Premium
Mesophase structure of some flexible chain polymers
Author(s) -
Antipov E. M.,
Kulichikhin V. G.,
Platé N. A.
Publication year - 1992
Publication title -
polymer engineering and science
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.503
H-Index - 111
eISSN - 1548-2634
pISSN - 0032-3888
DOI - 10.1002/pen.760321703
Subject(s) - mesophase , mesogen , materials science , differential scanning calorimetry , polymer , polymer chemistry , phase (matter) , chain (unit) , polyethylene , crystallography , polymer science , liquid crystal , composite material , thermodynamics , organic chemistry , liquid crystalline , chemistry , physics , optoelectronics , astronomy
The mesophase structures of some flexible chain polymers, which do not contain mesogenic groups, but are able to form thermodynamically equilibrium mesomorphic states, were studied by means of the X‐ray analysis, the differential scanning calorimetry, and other methods. The mesophase polyethylene in bicomponent polymer blends, mesomorphic ultra‐high molecular weight polyphosphazenes, and membrane polyvinylorganosilanes were investigated. The scheme of polymer phase transitions is discussed. Besides conformational disordering, the step‐by‐step loss of different levels of the positional order (i.e. the multiple‐step character of melting) of flexible, semiflexible, and stiff chain polymers is deduced and illustrated by examples from the authors' experience and from the literature.