Structures and properties of the compression-molded istactic-polypropylene/talc composites: Effect of cooling and rolling

被引：18
作者：
Gafur, Md Abdul [2 ]
Nasrin, Rahima [1 ]
Mina, Md Forhad [1 ]
Bhuiyan, Md Abu Hashan [1 ]
Tamba, Yukihiro [3 ]
Asano, Tsutomu [4 ]
机构：
[1] Bangladesh Univ Engn & Technol, Dept Phys, Dhaka 1000, Bangladesh
[2] Bangladesh Council Sci & Ind Res, PP & PDC, Dhaka 1205, Bangladesh
[3] Suzuka Natl Coll Technol, Shiroko, Suzuka 5100294, Japan
[4] Shizuoka Univ, Ctr Instrumental Anal, Shizuoka 4228529, Japan
来源：
POLYMER DEGRADATION AND STABILITY | 2010年 / 95卷 / 09期
关键词：
Composites; X-ray diffraction; Lamellar structure; Mechanical properties; Thermal properties; MECHANICAL-BEHAVIOR; TALC; ORIENTATION; CRYSTALLIZATION; MORPHOLOGY;
D O I：
10.1016/j.polymdegradstab.2010.05.001
中图分类号：
O63 [高分子化学（高聚物）];
学科分类号：
070305 ; 080501 ; 081704 ;
摘要：
Talc-loaded isotactic polypropylene (iPP) composites with various contents of talc were fabricated by compression molding, following slow- and fast-cooling processes, to obtain slow-cooled samples (SCS) and fast-cooled samples (FCS), respectively. Lamellar thickness of the a-crystal of iPP in the SCS is observed to be larger than that in the FCS by X-ray diffraction study. Rolled fast-cooled samples (RFCS) were also prepared at 25 degrees C in order to examine the crystal growth of iPP. An epitaxial growth mechanism of the a-crystal of iPP from the talc crystal is proposed. Surface of talc-loaded FCS appears with a smaller particle size than that of talc-loaded SCS and RFCS as observed by a scanning electron microscope. Young's modulus and tangent modulus of FCS are found lower than those of SCS with the addition of talc up to 20 wt% and higher above this concentration, except microhardness which is higher in SCS at all contents of talc. From thermal studies, talc-loaded SCS and FCS are found to show higher melting temperature than the neat samples. Effect of cooling and rolling on the structures and properties of the fabricated composites are elaborately discussed. (C) 2010 Elsevier Ltd. All rights reserved.
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页码：1818 / 1825
页数：8
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