摘要双酚A-双甲基丙烯酸缩水甘油酯（Bis-GMA）是目前使用最广泛的牙科修复树脂基质, Bis-GMA虽然有着良好的机械性能，色泽逼真，但其光固化过程中引起的体积收缩容易导致继发龋的产生，所以减小树脂的体积收缩一直是牙科修复领域研究的热点。高分子量的超支化聚酯有减小收缩的潜力。
本文首先用季戊四醇与2，2-二羟甲基丙酸高温熔融缩合末端含16个羟基的Boltorn型超支化聚酯，然后用甲基丙烯酰氯对其端羟基进行改性，在HBP末端引入双键，并用傅里叶红外光谱和核磁共振氢谱对其结构进行表征。然后在传统的牙科修复树脂体系Bis-GMA/TEGDMA中引入不同质量分数的改性后超支化聚酯HBPS，考察其对树脂体系收缩率和双键转化率的影响。实验结果表明，收缩率随着树脂体系中HBPS含量的增多而减小，当HBPS含量为40%时，其体积收缩率最小可降至 4.41%；HBPS的含量在30%以下时，复合树脂体系的双键转化率变化不明显。19113
关键词 ：牙科修复树脂 光固化 超支化聚合物 体积收缩率 双键转化率
毕业论文设计说明书（论文）外文摘要
Title Hyperbranched polymerization of monomers design, synthesis and repair resins used in dentistry
Abstract
Bisphenol-A-diglycidyl methacrylate (Bis-GMA) and its derivatives are the most widely used dental restorative resin at present. Although Bis-GMA has good mechanical properties, color fidelity, but the Volumetric shrinkage reduction caused by the UV curing process is easy to cause secondary caries, so reducing the volume shrinkage of resin has been a hot research field of dental restoration.
First, Pentaerythritol and 2,2-Bis(hydroxymethyl) propionic acid were melt polycondensation to get a Organic compound which contains 16 Carboxyl-terminated hyperbranched polyester with a high temperature. Then modified its terminal hydroxyl groups with methacryloyl chloride to get a double-bound HBP, and their chemical structure were characterized by FT-IR and NMR. Polymerization shrinkage and number of C=C bonds converted per volume unit were measured in order to verify the changes in those two characters when each kind of modified HBP was added into mixed resins. The experimental results show that, the amount of modified HBP in the mixed resin was increased, the volume shrinkage decreased gradually , When the content of HBPS is 40%, the volume shrinkage reduced to 4.41%; the content of HBPS below 30%, the number of C=C bonds converted per volume unit have no obvious change.
Key words: Dental restorative resin light-cure Hyperbranched polymers volume shrinkage C=C bonds converted
目 录
1 绪论 1
1.1 牙科修复树脂的研究现状 1
1.1.1 树脂基体 2
1.1.2 无机填料 4
1.1.3光引发体系 5
1.1.4 新型树脂体系的开发 5
1.2 超支化聚合物的现状 6
1.2.1 超支化聚合物的定义与结构特征 6
1.2.2 超支化聚合物的性质 7
1.3 超支化聚合物的合成与改性 8
1.3.1 合成方法 8
1.3.2 超支化聚合物的改性 9
1.4本文章研究目的 9 超支化聚合单体的设计合成及其在牙科修复树脂中的应用:http://www.751com.cn/huaxue/lunwen_10331.html