Studies on Isothermal Urethane Polymerization
作者:
Reji John,
E.T. Thachil,
P. Ravindran,
N.R. Neelakantan,
N. Subramanian,
期刊:
Polymer-Plastics Technology and Engineering
(Taylor Available online 1991)
卷期:
Volume 30,
issue 2-3
页码: 227-238
ISSN:0360-2559
年代: 1991
DOI:10.1080/03602559108020137
出版商: Taylor & Francis Group
数据来源: Taylor
摘要:
Polyurethane reaction between a new polyol and TDI under isothermal conditions was investigated. The progress of the reaction was monitored by following the viscosity as well as the monomer conversion. Viscosity variations were measured by means of a cone-and-plate viscometer while conversion was estimated by IR technique. An already reported empirical relationship between these two was verified. Stockmayer's formula for weight average molecular weight of a linearly polycondensing system was used to find molecular weights at every stage of the reaction. The interdependence of viscosity and weight average molecular weight was confirmed, and the value of the indexmwas obtained.
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