Roles of Water Molecules Involved in Aromatic Polyester as Hydorophobic Polymer

Commercial optical resins on their moldings have been required to be dried in their water contents, 0.01∼0.05 wt%, in hot airflow. However, the structure of wet resins and the location and role of water molecules in them remain unknown. Polymerization of Bisphenol A and iso- and tere-phthaloyl chlor...

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Published inKOBUNSHI RONBUNSHU Vol. 69; no. 9; pp. 511 - 519
Main Authors YAMAZAKI, Takayoshi, MAWATARI, Yasuteru, NAMIKAWA, Yoshitada, NAKANO, Hiroto, TABATA, Masayoshi
Format Journal Article
LanguageJapanese
Published The Society of Polymer Science, Japan 25.09.2012
Subjects
Aromatic Polyesters
Dehydration
End-Capping
Glass Exfoliation
Interfacial Polycondensation
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Summary:Commercial optical resins on their moldings have been required to be dried in their water contents, 0.01∼0.05 wt%, in hot airflow. However, the structure of wet resins and the location and role of water molecules in them remain unknown. Polymerization of Bisphenol A and iso- and tere-phthaloyl chlorides by the interfacial polycondensation method provides a polyester, PARFree, which has phenolic OH groups at the polymer ends. In contrast, the polymerization in the presence of benzoyl chloride, BC, causes benzoylation of the end OH groups to give fully esterified polyesters, PAREC. This method gave us a new technology for production of colorless, transparent and heat resistant optical fibers. We found that when PAR films using dichloromethane were cast on a glass dish, the glass surfaces often are widely exfoliated with the resin film. In this study, this surface-exfoliation phenomenon is explored.
ISSN:0386-2186
1881-5685
DOI:10.1295/koron.69.511