摘要
以聚双酚A二甲基丙烯酸缩水甘油酯/聚甲基丙烯酸甲酯共混体系为基体,以玻璃纤维为增强相,采用优化的纤维浸润—热预聚—拉挤成型等工艺,制备出了具有可塑性的光固化型玻璃纤维/树脂复合材料。通过玻璃化转变温度考察了共混体系的相容性,用扫描电子显微镜观察了共混体系断口的微观形貌,用三点弯曲试验考察了共混体系和复合材料的力学性能。结果表明,在聚双酚A二甲基丙烯酸缩水甘油酯/聚甲基丙烯酸甲酯=80/20的共混体系中浸入74.1%(质量分数,下同)的玻璃纤维,在80℃下热聚合2 h,再经1.0 cm/min的匀速拉挤成型,最后通过可见光固化60 s,此工艺下制备出的复合材料的弯曲强度达到648.01 MPa,弯曲模量达到33.12 GPa,更接近牙本质。
A new type of fiber-reinforced thermoplastic composite for dental endodontic post was prepared, in which a blend of poly（bisphenol A glycidyl dimethacrylate）/poly（methyl methacrylate） （PBGD/PMMA） was used as the matrix and glass fiber as reinforcer. The composite was characterized using glass transition temperature determination, SEM observation, and three-point bending test. The optimal preparation process was as follows： 74.1 wt % of glass fiber was impregnated with a mixture of monomers （BGD/MMA=80/20w）, after a pre-polymerization at 80℃ for 2 h, the prepreg was pultruded at 1.0 cm/min and subsequently photopolymerized for 60 s. Thus obtained composite gave rise to a bending strength of 648.01 MPa and a bending modulus of 33.12 GPa, which was close to those of dentin.
出处
《中国塑料》
CAS
CSCD
北大核心
2010年第5期43-47,共5页
China Plastics
基金
吉林省科技发展计划项目白求恩医学基金(200705418)
关键词
根管桩
玻璃纤维
复合材料
力学性能
endodontic post
glass fiber
composite
mechanical property
作者简介
联系人，hujian1973@163．com
