熱塑性超高分子量聚乙烯纖維複合材料之研究

Abstract

本研究引入熱塑性聚胺基甲酸酯及低密度聚乙烯為基材，並以深具市場潛力的超高分子量聚乙烯纖維為補強材，並分別以溶液含浸法及總體含浸法對不同的樹脂系統加工，利用纏繞成型法將原料加工成預浸材料，再以熱壓成型法二次加工後，製成複合材料，並對其熱性質、纖維重量分率、機械性質、形態學分析討論。 熱性質方面，以LDPE為基材的複合材料其熱烈解溫度較高；並可以由TGA圖及DSC圖計算纖維重量分率。 纖維重量分率可由熱洗法、TGA圖、DSC圖分別求得並比較，以求準確性，複合材料纖維重量分率最高可達50%以上。 機械性質可由單層預浸布量測出，最高可達到598MPa；落鎚式耐衝擊測試可達儀器測試高度極限，複材中纖維完全無斷裂現象，展現出優越耐衝擊性質；本研究製成的複合材料性質良好，未來如能商業化，潛力可期。 關鍵字: 超高分子量聚乙烯纖維、低密度聚乙烯、聚胺基甲酸酯、纖維重量分率、機械性質

The aim of this Research is to prepare the LDPE (low density polyethylene), PU (polyurethane) and UHMWPE fiber composites for improving the mechanical properties of the LDPE/UHMWPE fiber and PU/UHMWPE fiber composites. In the matrix, several types of LDPE and PU are employed to improve the adhesion between the UHMWPE fiber and the matrix. The LDPE/UHMWPE fiber composites and PU/ UHMWPE fiber composites were prepared by filament winding. The types of impregnation were used in different resin types included solution impregnation and bulk impregnation. Fiber weight content could be calculated by TGA analysis, DSC analysis, and solvent etching. The fiber weight content of the composite is more than 50%. The tensile strength could achieve 598MPa. Crack initiation energy, crack propagation energy, and ductility index (D.I=Ep/Ei) of PU/UHMWPE fiber composites could be obtained by falling weight impact test. The thermal properties, mechanical properties, and morphology of the different composites were investigated through the TGA measurement and DSC measurement , Tensile strength test ,Falling weight impact test and the scanning electron microscope(SEM), respectively. Keywords：UHMWPE fiber, LDPE, PU, fiber weight content, falling weight test, and mechanical properties