Nonisothermal Crystallization Behaviors of Nanocomposites Prepared by In Situ Polymerization of High-Density Polyethylene on Multiwalled Carbon Nanotubes

被引:60
作者
Kim, Jihun [1 ,2 ]
Kwak, Soonjong [3 ]
Hong, Soon Man [3 ]
Lee, Jae Rock [4 ]
Takahara, Atsushi [5 ]
Seo, Yongsok [1 ,2 ]
机构
[1] Seoul Natl Univ, Coll Engn, ITRC, Seoul 151744, South Korea
[2] Seoul Natl Univ, Coll Engn, Sch Mat Sci & Engn, Seoul 151744, South Korea
[3] Korea Inst Sci & Technol, Polymer Hybrid Res Ctr, Seoul 136791, South Korea
[4] Korea Res Inst Chem Technol, Energy Mat Res Ctr, Taejon 305600, South Korea
[5] Kyushu Univ, Inst Mat Chem & Engn, Nishi Ku, Fukuoka 8190395, Japan
基金
新加坡国家研究基金会;
关键词
NANOTUBE/POLYETHYLENE NANOCOMPOSITES; ELECTRICAL-CONDUCTIVITY; MORPHOLOGY; KINETICS; COMPOSITES; NUCLEATION;
D O I
10.1021/ma102036h
中图分类号
O63 [高分子化学(高聚物)];
学科分类号
070305 ; 080501 ; 081704 ;
摘要
Thermal properties and nonisothermal crystallization kinetics of polyolefin nanocomposites (high-density polyethylene/multiwalled carbon nanotubes) were characterized by differential scanning calorimetry and thermogravimetric analysis In situ metallocence polymerization was used to prepare nanocomposites of multiwalled carbon nanotubes (MWCNTs) and high-density polyethylene (HDPE) This polymerization method consists of attaching a metallocene catalyst complex onto the surface of the MWCNTs followed by surface initiated polymerization to generate polymer brushes on the surface A kinetic equation for the nonisothermal crystallization was employed to analyze the crystallization characteristics of the nanocomposites The Avramic exponent, n, can be reasonably well determined from the nonisothermal crystallization exotherm The polarized optical microscopy showed that neat polyethylene possessed a well-developed spherulite morphology, whereas the nanocomposites displayed elongated entities that subsequently developed as bundlelike entities Nonisothermal analysis implicitly provides clues about the morphological development history and HDPE molecular ordering around the carbon nanotubes
引用
收藏
页码:10545 / 10553
页数:9
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