The Influence of Viscosity Ratio on Polypropylene/Polyamide 6 Blend Fibers Irradiated by Ultraviolet Light
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Accession number;03A0429440
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| Title;The Influence of Viscosity Ratio on Polypropylene/Polyamide 6 Blend Fibers Irradiated by Ultraviolet Light |
| Author;
TAKAHASHI TETSUYA
(Shimane Univ., Fac. of Educ.)
KONDA ATSUO
(Shinshu Univ., Textile Sci. and Technol., JPN)
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Journal Title;Fiber
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Journal Code:F0278A
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ISSN:0037-9875
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VOL.59;NO.6;PAGE.222-229(2003)
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| Figure&Table&Reference;FIG.8, TBL.7, REF.14 |
| Pub. Country;Japan |
| Language;Japanese |
| Abstract;A study was conducted on the effects of ultraviolet (UV) irradiation by a xenon lamp on the structure and mechanical properties of PP/PA6 blend fibers. B-2 blend fibers, which have a viscosity ratio (.ETA.PP/.ETA.PA6) lower than 1, show a small dropoff in tensile strength up to 300 hr of irradiation time. However the tensile strength decreases rapidly at 600 hr. In the E-l blend fiber, which has a viscosity ratio (.ETA.PP/.ETA.PA6) higher than 1 and the same PA6 content as in the B-2 blend fiber, tensile strength decreases slightly with UV irradiation. Next, the molecular weight of PP component in blend fiber was measured using GPC. The results indicate that the B-2 blend fiber, having a viscosity ratio (.ETA.PP/.ETA.PA6) lower than 1, shows a smaller decrease of molecular weight by UV irradiation than the E-l blend fiber. These results suggest that in the B-2 blend fiber, the degradation of PP component is controlled, because the two components of B-2 blend fiber are dispersed to distugh the penetration of UV light. Although the tensile strength of B-2 blend fiber decreases more largely with UV irradiation than that of E-1 blend fiber, the molecular weight of PP component in E-1 blend fiber degreases more largely than that in B-2 blend fiber. Since the PA6 component of the E-1 blend fiber is formed as the continuous phase, the decreases in tensile strength and strain of E-1 blend fiber with UV irradiation might be smaller than those of B-2 blend fiber. Moreover, the thermal behaviors of fibers irradiated with UV light were investigated using DSC. Though two endothermic peaks are observed near the melting point of PA6 component in B-2 blend fiber, the endothermic peak at the higher temperature side is lowered by UV irradiation. And the two melting endothermic peaks of the PA6 component change to a single peak. In both blend fibers, the endothermic peak temperature of the PP component is lowered by UV irradiation. (author abst.) |
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