Dynamic Moduli of Polybutylene Terephthalate Glass Fiber Reinforced in High-Temperature Environments

Materials

Francisco Cavas¹  Jorge Mira²  Carmelo Gómez²  FranciscoJ. Carrión-Vilches³ 

[1] Department of Structures, Construction and Graphical Expression, Technical University of Cartagena, 30202 Cartagena, Spain;Doctorate Program in Industrial Technologies, International School of Doctorate, Technical University of Cartagena, 30202 Cartagena, Spain;Materials Science and Metallurgical Engineering Group, Materials Engineering and Manufacturing Department, Technical University of Cartagena, 30202 Cartagena, Spain;

关键词: polymer composites;    storage modulus;    glass fiber;    high temperature;   

DOI  :  10.3390/ma14030483

来源: DOAJ

【 摘 要 】

The aim of this work was to show the evolution over time of the dynamic moduli in components made of Polybutylene Terephthalate reinforced with glass fiber when they are held to temperatures close to the glass transition temperature over time. For this purpose, PBT samples reinforced with short, glass fibers of Ultradur^® material with 0%, 20%, and 50% in weight content were tested. Dynamic moduli showed an increment with glass fiber content showing a nonlinear behavior with the temperature. The evolution of storage modulus was depicted by means of a modified law of mixtures with an effectiveness factor depending on temperature and fiber content, whereas the evolution over time was obtained with a time–temperature transformation generated with the TTS Data Analysis software of TA-instruments for a given temperature. Storage modulus showed a linear relationship with glass fiber content when components were held to temperatures near to their respective glass transition temperature, obtained from the maximum of loss modulus curve with temperature. In summary, the value and evolution of dynamic moduli of PBT samples improved with glass fiber content, allowing us to increase the durability of components when they are submitted to high-temperature environments.

【 授权许可】

Unknown