Mechanical Properties Optimization of BIS-GMA/Silica Composite using Experimental Design
Jang J, Kim SW
실험계획법을 이용한 BIS-GMA/실리카 복합재료의 물성 최적화
장정식, 김상우
Abstract
Dental composites were fabricated as microfilled composite, and experimental design has been carried out by using the important factors affecting mechanical properties of composites. BIS-GMA/silica composite has been selected as microfilled composite, and flexural strength and modulus were estimated as mechanical characteristic values. Heat treatment temperature, silane coupling agent concentration, silica content, and crosslinking agent concentration were considered as important factors, and experimental design and Taguchi method have been simultaneously carried out and compared by using orthogonal array. Among these factors, flexural strength was mainly affected by silane coupling agent concentration, and flexural modulus by silica content. From these results, optimal level combinations and predicted values of mechanical properties were obtained.
Microfilled composite로 치아용 복합재료를 제조한 후 복합재료의 기계적 물성에 영향을 주는 인자들을 선정하여 실험계획법을 수행하였다. Microfilled composite로는 BIS-GMA/실리카 복합재료를 사용하였고 기계적 특성치로 굴곡 강도와 굴곡 탄성율을 측정하였다 열처리 온도, 실란 카플링제 농도, 실리카 함량, 경화제 농도 등이 기계적 특성치에 대한 중요한 인자로 고려되었으며 직교 배열표를 이용한 실험계획법과 품질 관리 기법인 다구찌 방법을 동시에 수행하여 비교, 분석하였다. 위의 인자중 굴곡 강도는 실란 카플링제 농도에 의해, 굴곡 탄성율은 실리카 함량에 의해 가장 큰 영향을 받는 것으로 나타났으며 이 결과를 통해 이들 인자의 최적 수준 조합과 물성의 예측값을 구하였다.
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