Effects of Polyethylene on the Morphologye, Barrier and Impact Properties of Polyethylene/Modified Polyamide Blends

• Main Author: 簡朝發
• Other Authors: 葉正濤
• Format: Others
• Language: zh-TW
• Published: 1997
• Online Access: http://ndltd.ncl.edu.tw/handle/46697439104610273532

碩士 === 國立臺灣科技大學 === 纖維及高分子工程技術研究所 === 85 === An investigation of the influence of the melt shear viscosities of polyethylenes (PE) on the morphology, barrier and impact properties of polyethylene/modified polyamide PE/MPA bottles is reported. The melt shear viscosities of polyethylenes exhibited a significant influence on the deformation and morphology of MPAs during blow-molding process of polyethylene/modified polyamide (PE/MPA) blends. Some obscure MPA laminars were observed in PE/MPA bottles as the value of melt shear viscosity ratio of MPA to PE (VR) deviated significantly from the "optimum" range. In contrast, clear and elongated laminar structures of MPAs were found as the value of VR reached the "optimum" range. Similarly, the total impact energies (Ets) and permeation barrier properties of PE/MPA samples improved with the value of VR until it reached the "optimum" range, after which value Ets and permeation barrier properties of PE/MPA samples reduced significantly with further increasing VR. Possible mechanisms accounting for these interesting behaviors are presented in this study.