DSC studies on the transitions in poly(vinylidenefluoride) and some related copolymers

• DOI: 10.1007/bf00258030
• Publication Date: 2004-09-27T02:00:10Z
• Authors: C. Leonard; J.L. Halary; L. Monnerie; F. Micheron
• Keywords: 01 natural sciences; 0104 chemical sciences

The transition properties of poly(vinylidenefluoride) and of some related copolymers, either semicrystalline or amorphous, were studied by differential scanning calorimetry in the temperature range from 200 K to 500 K. The amorphous copolymers exhibit a single glass transition. Melting endotherms and a lower glass transition [Tg(L)] are systematically observed in the semi-crystalline materials as well as an upper glass transition [Tg(U)] for certain thermal and mechanical histories of the samples. Conditions for [Tg(U)] existence are related to solid state morphology of the macromolecules and loop length in the folded chains.