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Several reactions of poly(vinyl alcohol)–type acetaldehyde polymer
Author(s) -
Matsubara Tsutomu,
Imoto Tatsuya
Publication year - 1969
Publication title -
journal of applied polymer science
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.575
H-Index - 166
eISSN - 1097-4628
pISSN - 0021-8995
DOI - 10.1002/app.1969.070130702
Subject(s) - acetaldehyde , copolymer , materials science , vinyl alcohol , polymer chemistry , catalysis , polymer , chemistry , organic chemistry , composite material , ethanol
The preparation of the acetaldehyde polymers (PACH) having a poly(vinyl alcohol)‐type structure and the thermal degradation of PACH have been reported previously. This paper will describe detailed aspects of several reactions of PACH. Copolymerization of PACH with toluene diisocyanate (TDI) was performed both thermally and catalytically. When piperidine was used as catalyst, the rate of reaction between PACH and TDI was found to depend on the concentration of both the active hydrogen of PACH and the isocynante group TDI. Acid and alkali treatment of PACH were carried out. On treatment with sulfuric acid, white polymers with good spinnability were obtained. The copolymerization of acetaldehyde with n ‐butylaldehyde were performed in the presence of sodium amalgam as catalyst. The reaction products were colorless, viscous liquids and assumed from the infrared and NMR spectra, elemental analyses, molecular weight and solubility tests to be aldol condensation‐type copolymers.