ISSN:
1436-2449
Source:
Springer Online Journal Archives 1860-2000
Topics:
Chemistry and Pharmacology
,
Mechanical Engineering, Materials Science, Production Engineering, Mining and Metallurgy, Traffic Engineering, Precision Mechanics
,
Physics
Notes:
Summary The synthesis and characterisation of the thermotropic polyester poly[oxy-(1,4-dimethyltetramethylene) oxycarbonyl-3-chloro-1,4-phenyleneoxyterephthaloyloxy-2-chloro-1,4-phenylenecarbonyl] is described, and its thermal behaviour analysed. The effect of asymmetrical substitution in the tetramethylene spacer is analysed and the polymer compared with its non-substituted homologue. Substitution of methylene units at the 1,4 positions in the spacer results in a considerable lowering of the both the transition temperatures and the associated molar enthalpies, and inhibits the formation of three-dimensional order.
Type of Medium:
Electronic Resource
URL:
http://dx.doi.org/10.1007/BF00296157
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