Improved Flexural Strength of N-Vinyl-Pyrrolidone Modified Acrylic Acid Copolymers for Glass-Ionomers
Improved Flexural Strength of N-Vinyl-Pyrrolidone Modified Acrylic Acid Copolymers for Glass-Ionomers
复制标题
用于玻璃离子聚合物的 N-乙烯基吡咯烷酮改性丙烯酸共聚物的弯曲强度得到改善
DOI：
10.1080/10601329808000975
复制
发表时间：
1998
期刊：
影响因子：
--
通讯作者：
W. Johnston
中科院分区：
文献类型：
--
作者：
D. Xie;B. M. Culbertson;W. Johnston
摘要 研究了 N-乙烯基吡咯烷酮改性玻璃离子水门汀的弯曲强度。使用SAS统计程序确定了由丙烯酸、衣康酸和N-乙烯基吡咯烷酮三种组分组成的共聚物中单体的最佳摩尔比。该共聚物是采用自由基聚合工艺制备的。测定这些聚合物的水溶液的粘度。这些溶液与玻璃颗粒反应形成水泥。使用弯曲强度（FS）作为基本筛选性能来寻找最佳摩尔比。应用统计模型来预测最佳摩尔比。所有强度值均记录在 37°C 蒸馏水中处理 7 天的样品上。根据弯曲强度和粘度，这些共聚物的最佳摩尔比为聚（丙烯酸-衣康酸-N-乙烯基吡咯烷酮）7:1:3。还评估了分子量 (MW) 对 FS 的影响。共聚物与...
Abstract The flexural strengths of N-vinylpyrrolidone modified glass-ionomer cements were investigated. The optimal molar ratio of the monomers in copolymers, composed of the three components acrylic acid, itaconic acid and N-vinylpyrrolidone, was determined using a SAS statistical program. The copolymers were prepared using a free-radical polymerization process. The viscosities of aqueous solutions of these polymers were determined. Cements were formed by the reaction of these solutions with glass particles. Flexural strength (FS) was used as the basic screening property to find the optimum molar ratio. Statistical models were applied to predict the optimum molar ratios. All strength values were recorded on the specimens conditioned in distilled water at 37°C for 7 days. The optimal molar ratio for these copolymers was 7:1:3 for poly(acrylic acid-co-itaconic acid-co-N-vinylpyrrolidone), based on flexural strength and viscosity. The effect of molecular weight (MW) on FS was also evaluated. Copolymer with ...