Analysis of Glass Transition Temperatures and Mechanical Properties of Epoxy Modified Natural Rubber

M. Khairulazfar, Nor Yuliana Yuhana

Research output: Contribution to journalArticle

Abstract

The glass transition temperature Tg and mechanical properties of diglycidyl ether of bisphenol A (DGEBA) toughened with two different types of modified natural rubber with and without added clay particles were studied. Poly(etheramine) was used as the curing agent. Two modified natural rubbers, poly(methyl methacrylate) (PMMA) grafted natural rubber (MG30) and liquid epoxidised natural rubber (LENR) were studied at different amounts. The addition of modified natural rubber increased the value of Tg compared to the neat epoxy. It was found that the use of modified natural rubber lowered the hardness value of the epoxy modified system compared to neat epoxy. Generally, there was no significant difference in Tg value and mechanical properties between the epoxy-LENR and epoxy-MG30 systems. The value of Young’s modulus and flexural modulus in this work were significantly different. It was observed that the higher amount of rubber content in the material gave larger size rubber particles, hence, lowering the tensile Young’s modulus and flexural modulus. The adhesion of rubber with epoxy seemed to be poor when using a larger amount of rubber content. The addition of clay nanoparticles (Cloisite Na) increased the Tg and mechanical properties of the system not only relative to the natural rubber modified epoxy, but also for the neat epoxy. In these hybrid modifier systems of clay/modified natural rubber, a significant enhancement in mechanical properties relative to neat epoxy was noticeable.

Original languageEnglish
Pages (from-to)211-226
Number of pages16
JournalJournal of Rubber Research
Volume19
Issue number4
Publication statusPublished - 1 Jan 2016

Fingerprint

glass transition temperature
Rubber
rubber
epoxides
mechanical properties
Mechanical properties
clay
modulus of elasticity
Glass transition temperature
Elastic moduli
curing agents
bisphenol A
liquids
Liquids
Polymethyl Methacrylate
nanoparticles
adhesion
hardness
Curing
ethers

Keywords

  • DGEBA
  • Liquid epoxidised natural rubber
  • Mechanical properties
  • Nanocomposites
  • PMMA grafted natural rubber

ASJC Scopus subject areas

  • Plant Science
  • Organic Chemistry

Cite this

Analysis of Glass Transition Temperatures and Mechanical Properties of Epoxy Modified Natural Rubber. / Khairulazfar, M.; Yuhana, Nor Yuliana.

In: Journal of Rubber Research, Vol. 19, No. 4, 01.01.2016, p. 211-226.

Research output: Contribution to journalArticle

@article{7a0b09b78bec4f5f9d9f88330a40edc5,
title = "Analysis of Glass Transition Temperatures and Mechanical Properties of Epoxy Modified Natural Rubber",
abstract = "The glass transition temperature Tg and mechanical properties of diglycidyl ether of bisphenol A (DGEBA) toughened with two different types of modified natural rubber with and without added clay particles were studied. Poly(etheramine) was used as the curing agent. Two modified natural rubbers, poly(methyl methacrylate) (PMMA) grafted natural rubber (MG30) and liquid epoxidised natural rubber (LENR) were studied at different amounts. The addition of modified natural rubber increased the value of Tg compared to the neat epoxy. It was found that the use of modified natural rubber lowered the hardness value of the epoxy modified system compared to neat epoxy. Generally, there was no significant difference in Tg value and mechanical properties between the epoxy-LENR and epoxy-MG30 systems. The value of Young’s modulus and flexural modulus in this work were significantly different. It was observed that the higher amount of rubber content in the material gave larger size rubber particles, hence, lowering the tensile Young’s modulus and flexural modulus. The adhesion of rubber with epoxy seemed to be poor when using a larger amount of rubber content. The addition of clay nanoparticles (Cloisite Na) increased the Tg and mechanical properties of the system not only relative to the natural rubber modified epoxy, but also for the neat epoxy. In these hybrid modifier systems of clay/modified natural rubber, a significant enhancement in mechanical properties relative to neat epoxy was noticeable.",
keywords = "DGEBA, Liquid epoxidised natural rubber, Mechanical properties, Nanocomposites, PMMA grafted natural rubber",
author = "M. Khairulazfar and Yuhana, {Nor Yuliana}",
year = "2016",
month = "1",
day = "1",
language = "English",
volume = "19",
pages = "211--226",
journal = "Journal of Rubber Research",
issn = "1511-1768",
publisher = "Malaysian Rubber Board",
number = "4",

}

TY - JOUR

T1 - Analysis of Glass Transition Temperatures and Mechanical Properties of Epoxy Modified Natural Rubber

AU - Khairulazfar, M.

AU - Yuhana, Nor Yuliana

PY - 2016/1/1

Y1 - 2016/1/1

N2 - The glass transition temperature Tg and mechanical properties of diglycidyl ether of bisphenol A (DGEBA) toughened with two different types of modified natural rubber with and without added clay particles were studied. Poly(etheramine) was used as the curing agent. Two modified natural rubbers, poly(methyl methacrylate) (PMMA) grafted natural rubber (MG30) and liquid epoxidised natural rubber (LENR) were studied at different amounts. The addition of modified natural rubber increased the value of Tg compared to the neat epoxy. It was found that the use of modified natural rubber lowered the hardness value of the epoxy modified system compared to neat epoxy. Generally, there was no significant difference in Tg value and mechanical properties between the epoxy-LENR and epoxy-MG30 systems. The value of Young’s modulus and flexural modulus in this work were significantly different. It was observed that the higher amount of rubber content in the material gave larger size rubber particles, hence, lowering the tensile Young’s modulus and flexural modulus. The adhesion of rubber with epoxy seemed to be poor when using a larger amount of rubber content. The addition of clay nanoparticles (Cloisite Na) increased the Tg and mechanical properties of the system not only relative to the natural rubber modified epoxy, but also for the neat epoxy. In these hybrid modifier systems of clay/modified natural rubber, a significant enhancement in mechanical properties relative to neat epoxy was noticeable.

AB - The glass transition temperature Tg and mechanical properties of diglycidyl ether of bisphenol A (DGEBA) toughened with two different types of modified natural rubber with and without added clay particles were studied. Poly(etheramine) was used as the curing agent. Two modified natural rubbers, poly(methyl methacrylate) (PMMA) grafted natural rubber (MG30) and liquid epoxidised natural rubber (LENR) were studied at different amounts. The addition of modified natural rubber increased the value of Tg compared to the neat epoxy. It was found that the use of modified natural rubber lowered the hardness value of the epoxy modified system compared to neat epoxy. Generally, there was no significant difference in Tg value and mechanical properties between the epoxy-LENR and epoxy-MG30 systems. The value of Young’s modulus and flexural modulus in this work were significantly different. It was observed that the higher amount of rubber content in the material gave larger size rubber particles, hence, lowering the tensile Young’s modulus and flexural modulus. The adhesion of rubber with epoxy seemed to be poor when using a larger amount of rubber content. The addition of clay nanoparticles (Cloisite Na) increased the Tg and mechanical properties of the system not only relative to the natural rubber modified epoxy, but also for the neat epoxy. In these hybrid modifier systems of clay/modified natural rubber, a significant enhancement in mechanical properties relative to neat epoxy was noticeable.

KW - DGEBA

KW - Liquid epoxidised natural rubber

KW - Mechanical properties

KW - Nanocomposites

KW - PMMA grafted natural rubber

UR - http://www.scopus.com/inward/record.url?scp=85041841788&partnerID=8YFLogxK

UR - http://www.scopus.com/inward/citedby.url?scp=85041841788&partnerID=8YFLogxK

M3 - Article

AN - SCOPUS:85041841788

VL - 19

SP - 211

EP - 226

JO - Journal of Rubber Research

JF - Journal of Rubber Research

SN - 1511-1768

IS - 4

ER -