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Study on novel composite resin with a low shrinking force during hardening

新型低硬化收缩力复合树脂的研究

基本信息

批准号：
02670875
负责人：
NEMOTO Kimiya
金额：
$ 1.41万
依托单位：
Nihon University
依托单位国家：
日本
项目类别：
Grant-in-Aid for General Scientific Research (C)
财政年份：
1990
资助国家：
日本
起止时间：
1990 至 1991
项目状态：
已结题

项目摘要

1. Novel method was designed to obtain the micro cross-linked polymer particle using solution polymerization of cross-linking monomer in ethanol, and it's polymerization mechanism was clarified.2. The cross-linked polymer particle whose diameter is 0.5mum, was mixed with the micro globule silica particle (MF). The resin of a heat-cured type was prepared using the mixed filler. After hardening, it's abrasion loss was measured.3. The micro capsule particle (MCPF) of the cross-linked polymer containing the MF was designed using the method as mentioned above. The composite resin of a self-cured type was prepared using MCPF and MF as filler, and the mechanical properties of it's hardening was measured.4. Four kinds of composite resins of a self-cured type was prepared using MCPF, an irregular silica or a globule silica as filler. The shrinking force of the composite resin during hardening was measured with the apparatus which was prepared last year to measure the shrinking force of a resin during hardening.5. The effect of the shape, the size and the content of silica filler in composite resin on the shrinking force was investigated.5-1 The shrinking force of the composite resin based on an irregular silica is larger than that based on a globule silica.5-2 The content of a globule silica particle is higher than an irregular silica particle as filler. However, the shrinking force increases with increasing the silica content.5-3 As the size of silica is larger, the shrinking force become smaller.5-4 As the setting time of resin become later, the shrinking force become smaller.5-5 The parameter to control the shrinking force of composite resin during hardening is discussed using the datas as mentioned above.

1．设计了交联单体在乙醇中溶液聚合获得微交联聚合物颗粒的新方法，并阐明了其聚合机理。 2．将直径为0.5μm的交联聚合物颗粒与微球二氧化硅颗粒(MF)混合。使用混合填料制备热固化型树脂。硬化后测定其磨损量。 3．使用上述方法设计了含有MF的交联聚合物的微胶囊颗粒(MCPF)。以MCPF和MF为填料制备了自固化型复合树脂，并测定了其固化后的力学性能。 4．以MCPF、不规则二氧化硅和球状二氧化硅为填料，制备了四种自固化型复合树脂。采用去年研制的树脂固化收缩力测定装置测定了复合树脂固化时的收缩力。 5．研究了复合树脂中二氧化硅填料的形状、尺寸和含量对收缩力的影响。5-1 以不规则二氧化硅为基础的复合树脂的收缩力大于以球状二氧化硅为基础的复合树脂。5-2 以球状二氧化硅颗粒作为填料的含量高于以不规则二氧化硅颗粒为填料的收缩力。然而，收缩力随着二氧化硅含量的增加而增加。5-3随着二氧化硅尺寸的增大，收缩力变小。5-4随着树脂凝固时间变晚，收缩力变小。5-5使用上述数据讨论了控制复合树脂在硬化过程中收缩力的参数。