Effects of vapor-phase-formaldehyde treatments on thermal conductivity and diffusivity of ramie fibers in the range of low temperature
| العنوان: | Effects of vapor-phase-formaldehyde treatments on thermal conductivity and diffusivity of ramie fibers in the range of low temperature |
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| المؤلفون: | Kimiko Ema, Yoshinobu Izumi, Shigehiro Nishijima, Masatoshi Yoshikawa, Masayuki Tsutsumi, Tooru Kitagawa, Takeshi Oohazama, Hiroyuki Fujishiro, Shunzo Abe, Atsuhiko Yamanaka |
| المصدر: | Journal of Polymer Science Part B: Polymer Physics. 43:2754-2766 |
| بيانات النشر: | Wiley, 2005. |
| سنة النشر: | 2005 |
| مصطلحات موضوعية: | chemistry.chemical_classification, Polymers and Plastics, Chemistry, Mean free path, Young's modulus, Polymer, Atmospheric temperature range, Condensed Matter Physics, Thermal diffusivity, Ramie, symbols.namesake, Thermal conductivity, Thermal, Materials Chemistry, symbols, Physical and Theoretical Chemistry, Composite material |
| الوصف: | To understand the influence to thermal conductivity by bridging in the polymer fibers, the thermal conductivity, and thermal diffusivity of ramie fiber and those bridged by formaldehyde (HCHO) using vapor-phase method (VP-HCHO treatment) were investigated in the lower temperature range. The thermal conductivities of ramie fiber with and without VP-HCHO treatments decreased with decreasing temperature. Thermal diffusivities of ramie fiber with and without VP-HCHO treatments were almost constant in the temperature range of 250–50 K, and increased by decreasing temperature below 50 K. Thermal conductivity and thermal diffusivity of ramie fiber decreased by VP-HCHO treatment. The crystallinities and orientation angles of ramie fibers with and without VP-HCHO treatment were measured using solid state NMR and X-ray diffraction. These were almost independent of VP-HCHO treatment. Although tensile modulus decreased slightly by VP-HCHO treatment, the decrease could not explain the decrease in thermal conductivity and diffusivity with decreasing sound velocity. The decrease of the thermal diffusivity and thermal conductivity by VP-HCHO treatment suggested the possibility of the reduction of the mean free path of phonon by HCHO in VP-HCHO treated ramie fiber. © 2005 Wiley Periodicals, Inc. J Polym Sci Part B: Polym Phys 43: 2754–2766, 2005 |
| تدمد: | 1099-0488 0887-6266 |
| URL الوصول: | https://explore.openaire.eu/search/publication?articleId=doi_________::7df638823a59ec03586f6555ca9258e6 https://doi.org/10.1002/polb.20563 |
| حقوق: | CLOSED |
| رقم الأكسشن: | edsair.doi...........7df638823a59ec03586f6555ca9258e6 |
| قاعدة البيانات: | OpenAIRE |
| تدمد: | 10990488 08876266 |
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