Modelling of polyethylene terephthalate reactors-X. A comprehensive model for solid-state polycondensation process

Devotta, I. ; Mashelkar, R. A. (1993) Modelling of polyethylene terephthalate reactors-X. A comprehensive model for solid-state polycondensation process Chemical Engineering Science, 48 (10). pp. 1859-1867. ISSN 0009-2509

Full text not available from this repository.

Official URL: http://linkinghub.elsevier.com/retrieve/pii/000925...

Related URL: http://dx.doi.org/10.1016/0009-2509(93)80356-U

Abstract

A new comprehensive model for solid-state polycondensation (SSP) of polyethylene terephthalate (PET) has been developed, which interprets a number of hitherto unexplained observations. Degradation and other side reactions which were neglected in the earlier models for SSP process of PET are included. The diffusivity changes due to crystallisation of PET, the true influence of nature of carrier gas and the increase in the reactive chain end group mobility due to the change in the free volume in the presence of an inert gas have been considered. The model predictions have been validated with experimental data reported in the literature. The model can be used for a quantitative prediction of the influence of a variety of parameters on the degree of polymerisation as well as side products formation. The model correctly brings out the true influence of the carrier gas which had remained unexplained so far. It also suggests additional directions for improving the SSP process.

Item Type:Article
Source:Copyright of this article belongs to Elsevier Science.
ID Code:22129
Deposited On:23 Nov 2010 08:18
Last Modified:06 Jun 2011 09:04

Repository Staff Only: item control page