مورد إلكتروني
Cooling phenomenon of rubber network under deformation at pure shear mode
| العنوان: | Cooling phenomenon of rubber network under deformation at pure shear mode |
|---|---|
| بيانات النشر: | London IOM Communications 2019 |
| تفاصيل مُضافة: | Akutagawa K. IOM Communications and International Rubber Conference Organisation IRC 2019: Innovations in elastomeric materials & products Kia Oval, London, UK 3-5th Sept. 2019 Morishita Y. Tsunoda K. |
| نوع الوثيقة: | Electronic Resource |
| مستخلص: | The cooling phenomenon due to the thermo-elastic inversion effect of cross-linked cis-1,4-polyisoprene rubber was investigated at pure shear mode. Temperature change was measured using a thermo-camera under repeated deformation with maximum extension ratio of 4.0. The strain rate was varied from 0.05 to 20s-1. These conditions at pure shear mode can minimize the temperature change due to the effects of viscoelasticity and strain induced crystallization, which was confirmed by the fact that the area of hysteresis loop was minimized and showed little strain rate dependence. At low strain speed the temperature continuously decreased until the temperature reached equilibrium. The cooling effect was more dominant at un-stretching process. On the other hand, the magnitude of cooling effect became smaller as the strain rate increased. These experimental results were analyzed with the non-Gaussian network theory of rubber elasticity. At low strain rate the thermo-elastic inversion effect is dominated, which is associated with the volumetric expansion under deformation, but at higher rate the volumetric expansion cannot follow the deformation rate. This suggested that at lower strain rate the molecular agitation energy due to the deformation was transformed into the potential energy of the volumetric expansion for the cooling effect, but at higher strain rate it was stored as the kinetic energy for increasing temperature. This indicates that not only the viscoelastic effect but also the thermodynamic effect should be taken into account in interpreting the thermo-mechanical behaviour of rubber-like materials The cooling phenomenon due to the thermo-elastic inversion effect of cross-linked cis-1,4-polyisoprene rubber was investigated at pure shear mode. Temperature change was measured using a thermo-camera under repeated deformation with maximum extension ratio of 4.0. The strain rate was varied from 0.05 to 20s-1. These conditions at pure shear mode can minimize the temperature change due to the effects of viscoelasticity and strain induced crystallization, which was confirmed by the fact that the area of hysteresis loop was minimized and showed little strain rate dependence. At low strain speed the temperature continuously decreased until the temperature reached equilibrium. The cooling effect was more dominant at un-stretching process. On the other hand, the magnitude of cooling effect became smaller as the strain rate increased. These experimental results were analyzed with the non-Gaussian network theory of rubber elasticity. At low strain rate the thermo-elastic inversion effect is dominated, which is associated with the volumetric expansion under deformation, but at higher rate the volumetric expansion cannot follow the deformation rate. This suggested that at lower strain rate the molecular agitation energy due to the deformation was transformed into the potential energy of the volumetric expansion for the cooling effect, but at higher strain rate it was stored as the kinetic energy for increasing temperature. This indicates that not only the viscoelastic effect but also the thermodynamic effect should be taken into account in interpreting the thermo-mechanical behaviour of rubber-like materials |
| مصطلحات الفهرس: | cooling phenomenon, low strain speed, pure shear mode, rubber, rubber network, polymers, software, multimedia |
| URL: | |
| الإتاحة: | Open access content. Open access content |
| ملاحظة: | und |
| أرقام أخرى: | UKMMM oai:icon.iom3.org:174004 1309287069 |
| المصدر المساهم: | INSTITUTE OF MATS MINERALS & MINING From OAIster®, provided by the OCLC Cooperative. |
| رقم الانضمام: | edsoai.on1309287069 |
| قاعدة البيانات: | OAIster |
| الوصف غير متاح. |