Study of micro-phase separation of two polystyrene-based copolymer mixture using the combination of PALS and FT-IR
✍ Scribed by Z.Y. Jiang; X.Q. Jiang; Y.X. Yang; Y.J. Huang; H.B. Huang; Y.F. Hsia
- Publisher
- Elsevier Science
- Year
- 2005
- Tongue
- English
- Weight
- 153 KB
- Volume
- 229
- Category
- Article
- ISSN
- 0168-583X
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✦ Synopsis
Positron annihilation lifetime (PAL) spectroscopy, Fourier transform infrared (FT-IR) and differential scanning calorimetry (DSC) have been applied to study the micro-phase separation in the blends of poly(styrene-co-methylmethacrylate) (SMMA) copolymer and poly(styrene-co-maleic anhydride) (SMA) copolymer. The DSC results indicate that the SMA/SMMA blends are miscible and weak intermolecular interactions exist between SMA and SMMA. The strength of intermolecular interactions to some degree exhibits somewhat non-monotonic variation with increasing of SMA component in the blends. The results of PAL measurement present the blend containing 20 wt% SMA is phase-separated in molecular level, which is interpreted by the results of FT-IR analysis. It was concluded that it is helpful to study the miscibility of polymer blends in molecular level by means of PAL method, accompanied with the requisite measurement of DSC and FT-IR.