Abstract
AbstractDielectric, x‐ray diffraction, density, thermomechanical, and thermogravimetric studies on polyacrylonitrile (PAN), poly[acrylonitrile‐(2 methacryloyloxy)ethoxytrimethylsilane] [poly(AN‐2MAETMS)], and poly[acrylonitrile‐(2 methacryloyloxy)propoxytrimethylsilene] [poly(AN‐2MAPTMS)] copolymers have been carried out for investigating their structure. The glass transition temperature as indicated from the dielectric and thermomechanical analysis data are lower for the copolymers as compared to PAN. Crystallinity is influenced by the introduction of the silylated acrylic comonomer units but the crystalline lattice remains similar to that of PAN. The changes obseved in the various properties of these coplymers clearly suggest a more closely packed structure of poly(AN‐2MAETMS) than poly(AN‐2MAPTMS), and the uninterrupted PAN sequences are longer in the former. Thermal stability of copolymers has also been investigated.
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