DSpace
 

DSpace at IIT Bombay >
IITB Publications >
Article >

Please use this identifier to cite or link to this item: http://dspace.library.iitb.ac.in/jspui/handle/10054/9954

Title: Crystallization and equilibrium melting behavior of poly(butylene terephthalate)/epoxy blends
Authors: KULSHRESHTHA, B
GHOSH, AK
MISRA, A
Keywords: poly(2,6-dimethyl-1,4-phenylene ether)
reactive solvents
point depression
thermal-analysis
epoxy-resin
polymers
temperature
endotherms
mixtures
pbt
Issue Date: 2003
Publisher: MARCEL DEKKER INC
Citation: JOURNAL OF MACROMOLECULAR SCIENCE-PHYSICS, B42(2), 307-323
Abstract: Blends of poly(butylene terephthalate) (PBT) with epoxy resin (diglycidyl ether of bisphenol-A) have been prepared by blending in a mini-mixer and then cured using a 4-functional amine curing agent at 175degreesC for 4 hr. Melting and crystallization behavior of the uncured and cured blends has been studied using differential scanning calorimetry. Isothermal crystallization studies of the uncured, as well as cured, blends have been carried out to determine the induction time for the onset of the nucleation process, The equilibrium melting behavior of cured and uncured blends has been studied using Hoffman-Week's linear extrapolation method. From the equilibrium melting temperature gamma, the proportionality factor between initial thickness of chain-folded lamella and final thickness was calculated. The Flory interaction parameter, X, between PBT and epoxy resin has been calculated using the Nishi-Wang equation. The interaction parameter is found to be negative. indicating that PBT forms a thermodynamic stable mixture with the epoxy monomer. It has been shown that PBT forms miscible blend with uncured epoxy, which affects the crystallization and equilibrium melting behavior of PBT. After curing, due to the phase separation of PBT and epoxy, the melting and crystallization behavior of cured blends is closer to that of pure PBT.
URI: http://dx.doi.org/10.1081/MB-120017121
http://dspace.library.iitb.ac.in/xmlui/handle/10054/9954
http://hdl.handle.net/10054/9954
ISSN: 0022-2348
Appears in Collections:Article

Files in This Item:

There are no files associated with this item.

View Statistics

Items in DSpace are protected by copyright, with all rights reserved, unless otherwise indicated.

 

Valid XHTML 1.0! DSpace Software Copyright © 2002-2010  Duraspace - Feedback