Effects of adhesive, base and diluent monomers on water sorption and conversion of experimental resins
Effects of adhesive, base and diluent monomers on water sorption and conversion of experimental resins
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DOI：
10.1016/j.dental.2010.03.011
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发表时间：
2010-07-01
期刊：
影响因子：
5
通讯作者：
Floyd, Cynthia J. E.
中科院分区：
文献类型：
--
作者：
Dickens, Sabine H.;Flaim, Glenn M.;Floyd, Cynthia J. E.
目标.通过改变均苯四甲酸甘油二甲基丙烯酸酯（PMGDM）和各种共聚单体的浓度，建立树脂组成和树脂亲水性（由溶解度参数和log P表示）与设计用于粘合剂的树脂混合物的吸水性（WS）、溶解度和双键转化度（DC）的关系。制备了16种PMGDM质量分数为（30-70）%的树脂混合物。在给定的PMGDM浓度下，存在具有增加的log P的多达五种组合物。将聚合物盘（13 mm X 0.7mm）暴露于96%相对湿度（RH）以测定在潮湿气氛中的水吸附（WSH），随后浸入水中以测定浸入水吸附（WSI）和溶解度。采用近红外光谱法检测DC。WSI略高于WSH，其范围为（2.1 - 5.3）质量分数%。两个数据均与PMGDM浓度[Pearson相关性，p < 0.02; R-2 = 0.74，0.73（WSI）]和溶解度（R-2 = 0.64）正相关，但与log P不相关。具有双酚A核的基础树脂（B组）、含有稀释剂单体的O组或含有氨基甲酸酯二甲基丙烯酸酯的U组，各组内的WS与log P呈负相关，R-2分别为0.98、0.81、0.95，WS/溶解度相关性分别改善，R-2分别为0.88、0.92和0.75。溶解度范围为0.3%~ 2.3%，与DC呈负相关（r = -0.872）。转化率范围为41%至81%，对于具有高基础单体浓度的树脂较低，并且在与UDMA的混合物中最高。对数P是一个很好的预测WS分组后，树脂的功能，组成和结构的相似性。从Hoy的溶解度参数和其他物理树脂性质合理地预测WS和转化率。(C)2010年牙科材料学院。由爱思唯尔有限公司出版。保留所有权利。
Objectives. To establish the relationship of resin composition and resin hydrophilicity (indicated by solubility parameters and log P) to water sorption (WS), solubility, and degree of double bond conversion (DC) of resin mixtures designed for adhesive restoratives by varying the concentration of pyromellitic glycerol dimethacrylate (PMGDM) and various co-monomers.Methods. Sixteen resin mixtures were prepared with (30-70) mass fraction % PMGDM. At given PMGDM concentrations there were up to five compositions with increasing log P. Polymer disks (13 mm x 0.7 mm) were exposed to 96% relative humidity (RH) to determine water sorption in humid atmosphere (WSH) and subsequently immersed in water for immersion water sorption (WSI) and solubility. DC was assessed by near infrared spectroscopy.Results. WSI was somewhat higher than WSH, which ranged from(2.1 to 5.3) mass fraction %. Both data were positively correlated to PMGDM concentrations [Pearson correlation, p < 0.02; R-2 = 0.74, 0.73 (WSI)] and solubility (R-2 = 0.64), but not to log P. When grouped by structural similarities, i.e., base resins with bisphenol A core (Group B), Group O containing diluent monomers, or Group U containing urethane dimethacrylate, WS within each group was inversely correlated to log P with R-2 = 0.98, 0.81, 0.95, and WS/solubility correlation improved with R-2 = 0.88, 0.92 and 0.75, respectively. Solubility ranging from 0.3% to 2.3% was inversely related to DC (r = -0.872). Conversion ranging from 41% to 81% was lower for resins with high base monomer concentrations and highest in mixtures with UDMA.Significance. Log P was a good predictor of WS after grouping the resins according to functional, compositional and structural similarities. WS and conversion were reasonably well predicted from Hoy's solubility parameters and other physical resin properties. (C) 2010 Academy of Dental Materials. Published by Elsevier Ltd. All rights reserved.