Journal
FRONTIERS OF MATERIALS SCIENCE
Volume 5, Issue 4, Pages 388-400Publisher
HIGHER EDUCATION PRESS
DOI: 10.1007/s11706-011-0152-2
Keywords
poly(vinylidene fluoride); poly(methyl methacrylate); blend film; crystallization
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Funding
- National Natural Science Foundation of China [21072221]
- President Fund of Graduate University of CAS [095101CY00]
- State Key Laboratory of Environmental Chemistry and Ecotoxicology, Research Center for Eco-Environmental Sciences, Chinese Academy of Sciences [KF2008-04]
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The crystallization modification of poly(vinylidene fluoride) (PVDF) was investigated for the blend films of PVDF and poly(methyl methacrylate) (PMMA). The mass crystallinity (X-c) and further, the beta-phase content (F-(beta))of PVDF, were studied for the asprepared blend films with different mass ratios. In addition, the variations of X-c and F-(beta) were systematically probed once the PMMA component was removed from the related blend systems. DSC, FTIR and XRD measurements all indicated that 1)X-c, F-(beta) and even the content of alpha-phase (F-(alpha)) decreased with the addition of PMMA; 2) with the extraction of PMMA, both X-c and F-(beta) increased while F(a) decreased. It is worth noting that the increase of X-c and F-(beta) depended on the relative amount of extracted PMMA (EPMMA), i.e., the more PMMA was removed, the more.c and F-(beta) 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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