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Direct polycondensation of carbon dioxide with xylylene glycols: a new method for the synthesis of polycarbonates
Author(s) -
Kadokawa Junichi,
Habu Hideyuki,
Fukamachi Shinji,
Karasu Masa,
Tagaya Hideyuki,
Chiba Koji
Publication year - 1998
Publication title -
macromolecular rapid communications
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.348
H-Index - 154
eISSN - 1521-3927
pISSN - 1022-1336
DOI - 10.1002/(sici)1521-3927(19981201)19:12<657::aid-marc657>3.0.co;2-r
Subject(s) - condensation polymer , xylylene , pentaerythritol , polymer chemistry , polycarbonate , yield (engineering) , chemistry , carbon 13 nmr , polymerization , dimethylformamide , polymer , organic chemistry , carbon fibers , carbon dioxide , materials science , solvent , fire retardant , composite number , metallurgy , composite material
This communication describes the direct polycondensation of carbon dioxide with p ‐ and m ‐xylylene glycols using the system trisubstituted phosphine/carbon tetrahalide/base as a condensing agent. The polymerization reaction of carbon dioxide with p ‐xylylene glycol was carried out in the presence of the condensing agent in N , N ‐dimethylformamide. The yield was at most 81.0% obtained by using the condensing agent tributylphosphine/carbon tetrabromide/ N ‐cyclohexyl‐ N ′, N ′, N ″, N ″‐tetramethylguanidine (CyTMG). The structure of the product was determined by means of 1 H NMR, 13 C NMR, and IR spectroscopy to be that of a polycarbonate. The molecular weight was estimated to be ca. 1 000–2 000 by 1 H NMR analyses.