• Journal of the Korea Academia-Industrial cooperation Society
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• v.15 no.2
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• pp.660-665
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• 2014

Optimization of process parameters in polymer extrusion is an important task to reduce manufacturing cost. To determine the optimum values of the process parameters, it is essential to find their influence on the elongation of polymer breathable thin film. The significance of six important process parameters namely, extruder cylinder temperature, extruder speed, extruder dies temperature, cooling roll temperature, stretching ratio, stretching roll temperature on breathable film elongation of polymer extrusion was determined. Moreover, this paper presents the application of Taguchi method and analysis of variance(ANOVA) for maximization of the breathable film elongation influenced by extrusion parameters. The optimum parameter combination of extrusion process was obtained by using the analysis of signal-to-noise ratio. The conclusion revealed that stretching ratio were the most influential factor on the film elongation. The best results of film elongation were obtained at lower stretching ratio.

• Polymer(Korea)
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• v.27 no.5
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• pp.405-412
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• 2003

Poly(vinyl alcohol) (PVA) and N-(2-hydroxy)propyl-3-trimethylammonium chitosan chloride (HTCC), a water soluble chitosan derivative synthesized by the reaction of quaternary ammonium compound with chitosan, were blended using water as a solvent and the PVA/HTCC blend films with various compositions were prepared by solution casting method. The miscibility between the two polymers and the thermal properties of the blend films were investigated using FT-IR, DSC, DMA, and TGA. Single glass transition temperatures and single melting temperatures of the blend films along with the strong and clear film state for the whole composition of blending ratios suggest the miscibility between PVA and HTCC. The PVA/HTCC blend films with HTCC content of 1% and greater showed excellent antimicrobial activity.

• Polymer Science and Technology
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• v.14 no.6
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• pp.691-698
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• 2003

• Polymer Science and Technology
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• v.14 no.2
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• pp.163-173
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• 2003

• Polymer Science and Technology
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• v.14 no.2
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• pp.174-180
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• 2003

• Polymer Science and Technology
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• v.14 no.2
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• pp.181-191
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• 2003

• Polymer Science and Technology
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• v.14 no.2
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• pp.192-199
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• 2003

• Polymer Science and Technology
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• v.12 no.2
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• pp.197-209
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• 2001

• Polymer Science and Technology
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• v.12 no.2
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• pp.223-232
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• 2001

• Proceedings of the Korean Fiber Society Conference
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• 1998.04a
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• pp.126-129
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• 1998

전기 전도성 고분자는 전하 이동체의 종류에 따라 이온과 전자 전도성 고분자로 구분되며 전자 전도성 고분자는 절연체인 고분자에 전도체를 혼합하는 전도성복합체와 본질적으로 전도성을 갖는 고분자로 나뉘어진다. 전도성복합체는 제법이 간단하여 이미 전기ㆍ전자산업에 많이 이용되고 있지만 일정한 전도도의 유지와 가공성 향상 및 염가의 제품 제조는 아직 과제로 남아있다.(중략)