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The crystalline structure and the melting behavior of vinylidene fluoride/vinyl fluoride (VF) copolymers are reexamined. For copolymers containing even a small mole fraction of VF units (≈︁ 12%) a structure similar to the β‐form of poly(vinylidene fluoride) and to the crystalline structure of poly(vinyl fluoride) is stabilized. Combined wide‐angle X‐ray scattering, differential scanning calorimetry and dielectric measurements show that in contrast to other vinylidene fluoride copolymers, no crystal‐crystal transition below the melting region is present.
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Guerra et al. (1989) studied this question.
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