Spectroscopic and thermal studies of PS/PVAc blends

被引：56
作者：
Elashmawi, I. S. [1 ]
Hakeem, N. A. [1 ]
Abdelrazek, E. M. [2 ]
机构：
[1] Natl Res Ctr, Dept Spect, Div Phys, Cairo, Egypt
[2] Mansoura Univ, Fac Sci, Dept Phys, Mansoura 35516, Egypt
来源：
PHYSICA B-CONDENSED MATTER | 2008年 / 403卷 / 19-20期
关键词：
Polymer blends; Miscibility; FT-IR; X-ray diffraction; UV-visible; DSC; Optical energy gap;
D O I：
10.1016/j.physb.2008.05.024
中图分类号：
O469 [凝聚态物理学];
学科分类号：
070205 ;
摘要：
Polystyrene and polyvinyl acetate (PS/PVAc) films were blended with different contents using casting method. The effect of PS content on PVAc blends was investigated by Fourier transform infrared (FT-IR), X-ray diffraction (XRD), Ultra violet and visible studies (UV/VIS), differential scanning calorimetry (DSC) and thermogravimetric analysis (TGA). Significant changes in FT-IR, XRD and DSC analysis are observed which reveals an interactions between the two polymers and PS/PVAc blends had good or certain miscibility. XRD scans show some changes in the intensity and the height of the amorphous halos with increased PS. UV/VIS analysis revealed that the optical band gap decreases with increasing content of PS from 5 to 4.11 eV. A single glass transition temperature for each blend was observed, this DSC results supported that the miscibility existed in the blend. The apparent activation energy (E) of the blends was evaluated using TGA analysis. The value of E was increased with the increase of PS content. (c) 2008 Elsevier B.V. All rights reserved.
引用
收藏
页码：3547 / 3552
页数：6
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