Determination of Neutralization Capacity and Stability of a Basic Methacrylate Monomer Using NMR

被引：6
|
作者：
Park, Jonggu [1 ]
Ye, Qiang [1 ]
Spencer, Paulette [1 ,2 ]
Laurence, Jennifer S. [3 ]
机构：
[1] Univ Kansas, Bioengn Res Ctr, Lawrence, KS 66045 USA
[2] Univ Kansas, Dept Mech Engn, Lawrence, KS 66045 USA
[3] Univ Kansas, Dept Pharmaceut Chem, Lawrence, KS 66045 USA
来源：
INTERNATIONAL JOURNAL OF POLYMERIC MATERIALS | 2012年 / 61卷 / 1-4期
基金：
美国国家卫生研究院;
关键词：
basic monomer; lactic acid; neutralization; nuclear magnetic resonance spectroscopy; stability; DENTIN ADHESIVES; COMPOSITE; DEGRADATION; RESTORATIONS;
D O I：
10.1080/00914037.2011.574660
中图分类号：
O63 [高分子化学（高聚物）];
学科分类号：
070305 ; 080501 ; 081704 ;
摘要：
The durability of dental resin depends on the stability of the polymer. The neutralizing capacity of a basic methacrylate monomer and its chemical stability were measured using nuclear magnetic resonance (NMR) spectroscopy. Lactic acid solution was titrated with 2-(dimethylamino)ethylmethacrylate (DMAEMA) or 2-hydroxyethylmethacrylate (HEMA) and its chemical shifts monitored. Addition of DMAEMA alters the chemical shift proportionally to pH neutralization, whereas HEMA has no impact. Chemical shifts were used to quantify both the change in pH and monomer stability. The results demonstrate that neutralization by basic monomer can be achieved and that this can be measured using an NMR assay.
引用
收藏
页码：144 / 153
页数：10
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