Polymer(Korea), Vol.18, No.4, 613-621, July, 1994
전분과 탄산칼슘을 포함한 고밀도 폴리에틸렌 필름의 광분해 및 생분해
Photo-and Bio-degradation of High Density Polyetylene Film Containing Starch and Calcium Carbonate
초록
전분과 탄산칼슘이 포함된 고밀도 폴리에틸렌 필름과 순수한 고밀도 폴리에틸렌 필름의 광분해 및 생분해성을 각각 살펴보았다. 광분해성을 관찰하기 위해 두 필름을 태양광 아래 노출시켰다. 필름의 분해 정도는 인장물성 감소와 열적 성질 감소로 분석했다. 표면 형상학은 전자현미경을 사용하여 관찰했다. 생분해 실험은 인큐베이터 및 토양 매립 실험을 동시에 실시했다. 전분과 탄산칼슘이 포함된 고밀도 폴리에틸렌 필름은 태양광 아래 28일간 노출시 초기 신도의 99%를 상실했으며 매우 취약해 졌다. 토양 매립 실험에서 전분과 탄산칼슘이 포함된 고밀도 폴리에틸렌 필름은 3개월이 경과후 6%의 무게 감소를 나타내었으며 인큐베이터 시험에서는 35일 후 약 10%의 무게 감소를 보였다.
Photodegradabilities and biodegradabilities were observed for high density polyethylene(HDPE) film containing starch and calcium carbonate and pure HDPE film, respectively. Two films were exposed to the sunlight to observe the photodegradability. The degradability of films were determined by the loss of tensile properties and thermal properties. The surface morphology was examined by Scanning Electron Microscopy(SEM). In the case of biodegradation test, incubator test and soil burial test were performed simultaneously. HDPE film containing starch and calcium carbonate lost about 99% of its original elongation after 28-days-exposure to sunlight, and was very brittle. Weight loss was 6 wt% after 3 months soil burial test, and in the case of incubator test the weight loss was 10 wt% after 35 days.
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