摘要
实验研究了恒定外力下橡皮圈伸长和温度的关系,并通过热力学分析发现橡胶的"热缩冷胀"正是熵弹性的体现.利用这一实验结果和热力学循环关系,得到了橡皮圈内能贡献和张力比值fe/f大约为20%.
High elasticity is a special mechanic property of rubber. Extended rubber contracts when being heated. We experimentally demonstrate this phenomenon and obtain the extension as a function ot temperature at different tensile forces. Through thermodynamic analysis, we find the abnormal expan- sion and contraction of rubber resulting from entropy elasticity. Further, we show the ratio of internal energy contribution and force fe/f is around 20% by virtue of our experimental results and thermody- namic cyclic relation.
出处
《湖州师范学院学报》
2014年第2期23-26,共4页
Journal of Huzhou University
基金
国家自然科学基金(10947012)
关键词
热缩冷胀
熵弹性
内能贡献
Key words：contract when being heated and extend when being cooled
entropy elasticity
internal energycontribution
