Modification on crystallization of poly(vinylidene fluoride) (PVDF) by solvent extraction of poly(methyl methacrylate) (PMMA) in PVDF/PMMA blends |
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| Authors: | Jing SUN Lu YAO Qiao-Ling ZHAO Jin HUANG Rui SONG Zhi MA Ling-Hao HE Wei HUANG Yong-Mei HAO |
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| Affiliation: | 1. Key Laboratory of Surface and Interface Sciences of Henan Province, Zhengzhou University of Light Industry, Zhengzhou 450005, China; 2. Shanghai Institute of Organic Chemistry, Chinese Academy of Sciences, Shanghai 200032, China; 3. College of Chemistry and Chemical Engineering, Graduate University of Chinese Academy of Sciences, Beijing 100049, China; 4. Laboratory of Advanced Polymer Materials, Institute of Chemistry, Chinese Academy of Sciences, Beijing 100080, China |
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| Abstract: | The crystallization modification of poly(vinylidene fluoride) (PVDF) was investigated for the blend films of PVDF and poly(methyl methacrylate) (PMMA). The mass crystallinity (χc) and further, the β-phase content (F(β)) of PVDF, were studied for the as-prepared blend films with different mass ratios. In addition, the variations of χc and F(β) were systematically probed once the PMMA component was removed from the related blend systems. DSC, FTIR and XRD measurements all indicated that 1) χc, F(β) and even the content of α-phase (F(α)) decreased with the addition of PMMA; 2) with the extraction of PMMA, both χc and F(β) increased while F(α) decreased. It is worth noting that the increase of χc and F(β) depended on the relative amount of extracted PMMA (EPMMA), i.e., the more PMMA was removed, the more χc and F(β) increased. These results reveal the hindrance effect from the PMMA constituent to the crystallization of PVDF, and consequently, this restriction would be released when the PMMA was extracted. |
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| Keywords: | poly(vinylidene fluoride) poly(methyl methacrylate) blend film crystallization |
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