Morphology investigation on high‐pressure crystallized bisphenol‐A polycarbonate/dioctyl phthalate blends |
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| Authors: | Jun Lu Rui Huang Il‐Kwon Oh |
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| Institution: | 1. College of Polymer Materials Science and Engineering, Sichuan University, Chengdu 610065, Sichuan, People's Republic of China;2. School of Mechanical Systems Engineering, Chonnam National University, 300 Yongbong‐Dong, Buk‐Gu, Gwang‐Ju 500‐757, Republic of Korea;3. Rui Huang, College of Polymer Materials Science and Engineering, Sichuan University, Chengdu 610065, Sichuan, People's Republic of China;4. Il‐Kwon Oh, School of Mechanical Systems Engineering, Chonnam National University, 300 Yongbong‐Dong, Buk‐Gu, Gwang‐Ju 500‐757, Republic of Korea |
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| Abstract: | The high‐pressure crystallized bisphenol‐A polycarbonate/dioctyl phthalate (BAPC/DOP) blend samples were investigated using wide‐angle X‐ray diffraction (WAXD), differential scanning calorimetry (DSC) and scanning electron microscopy (SEM). The specimens were prepared in a piston‐cylinder high‐pressure apparatus by varying the temperature, the pressure and the crystallization time for a BAPC/DOP (90/10, wt/wt) blend. The other four specimens were also prepared with different weight ratios of BAPC/DOP. The DSC results showed that the amorphous BAPC could be crystallized in 45 min by the blending with DOP and the subsequent high‐pressure treatment. A wide variety of morphologies of BAPC crystals were disclosed by SEM, including spherulites, spatial dendrites, crystalbars, platelets and regular polygonal crystals of different characteristics. The folded‐chain lamellar crystals were found to be the substructures of these observed BAPC microstructures. The SEM revealed a granular substructure of the lamellae in a low‐crystallinity sample as well, which indicated that the crystallization of BAPC in the multiphase system might possibly agree with the model developed by Strobl. © 2007 Wiley Periodicals, Inc. J Polym Sci Part B: Polym Phys 45: 2715–2728, 2007 |
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| Keywords: | bisphenol‐A polycarbonate blends growth high‐pressure crystallization spherulites |
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