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전분과 탄산칼슘을 포함한 HDPE 복합필름의 인장특성과 형상의 계절적 변화
Seasonal Variation of Tensile Properties and Morphology of Starch-Calcium Carbonate-HDPE Composite Film
HWAHAK KONGHAK, August 1995, 33(4), 452-461(10), NONE
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Abstract
용융혼합기를 사용하여 공기분위기에서 강한 전단력을 혼합물에 가해 분해성 master batch(M/B)룰 제조하였으며, 분해성 M/B가 40wt% 포함된 얇은 필름을 인플레이션 가공법으로 제조했다. 분해 수행은 60℃, 공기분위기에서 열에 의한 노화와 자외선 발생기 및 옥외에서의 UV에 의한 노화, 35℃ 항온에성의 수중침지에 의한 노화를 수행했다. 각 계절별 영향은 인장 물성과 표면형상 변화를 살펴보았다. 자외선 조사기로 건조상태 및 젖은 상태 필름에 자외선을 조사하여 수분의 영향을 관찰했다. 수분은 필름의 UV에 의해 분해에 영향을 미침을 관찰하였다. 광분해속도는 여름의 경우가 다른 계절에 비해 빠른 것으로 나타났다.
Degradable master batch(M/D) was prepared using mechanical oxidation during melt mixing process with high shear and under the presence of air. High density polyethylene(HDPE) thin film containing 40wt% of degradable M/B was prepared by inflation film processing. The degradation of thin film has been studied with thermal aging in air environment at 60℃, UV aging in an artificial weather-0-meter, outdoor exposure and water soaking aging at 35℃. Seasonal effect was examined by the loss of tensile properties and by morphology change obtained with scanning electron microscopy(SEM). The effect of water on UV degradation was examined by an artificial weather-O-meter. It was noted that water affects the UV degradation of film. The decrease of tensile properties in summer was observed to be faster than that of the other seasons.
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