DCP가교 및 열연신 조건이 초고분자량 폴리에틸렌 필름의 물리적 성질에 미치는 영향 Effects of Crosslinking with Dicumyl Peroxide and Hot Drawing Condition on the Physical Properties of Ultra-High Molecular Weight Polyethylene원문보기
본 연구에서는 고강력 고탄성률을 나타내는 초고분자량 폴리에틸렌 필름을 제조한 후 이 필름의 비파단일을 향상시키기 위하여 가교제로 DCP 를 사용하여 여러가지 농도의 DCP - Decaline 용액을 만든 후 침지시간별로 가교제를 도입시키고, 이 시료를 열연신하여 가교제 및 열연신 조건이 초고분자량 초고분자량 폴리에틸렌 필름을 제조한 후 이 필름의 비파단일을 향상시키기 위하여 가교제로 DCP 를 사용하여 여러가지 농도의 DCP - Decaline 용액을 만든 후 침지시간별로 가교제를 도입시키고, 이 시료를 열연신하여 가교제 및 열연신 조건이 초고분자량 폴리에틸렌 필름의 물성에 미치는 영향에 대하여 실험 고찰하여 다음과 같은 결론을 얻었다. 초고분자량 폴리에틸렌으로의 DCP 흡착은 24 시간내 충분히 이루어졌으며, DCP 용액의 농도가 클수록 흡착된 DCP 의 평형치는 증가하였으며, 평형에 도달하는 흡작속도가 빨랐다. 순수한 초고분자량 폴리에틸렌은 연신비에 관계없이 용융점의 변화가 거의 없었으나 DCP 용액에 침지된 초고분자량 폴리에틸렌 필름은 용융점이 직선적으로 증가하였다. DCP 용액의 농도가 클수록 절단응력은 감소하였으며 절단변형률은 직선적으로 증가하였다. 초기탄성률은 연신비 2 까지 감소하다가 이후 증가하였으며, 연신비의 증가에 따라 절단응력은 직선적으로 증가하였으며 절단변형률은 감소하였다. 비파단일은 미연신시료의 경우 DCP 용액의 농도가 클수록 증가하였으며, 비파단일의 증가를 위해서는 가교제의 도입뿐만 아니라, 어느 정도의 연신이 반드시 필요하였다.
본 연구에서는 고강력 고탄성률을 나타내는 초고분자량 폴리에틸렌 필름을 제조한 후 이 필름의 비파단일을 향상시키기 위하여 가교제로 DCP 를 사용하여 여러가지 농도의 DCP - Decaline 용액을 만든 후 침지시간별로 가교제를 도입시키고, 이 시료를 열연신하여 가교제 및 열연신 조건이 초고분자량 폴리에틸렌 필름의 물성에 미치는 영향에 대하여 실험 고찰하여 다음과 같은 결론을 얻었다. 초고분자량 폴리에틸렌으로의 DCP 흡착은 24 시간내 충분히 이루어졌으며, DCP 용액의 농도가 클수록 흡착된 DCP 의 평형치는 증가하였으며, 평형에 도달하는 흡작속도가 빨랐다. 순수한 초고분자량 폴리에틸렌은 연신비에 관계없이 용융점의 변화가 거의 없었으나 DCP 용액에 침지된 초고분자량 폴리에틸렌 필름은 용융점이 직선적으로 증가하였다. DCP 용액의 농도가 클수록 절단응력은 감소하였으며 절단변형률은 직선적으로 증가하였다. 초기탄성률은 연신비 2 까지 감소하다가 이후 증가하였으며, 연신비의 증가에 따라 절단응력은 직선적으로 증가하였으며 절단변형률은 감소하였다. 비파단일은 미연신시료의 경우 DCP 용액의 농도가 클수록 증가하였으며, 비파단일의 증가를 위해서는 가교제의 도입뿐만 아니라, 어느 정도의 연신이 반드시 필요하였다.
The effect of cross-linking agent and hot drawing conditions on the thermal and physical properties of UHMW PE film known as high strength, high modulus polymer material was examined. As the concentration of DCP solution was increased, the equilibrium DCP take-up was increased and the adsoption rate...
The effect of cross-linking agent and hot drawing conditions on the thermal and physical properties of UHMW PE film known as high strength, high modulus polymer material was examined. As the concentration of DCP solution was increased, the equilibrium DCP take-up was increased and the adsoption rate to equilibrium state was increased. The melting temperature of homogeneous UHMW PE film was not changed, but that of UHMW PE film treated by the DCP solution was linearly increased as the draw ratio was increased. The elastic modulus of UHMW PE treated by the DCP solution was increased as the concentration of the DCP solution was increased and decreaed to draw ratio 2, thereafter increased as the draw ratio was increased. The breaking stress of UHMW PE treated by the DCP solution was decreased as the concentration of DCP solution was increased. The breaking strain of UHMW PE treated by the DCP solution was increased as the concentration of the DCP solution was increased and drastically decreaed to draw ratio 3, thereafter not changed as the draw ratio was increased. The work of rupture of undrawn UHMW PE film was increased as the concentration of DCP solution was increaed. To increase the work of rupture, it is necessary to draw UHMW PE film to the some extent as well as introducing cross-linking agent to UHMW PE film.
The effect of cross-linking agent and hot drawing conditions on the thermal and physical properties of UHMW PE film known as high strength, high modulus polymer material was examined. As the concentration of DCP solution was increased, the equilibrium DCP take-up was increased and the adsoption rate to equilibrium state was increased. The melting temperature of homogeneous UHMW PE film was not changed, but that of UHMW PE film treated by the DCP solution was linearly increased as the draw ratio was increased. The elastic modulus of UHMW PE treated by the DCP solution was increased as the concentration of the DCP solution was increased and decreaed to draw ratio 2, thereafter increased as the draw ratio was increased. The breaking stress of UHMW PE treated by the DCP solution was decreased as the concentration of DCP solution was increased. The breaking strain of UHMW PE treated by the DCP solution was increased as the concentration of the DCP solution was increased and drastically decreaed to draw ratio 3, thereafter not changed as the draw ratio was increased. The work of rupture of undrawn UHMW PE film was increased as the concentration of DCP solution was increaed. To increase the work of rupture, it is necessary to draw UHMW PE film to the some extent as well as introducing cross-linking agent to UHMW PE film.
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