Enhanced thermal properties of poly(ethylene tetrasulfide) via expanded graphite incorporation by in situ polymerization method

被引：28
作者：
Allahbakhsh, Ahmad [1 ]
Sheydaei, Milad [1 ]
Mazinani, Saeedeh [2 ]
Kalaee, Mohammadreza [1 ]
机构：
[1] Islamic Azad Univ, Dept Polymer Engn, South Tehran Branch, Tehran 1777613651, Iran
[2] Amirkabir Univ Technol, Amirkabir Nanotechnol Res Inst ANTRI, Tehran, Iran
来源：
HIGH PERFORMANCE POLYMERS | 2013年 / 25卷 / 05期
关键词：
Expanded graphite; nanocomposites; polysulfide; thermal properties; BIPOLAR PLATES; NANOCOMPOSITES; COMPOSITE; ELECTROLYTE; KINETICS;
D O I：
10.1177/0954008313476314
中图分类号：
O63 [高分子化学（高聚物）];
学科分类号：
070305 ; 080501 ; 081704 ;
摘要：
In this study, a novel poly(ethylene tetrasulfide) (PETS)/expanded graphite (EG) nanocomposite with 40 degrees C improvement in melting point is prepared via in situ polymerization technique. The morphology, chemical characteristics and the structural behavior of nanocomposites are characterized using scanning electron microscopy, Fourier transform infrared spectroscopy and x-ray diffraction (XRD) techniques, respectively. XRD observations show about 0.1nm increase in d-spacing of PETS crystals in the presence of 2wt% EG in nanocomposite. This behavior could be related to the intercalation of polysulfide macromolecules in the interlayer structure of EG sheets. Furthermore, the thermal properties of nanocomposites are investigated using differential scanning calorimetry and thermogravimetric analysis techniques. The thermal degradation temperature of nanocomposite containing 2wt% graphite shows an improvement of about 10 degrees C compared to unfilled polysulfide. Moreover, the chemical resistance of nanocomposites in different common solvents increases in the presence of EG, which could be accounted as a clear proof of interconnections for EG and macromolecular structure of the polymer.
引用
收藏
页码：576 / 583
页数：8
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