| 象胶“热缩冷胀”的实验研究及其热力学分析 |
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| 引用本文： | 毛俊雯,罗骏,徐燕,许丹丹,任文英.象胶“热缩冷胀”的实验研究及其热力学分析[J].湖州师专学报,2014(2):23-26. |
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| 作者姓名： | 毛俊雯 罗骏 徐燕 许丹丹 任文英 |
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| 作者单位： | 湖州师范学院理学院,浙江湖州313000 |
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| 基金项目： | 国家自然科学基金（10947012）. |
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| 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％．
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| 关 键 词： | 热缩冷胀 熵弹性 内能贡献 |
Experimental Investigation and Thermodynamic Analysis of Thermal Contraction of Rubber |
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| Authors: | MAO Junwen LUO Jun XU Yan XU Dandan REN Wenying |
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| Institution: | (School of Science, Journal of Huzhou University, Huzhou 313000, China) |
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| Abstract: | 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. |
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| Keywords: | Key words：contract when being heated and extend when being cooled entropy elasticity internal energycontribution |
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