Abstract
We measured the temperature change in strips of poly(dimethylsiloxane) (PDMS) and ethylene-propylene rubbers that occurred as they were stretched and allowed to shrink by a factor of 3.5-4.5, along with the tensile force that effected the deformation. Main results obtained are as follows: (1) the temperature change is fully reversible in E-P rubber and slightly but definitely irreversible in PDMS rubber. The temperature rise in the latter on stretching is larger than the fall on shrinking by ca. 20 %. (2) The reversible part of heat that evolves from or is absorbed by PDMS rubber is smaller than, but close to, the mechanical energy expended. For E-P rubber, the heat generated greatly exceeds the expended mechanical energy. (3) The entropy of extension as a function of extension is reproduced well by Wang and Guth calculation for PDMS rubber, but not for E-P rubber.
| Original language | English |
|---|---|
| Pages (from-to) | 1817-1824 |
| Number of pages | 8 |
| Journal | Journal of Thermal Analysis and Calorimetry |
| Volume | 123 |
| Issue number | 3 |
| DOIs | |
| Publication status | Published - Mar 1 2016 |
| Externally published | Yes |
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Keywords
- Energy dissipation
- Entropy elasticity
- Ethylene-propylene rubber
- Ideal rubber
- Irreversibility
- Non-ideal rubber
- Poly(dimethylsiloxane) rubber
- Reversibility
- Silicone rubber
ASJC Scopus subject areas
- Condensed Matter Physics
- Physical and Theoretical Chemistry
Cite this
Mechanocaloric properties of poly(dimethylsiloxane) and ethylene-propylene rubbers. / Matsuo, Takasuke; Azuma, Nobuaki; Toriyama, Yoshitaka; Yoshioka, Tomohiro.
In: Journal of Thermal Analysis and Calorimetry, Vol. 123, No. 3, 01.03.2016, p. 1817-1824.Research output: Contribution to journal › Article
}
TY - JOUR
T1 - Mechanocaloric properties of poly(dimethylsiloxane) and ethylene-propylene rubbers
AU - Matsuo, Takasuke
AU - Azuma, Nobuaki
AU - Toriyama, Yoshitaka
AU - Yoshioka, Tomohiro
PY - 2016/3/1
Y1 - 2016/3/1
N2 - We measured the temperature change in strips of poly(dimethylsiloxane) (PDMS) and ethylene-propylene rubbers that occurred as they were stretched and allowed to shrink by a factor of 3.5-4.5, along with the tensile force that effected the deformation. Main results obtained are as follows: (1) the temperature change is fully reversible in E-P rubber and slightly but definitely irreversible in PDMS rubber. The temperature rise in the latter on stretching is larger than the fall on shrinking by ca. 20 %. (2) The reversible part of heat that evolves from or is absorbed by PDMS rubber is smaller than, but close to, the mechanical energy expended. For E-P rubber, the heat generated greatly exceeds the expended mechanical energy. (3) The entropy of extension as a function of extension is reproduced well by Wang and Guth calculation for PDMS rubber, but not for E-P rubber.
AB - We measured the temperature change in strips of poly(dimethylsiloxane) (PDMS) and ethylene-propylene rubbers that occurred as they were stretched and allowed to shrink by a factor of 3.5-4.5, along with the tensile force that effected the deformation. Main results obtained are as follows: (1) the temperature change is fully reversible in E-P rubber and slightly but definitely irreversible in PDMS rubber. The temperature rise in the latter on stretching is larger than the fall on shrinking by ca. 20 %. (2) The reversible part of heat that evolves from or is absorbed by PDMS rubber is smaller than, but close to, the mechanical energy expended. For E-P rubber, the heat generated greatly exceeds the expended mechanical energy. (3) The entropy of extension as a function of extension is reproduced well by Wang and Guth calculation for PDMS rubber, but not for E-P rubber.
KW - Energy dissipation
KW - Entropy elasticity
KW - Ethylene-propylene rubber
KW - Ideal rubber
KW - Irreversibility
KW - Non-ideal rubber
KW - Poly(dimethylsiloxane) rubber
KW - Reversibility
KW - Silicone rubber
UR - http://www.scopus.com/inward/record.url?scp=84959228072&partnerID=8YFLogxK
UR - http://www.scopus.com/inward/citedby.url?scp=84959228072&partnerID=8YFLogxK
U2 - 10.1007/s10973-015-4675-0
DO - 10.1007/s10973-015-4675-0
M3 - Article
VL - 123
SP - 1817
EP - 1824
JO - Journal of Thermal Analysis and Calorimetry
JF - Journal of Thermal Analysis and Calorimetry
SN - 1388-6150
IS - 3
ER -