A novel star-shaped poly(carboxylic acid) for resin-modified glass-ionomer restoratives.
A novel star-shaped poly(carboxylic acid) for resin-modified glass-ionomer restoratives.
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一种用于树脂改性玻璃离聚物修复剂的新型星形聚（羧酸）。
DOI：
10.1080/09205063.2014.920169
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发表时间：
2014
期刊：
影响因子：
--
通讯作者：
Xie,D
中科院分区：
文献类型：
--
作者：
Weng,Y;Howard,L;Xie,D
我们开发了一种新型玻璃离子水门汀（GIC）系统，由光固化星形聚（丙烯酸-衣康酸）组成。这些多元酸是使用新合成的多臂链转移剂通过链转移自由基聚合合成的。与线性多元酸相比，星形多元酸在水中表现出显着较低的粘度。由于粘度较低，可以显着增加多元酸的分子量（MW），以增强机械强度，同时保持易于混合和处理。 MW、GM束缚比、P/L比和老化对实验水泥的抗压性能影响显着。光固化实验水泥的机械强度显着提高，即屈服强度提高 49%，模量提高 41%，CS 提高 25%，DTS 提高 20%，FS 提高 36%，高于商用 Fuji II LC。水中老化1个月后，新型光固化实验水泥的抗压强度达到343MPa，分别比Fuji II和Fuji II LC高34%和42%。这种老化一个月的实验水泥在老化一天后也比本身高出 23%，这表明在水中老化可以显着增强这种新型星形聚酸包含的 GIC 的盐桥形成。
We have developed a novel glass-ionomer cement (GIC) system composed of photo-curable star-shaped poly(acrylic acid-co-itaconic acid)s. These polyacids were synthesized via a chain-transfer radical polymerization using a newly synthesized multi-arm chain-transfer agent. The star-shaped polyacids showed significantly lower viscosities in water as compared to the linear polyacids. Due to the lower viscosities, the molecular weight (MW) of the polyacids can be significantly increased for enhancing the mechanical strengths while keeping the ease of mixing and handling. The effects of MW, GM-tethering ratio,P/Lratio, and aging on the compressive properties of the experimental cements were significant. The light-cured experimental cements showed significantly improved mechanical strengths i.e. 49% in yield strength, 41% in modulus, 25% in CS, 20% in DTS, and 36% in FS, higher than commercial Fuji II LC. After aging in water for 1 month, the compressive strength of the novel light-cured experimental cement reached 343 MPa, which was 34% and 42% higher than Fuji II and Fuji II LC, respectively. This one-month aged experimental cement was also 23% higher than itself after one day aging, indicating that aging in water can significantly enhance salt-bridge formation for this novel star-shaped polyacid-comprised GIC.