| 초록 |
Composite materials are made from two or more constituent materials that remain separate and distinct on a macroscopic level while forming a single component. There are two categories of constituent materials: matrix and reinforcement. The reinforcement imparts their special thermal properties to the matrix in order to enhance its properties. In this study, the effects of the filler shape on the coefficient of thermal expansion(CTE) for PP composites were analyzed by two aspect ratios and compared with the experimentally results and the theoretical approach proposed by Lee and Paul. The shapes of fillers in the composites were various, such as spherical, fiber, disc, and ellipsoid. Actually, barium sulfate, mica, talc, glass fiber were used at the fillers. The longitudinal CTE ratio, α11 / αm of PP/talc relative to that of the matrix was decreased as a function of the mica content. |
