Effect of molecular weight between crosslinks on the fracture behavior of rubber-toughened epoxy adhesives

Byoung Un Kang, Jae Young Jho, Junkyung Kim, Sang-Soo Lee, Min Park, Soonho Lim, Chul Rim Choe

Research output: Contribution to journalArticle

38 Citations (Scopus)

Abstract

The effect of molecular weight between crosslinks, Mc, on the fracture behavior of rubber-toughened epoxy adhesives was investigated and compared with the behavior of the bulk resins. In the liquid rubber-toughened bulk system, fracture energy increased with increasing Mc. However, in the liquid rubber-toughened adhesive system, with increasing Mc, the locus of joint fracture had a transition from cohesive failure, break in the bond layer, to interfacial failure, rupture of the bond layer from the surface of the substrate. Specimens fractured by cohesive failure exhibited larger fracture energies than those by interfacial failure. The occurrence of transition from cohesive to interfacial failure seemed to be caused by the increase in the ductility of matrix, the mismatch of elastic constant, and the agglomeration of rubber particles at the metal/epoxy interface. When core-shell rubber, which did not agglomerate at the interface, was used as a toughening agent, fracture energy increased with Mc.

Original languageEnglish
Pages (from-to)38-48
Number of pages11
JournalJournal of Applied Polymer Science
Volume79
Issue number1
DOIs
Publication statusPublished - 2001 Jan 1

Fingerprint

Rubber
Adhesives
Molecular weight
Fracture energy
Toughening
Liquids
Elastic constants
Ductility
Agglomeration
Resins
Metals
Substrates

ASJC Scopus subject areas

  • Polymers and Plastics

Cite this

Effect of molecular weight between crosslinks on the fracture behavior of rubber-toughened epoxy adhesives. / Kang, Byoung Un; Jho, Jae Young; Kim, Junkyung; Lee, Sang-Soo; Park, Min; Lim, Soonho; Choe, Chul Rim.

In: Journal of Applied Polymer Science, Vol. 79, No. 1, 01.01.2001, p. 38-48.

Research output: Contribution to journalArticle

Kang, Byoung Un ; Jho, Jae Young ; Kim, Junkyung ; Lee, Sang-Soo ; Park, Min ; Lim, Soonho ; Choe, Chul Rim. / Effect of molecular weight between crosslinks on the fracture behavior of rubber-toughened epoxy adhesives. In: Journal of Applied Polymer Science. 2001 ; Vol. 79, No. 1. pp. 38-48.
@article{7e6cd16837a44a028b66912182496524,
title = "Effect of molecular weight between crosslinks on the fracture behavior of rubber-toughened epoxy adhesives",
abstract = "The effect of molecular weight between crosslinks, Mc, on the fracture behavior of rubber-toughened epoxy adhesives was investigated and compared with the behavior of the bulk resins. In the liquid rubber-toughened bulk system, fracture energy increased with increasing Mc. However, in the liquid rubber-toughened adhesive system, with increasing Mc, the locus of joint fracture had a transition from cohesive failure, break in the bond layer, to interfacial failure, rupture of the bond layer from the surface of the substrate. Specimens fractured by cohesive failure exhibited larger fracture energies than those by interfacial failure. The occurrence of transition from cohesive to interfacial failure seemed to be caused by the increase in the ductility of matrix, the mismatch of elastic constant, and the agglomeration of rubber particles at the metal/epoxy interface. When core-shell rubber, which did not agglomerate at the interface, was used as a toughening agent, fracture energy increased with Mc.",
author = "Kang, {Byoung Un} and Jho, {Jae Young} and Junkyung Kim and Sang-Soo Lee and Min Park and Soonho Lim and Choe, {Chul Rim}",
year = "2001",
month = "1",
day = "1",
doi = "10.1002/1097-4628(20010103)79:1<38::AID-APP50>3.0.CO;2-O",
language = "English",
volume = "79",
pages = "38--48",
journal = "Journal of Applied Polymer Science",
issn = "0021-8995",
publisher = "John Wiley and Sons Inc.",
number = "1",

}

TY - JOUR

T1 - Effect of molecular weight between crosslinks on the fracture behavior of rubber-toughened epoxy adhesives

AU - Kang, Byoung Un

AU - Jho, Jae Young

AU - Kim, Junkyung

AU - Lee, Sang-Soo

AU - Park, Min

AU - Lim, Soonho

AU - Choe, Chul Rim

PY - 2001/1/1

Y1 - 2001/1/1

N2 - The effect of molecular weight between crosslinks, Mc, on the fracture behavior of rubber-toughened epoxy adhesives was investigated and compared with the behavior of the bulk resins. In the liquid rubber-toughened bulk system, fracture energy increased with increasing Mc. However, in the liquid rubber-toughened adhesive system, with increasing Mc, the locus of joint fracture had a transition from cohesive failure, break in the bond layer, to interfacial failure, rupture of the bond layer from the surface of the substrate. Specimens fractured by cohesive failure exhibited larger fracture energies than those by interfacial failure. The occurrence of transition from cohesive to interfacial failure seemed to be caused by the increase in the ductility of matrix, the mismatch of elastic constant, and the agglomeration of rubber particles at the metal/epoxy interface. When core-shell rubber, which did not agglomerate at the interface, was used as a toughening agent, fracture energy increased with Mc.

AB - The effect of molecular weight between crosslinks, Mc, on the fracture behavior of rubber-toughened epoxy adhesives was investigated and compared with the behavior of the bulk resins. In the liquid rubber-toughened bulk system, fracture energy increased with increasing Mc. However, in the liquid rubber-toughened adhesive system, with increasing Mc, the locus of joint fracture had a transition from cohesive failure, break in the bond layer, to interfacial failure, rupture of the bond layer from the surface of the substrate. Specimens fractured by cohesive failure exhibited larger fracture energies than those by interfacial failure. The occurrence of transition from cohesive to interfacial failure seemed to be caused by the increase in the ductility of matrix, the mismatch of elastic constant, and the agglomeration of rubber particles at the metal/epoxy interface. When core-shell rubber, which did not agglomerate at the interface, was used as a toughening agent, fracture energy increased with Mc.

UR - http://www.scopus.com/inward/record.url?scp=0035151847&partnerID=8YFLogxK

UR - http://www.scopus.com/inward/citedby.url?scp=0035151847&partnerID=8YFLogxK

U2 - 10.1002/1097-4628(20010103)79:1<38::AID-APP50>3.0.CO;2-O

DO - 10.1002/1097-4628(20010103)79:1<38::AID-APP50>3.0.CO;2-O

M3 - Article

AN - SCOPUS:0035151847

VL - 79

SP - 38

EP - 48

JO - Journal of Applied Polymer Science

JF - Journal of Applied Polymer Science

SN - 0021-8995

IS - 1

ER -