Synthesis and properties of processable rigid polymers containing spiroacetal moieties

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...

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Published in:Die Makromolekulare Chemie 1991-05, Vol.192 (5), p.1033-1040
Main Authors: Lee, Kwang-Sup, Kim, Hyun Min, Rhee, John M., Lee, Soo-Min
Format: Article
Language:English
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Summary: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.
ISSN:0025-116X
0025-116X
DOI:10.1002/macp.1991.021920502