| 摘要 |
PROBLEM TO BE SOLVED: To provide a PVDF (polyvinylidene fluoride) homopolymer or copolymer having a nontransferable chain fraction excellent in impact strength without adding a plasticizer and an enhancer whereby a sheet, a film, a tube, a rod and a centrifuge pump component and a container or the like is produced. SOLUTION: (1) The chain fraction having a significant high molar mass weight which does not dissolve in a general solvent of PVDF such as DMF (dimethylformamide), DMSO (dimethyl sulfoxide) and NMP (N- methylpyrrolidone) is contained and a polymer containing this high molecular weight chain fraction has a dynamic viscosity of 50k poise or more at 230 deg.C and a shear rate of 100 S<-1> and (2) A size of a spherulite is 0.5-4μm.
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