Elastomers and Composites

The Rubber Society of Korea (한국고무학회)
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Effects of Silicone Polymer Blends on Physical Properties of Dental Polyvinylsiloxane Impression Materials

실리콘폴리머의 혼합사용이 폴리비닐실록산 치과용 인상재의 물성에 미치는 영향

  • Lim, Chang-Ha (Dept. of Dental Materials and Dental Materials Research Institute, School of Dentistry, Chonnam National University) ;
  • Kim, Min-Kang (Dept. of Dental Materials and Dental Materials Research Institute, School of Dentistry, Chonnam National University) ;
  • Kim, Young-Chul (Faculty of Applied Science and The Research Institute for Catalyst, Chonnam National University) ;
  • Park, Nam-Cook (Faculty of Applied Science and The Research Institute for Catalyst, Chonnam National University) ;
  • Song, Ho-Jun (Dept. of Dental Materials and Dental Materials Research Institute, School of Dentistry, Chonnam National University) ;
  • Park, Yeong-Joon (Dept. of Dental Materials and Dental Materials Research Institute, School of Dentistry, Chonnam National University)
  • 임창하 (전남대학교 치의학전문대학원 치과재료학교실 및 치과재료연구소) ;
  • 김민강 (전남대학교 치의학전문대학원 치과재료학교실 및 치과재료연구소) ;
  • 김영철 (전남대학교 응용화학공학부 및 촉매연구소) ;
  • 박남국 (전남대학교 응용화학공학부 및 촉매연구소) ;
  • 송호준 (전남대학교 치의학전문대학원 치과재료학교실 및 치과재료연구소) ;
  • 박영준 (전남대학교 치의학전문대학원 치과재료학교실 및 치과재료연구소)
  • Published : 2009.03.30
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Abstract

The purpose of this study was to investigate the effects of combined use of several types of silicone polymers on the physical properties of the dental polyvinylsiloxane impression materials (PVS). Four types of silicone prepolymers having different molecular weight and vinyl group position, and two types of cross-linkers having differently located silyl hydride functional groups were used in various combinations for the formulation. The samples containing bimodal or trimodal prepolymers showed higher tensile strength, elongation at break, and elastic deformation than those containing only one type of prepolymer. The samples using CR210 cross-linker which has side- and terminal-silyl hydride groups showed higher elastic deformation and elongation at break than those using CR101 cross-liker which has side-only silyl hydride group. High vinyl content prepolymer having side vinyl group delayed setting even though it enhanced tensile strength. Further studies are needed to clarify the specific role of this component on setting time and to find appropriate controlling methods for making improved PVS with optimum workability.

본 연구는 비닐작용기의 위치가 다른 실리콘 프리폴리머와 수소작용기의 위치가 다른 가교제, 그리고 이들의 혼합사용이 제조된 치과용 폴리비닐실록산 고무인상재의 물성에 미치는 영향을 연구하였다. 한 종류의 중점도 프리폴리머를 사용한 실험군은 인장강도, 파단신율, 압축시 변형률이 다른 특성의 프리폴리머들을 혼합사용한 경우보다 낮은 값을 보였다. 측부와 말단에 수소작용기가 있는 CR210 가교제를 사용한 실험군은 측부에만 수소작용기가 있는 CR101 가교제를 사용한 실험군에 비해 압축시 변형률과 파단신율이 더 높았다. 측쇄에도 비닐기를 갖는 높은 비닐함량의 프리폴리머를 사용한 경우는 더 높은 인장강도를 보였지만, 경화 속도가 늦어서 임상 사용에 적합한 작업성을 갖는 치과용 인상재를 만들기 위해서는 이 성분이 경화시간에 미치는 영향과 이를 조절할 수 있는 방안에 대한 지속적인 연구가 필요하다고 생각한다.

Keywords

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