EFFECT OF PHYSICAL AGING ON THE FRACTURE-BEHAVIOR OF CROSS-LINKED EPOXIES

被引:10
作者
TRUONG, VT
ENNIS, BC
机构
[1] Materials Research Laboratory, Dsto, Melbourne, Victoria, 3032, Ascot Vale
关键词
D O I
10.1002/pen.760310803
中图分类号
TQ [化学工业];
学科分类号
0817 ;
摘要
The effect of physical aging on the fracture behavior, crack opening displacement, and plastic deformation zone of unmodified and rubber-modified epoxies was determined at two aging temperatures and different displacement rates. The strain energy release rate decreases to between 40 and 50% (for rubber modified and unmodified samples, respectively) of the unaged values after 35 days aging. Systematic dependence of the decrease in fracture toughness by aging on the rubber content is not apparent. The increased yield stress after physical aging is the main factor contributing to the reduction in fracture toughness, crack opening displacement, and plastic deformation zone. Physical aging suppresses the crack blunting mechanisms in epoxies.
引用
收藏
页码:548 / 557
页数:10
相关论文
共 27 条
[1]   FRACTURE OF EPOXY-MODIFIED AND ELASTOMER-MODIFIED EPOXY POLYMERS IN BULK AND AS ADHESIVES [J].
BASCOM, WD ;
COTTINGTON, RL ;
JONES, RL ;
PEYSER, P .
JOURNAL OF APPLIED POLYMER SCIENCE, 1975, 19 (09) :2545-2562
[2]   ANNEALING OF POLYCARBONATE BELOW THE GLASS-TRANSITION - QUANTITATIVE INTERPRETATION OF THE EFFECT ON YIELD STRESS AND DIFFERENTIAL SCANNING CALORIMETRY MEASUREMENTS [J].
BAUWENSCROWET, C ;
BAUWENS, JC .
POLYMER, 1982, 23 (11) :1599-1604
[3]   CHANGES IN YIELD AND DEFORMATION OF POLYCARBONATES CAUSED BY PHYSICAL AGING [J].
BUBECK, RA ;
BALES, SE ;
LEE, HD .
POLYMER ENGINEERING AND SCIENCE, 1984, 24 (14) :1142-1148
[4]   TOUGHENING TETRAFUNCTIONAL EPOXY-RESINS USING POLYETHERIMIDE [J].
BUCKNALL, CB ;
GILBERT, AH .
POLYMER, 1989, 30 (02) :213-217
[5]   STUDIES OF EPOXY-RESIN SYSTEMS .D. FRACTURE-TOUGHNESS OF AN EPOXY-RESIN - A STUDY OF THE EFFECT OF CROSSLINKING AND SUB-TG AGING [J].
CHANG, TD ;
BRITTAIN, JO .
POLYMER ENGINEERING AND SCIENCE, 1982, 22 (18) :1228-1236
[6]   STUDIES OF EPOXY-RESIN SYSTEMS .C. EFFECT OF SUB-TG AGING ON THE PHYSICAL-PROPERTIES OF A FULLY CURED EPOXY-RESIN [J].
CHANG, TD ;
BRITTAIN, JO .
POLYMER ENGINEERING AND SCIENCE, 1982, 22 (18) :1221-1227
[7]   SIMPLE METHOD FOR EVALUATING SLOW CRACK GROWTH IN BRITTLE MATERIALS [J].
EVANS, AG .
INTERNATIONAL JOURNAL OF FRACTURE, 1973, 9 (03) :267-275
[8]   EFFECT OF THERMAL PRETREATMENT ON STRENGTH OF POLCARBONATE [J].
GOLDEN, JH ;
HAMMANT, BL ;
HAZELL, EA .
JOURNAL OF APPLIED POLYMER SCIENCE, 1967, 11 (08) :1571-&
[9]   DEFORMATION AND FRACTURE-BEHAVIOR OF A RUBBER-TOUGHENED EPOXY .2. FAILURE CRITERIA [J].
KINLOCH, AJ ;
SHAW, SJ ;
HUNSTON, DL .
POLYMER, 1983, 24 (10) :1355-1363
[10]  
KINLOCH AJ, 1983, FRACTURE BEHAVIOUR P, pCH3