| Texto completo | |
| Autor(es): |
dos Santos, Wilson Nunes
[1]
;
dos Santos, Jorge Nicolau
[2]
;
Mummery, Paul
[3]
;
Wallwork, Andrew
[3]
Número total de Autores: 4
|
| Afiliação do(s) autor(es): | [1] Univ Fed Sao Carlos, Dept Mat Engn, BR-13560 Sao Carlos, SP - Brazil
[2] Univ Sao Paulo, Dept Mech Engn, Sao Carlos, SP - Brazil
[3] Univ Manchester, Sch Mat, Manchester M1 7HS, Lancs - England
Número total de Afiliações: 3
|
| Tipo de documento: | Artigo Científico |
| Fonte: | Polymer Testing; v. 29, n. 1, p. 107-112, FEB 2010. |
| Citações Web of Science: | 12 |
| Resumo | |
The nature of the molecular structure of plastics makes the properties of such materials markedly temperature dependent. In addition, the continuous increase in the utilization of polymeric materials in many specific applications has demanded knowledge of their physical properties, both during their processing as raw material, as well as over the working temperature range of the final polymer product. Thermal conductivity, thermal diffusivity and specific heat, namely the thermal properties, are the three most important physical properties of a material that are needed for heat transfer calculations. Recently, among several different methods for the determination of the thermal diffusivity and thermal conductivity, transient techniques have become the preferable way for measuring thermal properties of materials. In this work, a very simple and low cost variation of the well known Angstrom method is employed in the experimental determination of the thermal diffusivity of some selected polymers. Cylindrical shaped samples 3 cm diameter and 7 cm high were prepared by cutting from long cylindrical commercial bars. The reproducibility is very good, and the results obtained were checked against results obtained by the hot wire technique, laser flash technique, and when possible, they were also compared with data found in the literature. Thermal conductivity may be then derived from the thermal diffusivity with the knowledge of the bulk density and the specific heat, easily obtained by differential scanning calorimetry. (C) 2009 Elsevier Ltd. All rights reserved. (AU) | |
| Processo FAPESP: | 07/04409-0 - Determinação e estudo de propriedades térmicas de polímeros por técnicas transientes de trocas de calor |
| Beneficiário: | Wilson Nunes dos Santos |
| Modalidade de apoio: | Auxílio à Pesquisa - Regular |