Flexural properties of ethyl or methyl methacrylate-UDMA blend polymers
Flexural properties of ethyl or methyl methacrylate-UDMA blend polymers
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DOI：
10.4012/dmj.2010-045
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发表时间：
2010-09-01
影响因子：
2.5
通讯作者：
Ban, Seiji
中科院分区：
文献类型：
--
作者：
Kanie, Takahito;Kadokawa, Akihiko;Ban, Seiji
采用两种工艺制备了光固化聚甲基丙烯酸乙酯（PEMA）-聚氨酯二甲基丙烯酸酯（UDMA）树脂和聚甲基丙烯酸甲酯（PMMA）-UDMA树脂。第一步。将PEMA或PMMA粉末完全溶解在甲基丙烯酸乙酯(EMA)或甲基丙烯酸甲酯(MMA)中，然后将PEMA-EMA/PMMA-MMA混合物与UDMA混合。使用两种 PEMA（分子量：300,000-400,000 和 650,000-1,000,000）和三种 PMMA（分子量：30,000-60,000、350,000 和 650,000-1,000,000）粉末测量固化 PEMA-UDMA 和 PMMA-UDMA 聚合物的弯曲性能不同分子量的PMMA-MMA的四种混合比例，以及PMMA-MMA混合物和UDMA低聚物的三种混合比例。 PMMA(Mw:350,000)-MMA=25/50、PMMA(Mw:350,000)-MMA/UDMA=1/2和=1/1的聚合物在1mm/min的弯曲试验中未出现断裂，弯曲强度和弯曲模量与市售的热固化和自固化丙烯酸树脂相比没有显着差异(p>0.01)。在本研究的限制内，该组合物的甲基丙烯酸甲酯-UDMA共混聚合物可用于义齿基托树脂。
Light-curing polyethyl methacrylate (PEMA)-urethane dimethacrylate (UDMA) resins and polymethyl methacrylate (PMMA)-UDMA resins were prepared by two processes. For first step. PEMA or PMMA powders were fully dissolved in ethyl methacrylate (EMA) or methyl methacrylate (MMA) and then the PEMA-EMA/PMMA-MMA mixtures were mixed with UDMA. The flexural properties of cured PEMA-UDMA and PMMA-UDMA polymers were measured using two PEMA (Mw: 300,000-400,000 and 650,000-1,000,000) and three PMMA (Mw: 30,000-60,000, 350,000 and 650,000-1,000,000) powders with different molecular weight, four mixing ratios of PMMA-MMA, and three mixing ratios of PMMA-MMA mixture and UDMA oligomer. Polymers with PMMA(Mw: 350,000)-MMA=25/50, and with PMMA(Mw: 350,000)-MMA/UDMA=1/2 and =1/1, showed no-fracture in a flexural test at 1 mm/min and flexural strength and flexural modulus showed no significant difference compared with those of commercially available heat- and self-curing acrylic resins (p>0.01). Within limitation of this investigation, methyl methacrylate-UDMA blend polymer of this composition is available for denture base resin.