Effect of Polypropylene Fiber Addition on the Flexural Strength, Fracture Toughness, and Hardness of Heat-Polymerized Acrylic Resin
Effect of Polypropylene Fiber Addition on the Flexural Strength, Fracture Toughness, and Hardness of Heat-Polymerized Acrylic Resin
复制标题
聚丙烯纤维的添加对热聚合丙烯酸树脂弯曲强度、断裂韧性和硬度的影响
DOI：
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发表时间：
2017
期刊：
影响因子：
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通讯作者：
Mohamed I. Ebrahim
中科院分区：
文献类型：
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作者：
Mohammed Fahmi;Mohamed I. Ebrahim
目的：聚甲基丙烯酸甲酯（PMMA）的机械强度差，对义齿的长期使用效果不理想。本研究的目的是评价聚丙烯纤维粉末的浓度为丙烯酸树脂聚合物粉末的10重量%时对热聚合丙烯酸树脂的弯曲强度、断裂韧性和硬度的影响。材料与方法：将浓度为丙烯酸树脂聚合物粉末的2重量%的聚丙烯纤维粉末掺入热固化丙烯酸树脂（PMMA）中并按比例加工（2.5：1的粉末/单体比，然后填充，最后在95 ℃水浴固化2小时），以制造尺寸为（65 mm长× 10 mm宽× 2.5 mm厚）的PMMA测试样品，用于测量弯曲强度、断裂韧性，和（30 mm长× 10 mm宽× 2.5 mm厚）用于测量表面硬度，根据国际标准化组织（ISO）规范No.1567制备。制备不含添加剂的PMMA作为测试对照。这种类型的机械测试;弯曲强度，断裂韧性和硬度进行的样品。收集弯曲强度（MPa）、断裂韧性（MPa.m1/2）和硬度（VHN）的记录值，制表并进行统计分析。采用单因素方差分析（ANOVA）和Tukey检验检验受试组平均值之间的显著性，当P值≤ 0.05时具有统计学显著性。结果：聚乙烯纤维的加入显著提高了PMMA的弯曲强度、断裂韧性和硬度。结论：这些结果表明，聚乙烯纤维添加到PMMA中具有作为可靠的义齿基托材料的潜力，其具有增加的弯曲强度、断裂韧性和硬度。根据本研究的结果，当聚丙烯纤维粉末以按重量计2%的浓度添加到丙烯酸树脂聚合物中时，获得最佳的机械性能。
Purpose: Polymethyl methacrylate (PMMA) suffers from poor mechanical strength and far from ideal for maintaining the longevity of denture. The purpose of this study was to evaluate the effect of polypropylene fiber powder with concentration 10% by weight of the acrylic resin polymer powder on the flexural strength, fracture toughness, and hardness of heat-polymerized acrylic resin. Materials and Methods: Polypropylene fiber powder with concentration 2% by weight of the acrylic resin polymer powder were incorporated into heat-cure acrylic resin (PMMA) and processed by proportion (2.5:1 Powder/monomer ratio then packing and finally water bath curing for 2 hours at 95 ̊C) to fabricate test specimens of PMMA of dimensions (65 mm length x 10 mm width x 2.5 mm thickness) were used for measuring flexural strength, fracture toughness, and (30 mm length x 10 mm width x 2.5 mm thickness) for measuring surface hardness were prepared according to International Standards Organization (ISO) Specification No.1567. PMMA without additives was prepared as a test control. This types of mechanical tests; flexural strength, fracture toughness and hardness were carried out on the samples. The recorded values of flexural strength in (MPa), fracture toughness in (MPa.m1/2), and hardness (VHN) were collected, tabulated and statistically analyzed. One way analysis of variance (ANOVA) and Tukey’s tests were used for testing the significance between the means of tested groups which are statistically significant when the P value ≤ 0.05. Results: Addition of polyethylene fiber to PMMA significantly increased the flexural strength, fracture toughness and hardness. Conclusion: These results indicate that polyethylene fiber added to PMMA has a potential as a reliable denture base material with increased flexural strength, fracture toughness, and hardness. According to the results of the present study, the best mechanical properties were achieved by adding polypropylene fiber powder with concentration 2 % by weight on acrylic resin polymer.
影响因子：
5
作者：
GOLDBERG, AJ;BURSTONE, CJ
通讯作者：
BURSTONE, CJ