ISSN:
0025-116X
Keywords:
Chemistry
;
Polymer and Materials Science
Source:
Wiley InterScience Backfile Collection 1832-2000
Topics:
Chemistry and Pharmacology
,
Physics
Notes:
A series of rigid rod-like polyspiroacetals bearing flexible side chains was prepared by interfacial polycondensation of 4,4′-(2,4,8,10-tetraoxaspiro[5,5]undecane-3,9-diyl)diphenol with 2,5-dialkoxy-substituted terephthaloyl dichlorides. The majority of these polymers were soluble in polar solvents like tetrahydrofuran (THF), dimethylformamide (DMF), CHCl3, phenol/CCl4 (1 : 1 by vol.) mixtures, etc. The molecular weights ranged from 7 600 to 15 000 and the melting temperature from 182 to 228°C. Both of the above values decreased with increasing length of the side chains. The TG curves revealed 5% weight loss at 350-370°C under N2 gas atmosphere. Wide-angle X-ray diffractograms showed that all of the polymers have considerable crystallinity at room temperature.
Additional Material:
7 Ill.
Type of Medium:
Electronic Resource
URL:
http://dx.doi.org/10.1002/macp.1991.021920502
