ISSN:
0098-1273
Keywords:
Physics
;
Polymer and Materials Science
Source:
Wiley InterScience Backfile Collection 1832-2000
Topics:
Chemistry and Pharmacology
,
Physics
Notes:
Data obtained by hot-stage cross-polarized light microscopy and thermogravimetric analysis were used to plot a transition map for the poly(n-alkylisocyanate) homologous family. Most members had a low-temperature transition (or relaxation). The middle members of the family, with side-chain length of 4 ≤ n 〈 13 carbon atoms, exhibit a mesomorphic range of temperatures. Members with sidechains of n ≥ 13 in length, go directly from the low-temperature transition to the melting point without passage through a liquid crystalline state. A transition map for two homopolymers and a series of their copolymers, poly[x mol% n-butyl + (100-x)mol% p-anisole-3-propyl]isocyanate, was also prepared. The range of mesomorphicity as a function of composition and temperature is clearly indicated.
Additional Material:
3 Ill.
Type of Medium:
Electronic Resource
URL:
http://dx.doi.org/10.1002/pol.1980.180180611
