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Studies on Molecular Structure Changes in Polyethylene/Polypropylene Sheath-Core Monofilament
서영호,임영민,오태환,한성수,남영식,남승민,함진수,Seo, Young Ho,Lim, Young Min,Oh, Tae Hwan,Han, Sung Soo,Nam, Young Sik,Nam, Seung Min,Ham, Jin Soo The Korean Fiber Society 2014 한국섬유공학회지 Vol.51 No.2
In this study, changes in the molecular structure of a sheath-core polyethylene (PE)/polypropylene (PP) bicomponent monofilament were investigated using different fractions of sheath or core components. The melt complex viscosity of sheath PE showed a greater shear thinning behavior than core PP. For both as-spun and drawn filaments, the crystal structure of sheath PE developed better than that of core PP. In the as-spun monofilament, the core PP crystal structure did not develop well, while sheath PE showed a more developed crystal structure. Further, sonic velocity indicating the molecular orientation increased upon drawing but was rarely dependent on the sheath PE fraction for both as-spun and drawn monofilaments.