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|Title:||ACID-CATALYZED CYCLODEHYDRATION OF QUINAZOLONE PREPOLYMERS.||Authors:||Chan, Hardy Sze On
|Issue Date:||Sep-1986||Citation:||Chan, Hardy Sze On,Lusty, J.R. (1986-09). ACID-CATALYZED CYCLODEHYDRATION OF QUINAZOLONE PREPOLYMERS.. Journal of macromolecular science. Chemistry A23 (9) : 1057-1078. ScholarBank@NUS Repository.||Abstract:||The effect of p-toluenesulfonic acid and phosphoric acid on the cyclodehydration of quinazolone prepolymers have been investigated. Isothermal weight loss during the curing process was monitored closely to follow the extent of cyclization. The optimum weight loss corresponding to 2 mol water is used as an indication of the formation of a fully cyclized quinazolone structure without concurrent decaroxylation. This can be achieved by incorporating the catalyst at 2 wt% concentration, which permits a lower curing temperature than those previously reported.||Source Title:||Journal of macromolecular science. Chemistry||URI:||http://scholarbank.nus.edu.sg/handle/10635/75516||ISSN:||0022233X|
|Appears in Collections:||Staff Publications|
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