than that of neat HDPE, confirming the heterogeneous nucleation effect of BaSO4. POLYM. COMPOS., 32:177-184, 2011. (C) 2010 Society of Plastics Engineers
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