Thermal behavior and morphology of rubber-modified epoxies

Woo Nyon Kim, Chan Eon Park, Charles M. Burns

Research output: Contribution to journalArticle

8 Citations (Scopus)

Abstract

Rubber-modified epoxies of tetraglycidyl-4,4′-diaminodiphenyl methane and a carboxyl-terminated copolymer of butadiene-acrylonitrile (CTBN) have been investigated by differential scanning calorimetry, scanning electron microscopy, and micrograph image analysis, Bisphenol-A (BPA) was used to produce chain-extended resins by reaction with the epoxy-terminated rubber. Diaminodiphenyl sulfone was used as a hardener. Partially cured resins were prepared with different amounts of added CTBN and cured in an oven for different cure times at 448 K. From the measured heat of reaction of the samples, a fast curing reaction was observed when PBA was present in the resin formulation. In the study of the morphology, the average size of the domains was seen to increase with the CTBN content. These CTBN-rich domains appear to include substantial amounts of epoxy material, as indicated by the measured glass transition temperature of the CTBN-rich phase. The size of domains was observed to range mostly from 0.1 to 5 μm in diameter and to show a slightly bimodal distribution, with modes around 1 μm and 3-4 μm when 15 and 20 phr CTBN was added.

Original languageEnglish
Pages (from-to)1951-1957
Number of pages7
JournalJournal of Applied Polymer Science
Volume50
Issue number11
DOIs
Publication statusPublished - 1993 Dec 1

Fingerprint

Acrylonitrile
Rubber
Butadiene
Copolymers
Resins
Sulfones
Methane
Ovens
Image analysis
Curing
Hot Temperature
1,3-butadiene
Differential scanning calorimetry
Scanning electron microscopy

ASJC Scopus subject areas

  • Polymers and Plastics

Cite this

Thermal behavior and morphology of rubber-modified epoxies. / Kim, Woo Nyon; Park, Chan Eon; Burns, Charles M.

In: Journal of Applied Polymer Science, Vol. 50, No. 11, 01.12.1993, p. 1951-1957.

Research output: Contribution to journalArticle

Kim, Woo Nyon ; Park, Chan Eon ; Burns, Charles M. / Thermal behavior and morphology of rubber-modified epoxies. In: Journal of Applied Polymer Science. 1993 ; Vol. 50, No. 11. pp. 1951-1957.
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