NR1151天然橡胶材料的热空气老化性能

通过不同应力状态下热空气老化试验和高低温循环老化试验,研究了NR1151天然橡胶性能的老化变化情况。结果表明：在70,90℃和110℃不同温度下连续热空气老化时,NR1151天然橡胶材料的拉伸强度和拉断伸长率均随着老化时间增加而明显下降,温度越高则下降越快;90℃时,应力对NR1151的老化有明显的加速作用;高低温循环老化时,NR1151天然橡胶材料的拉伸性能老化速率变慢,且循环周期越短,性能老化速率越慢。...

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Bibliographic Details
Published in航空材料学报 Vol. 36; no. 2; pp. 46 - 50
Main Author 丁祖群 侯平安 闵雅兰
Format Journal Article
LanguageChinese
Published 中航工业成都飞机工业(集团)有限责任公司 制造工程部,成都,610091 2016
Subjects
天然橡胶材料
应力-热老化
热空气老化
老化失效
高低温循环老化
天然橡胶材料
natural rubber
heating aging
stress-heating aging
high-low temperature cycling aging
热空气老化
高低温循环老化
应力-热老化
老化失效
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ISSN1005-5053
DOI10.11868/j.issn.1005-5053.2016.2.008

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Summary:通过不同应力状态下热空气老化试验和高低温循环老化试验,研究了NR1151天然橡胶性能的老化变化情况。结果表明：在70,90℃和110℃不同温度下连续热空气老化时,NR1151天然橡胶材料的拉伸强度和拉断伸长率均随着老化时间增加而明显下降,温度越高则下降越快;90℃时,应力对NR1151的老化有明显的加速作用;高低温循环老化时,NR1151天然橡胶材料的拉伸性能老化速率变慢,且循环周期越短,性能老化速率越慢。
Bibliography:natural rubber; heating aging; stress-heating aging; high-low temperature cycling aging
DING Zuqun, HOU Ping＇an, MIN Yalan （Manufacturing Engineer Department, AVIC Chengdu Aircraft Industrial （Group） CO., LTD. Chengdu 610091, China）
11-3159/V
The aging effects on mechanical performance of natural rubber were studied. The samples were aged in three different ways：thermal aging,thermal aging under stress and high-low temperature cycling aging. The hardness,degree of cross linking,retention ratio of elongation at break and tensile strength of the aged samples were measured. The results show that the elongation at break and tensile strength is decreased with the increase of aging time and temperature. The stress has an accelerating effect on aging when the temperature is 90℃. The aging rate is relatively lower in the high-low temperature cycling aging experiment,and the shorter the cycle period is,the lower the aging rate is.
ISSN:1005-5053
DOI:10.11868/j.issn.1005-5053.2016.2.008