SCREENING OF MATRICES AND FIBERS FOR REINFORCED THERMOPLASTICS INTENDED FOR DENTAL APPLICATIONS
SCREENING OF MATRICES AND FIBERS FOR REINFORCED THERMOPLASTICS INTENDED FOR DENTAL APPLICATIONS
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DOI：
10.1002/jbm.820280205
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发表时间：
1994-02-01
期刊：
影响因子：
--
通讯作者：
JANCAR, J
中科院分区：
文献类型：
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作者：
GOLDBERG, AJ;BURSTONE, CJ;JANCAR, J
连续纤维增强塑料（FRC）正在开发用于牙科应用，例如修复框架和正畸固位器。对六种热塑性基体、三种纤维和三种纤维体积分数的FRC的弯曲性能、应力松弛和水解稳定性进行了评价。对具有临床相关尺寸的样本进行了试验。聚碳酸酯是优选的基质材料。用42体积%玻璃纤维增强的聚碳酸酯表现出最高的弯曲模量（17.9 +/- 2.6 GPa）、弯曲强度（426 +/- 40 MPa）、增强效率（0.79）和抗应力松弛性的组合。Kevlar增强材料表现出较低的弯曲模量和强度。在临床感兴趣的范围内，所有复合材料的表观弯曲模量随跨度长度而降低。一般而言，所有FRC研究的普遍失效模式是在弯曲载荷下的脆性失效。相对较大的样品到样品的组成和性能的变化表明，改进的制造方法将需要在未来的studies.The组合良好的弯曲性能，成形性和透明性表明，新的器具设计牙科FRC是可行的，但其性能，特别是纤维/基质界面质量的影响需要进一步研究。(C)1994年，John Wiley and Sons，Inc.
Plastics reinforced with continuous fibers (FRC) are being developed for dental applications, such as prosthodontic frameworks and orthodontic retainers. Flexure properties, stress relaxation and hydrolytic stability of FRC based on six thermoplastic matrices, three types of fibers, and three fiber volume fractions were evaluated. Samples with clinically relevant dimensions were tested. Polycarbonate was the preferred matrix material. Polycarbonate reinforced with 42 volume percent glass fibers exhibited the highest combination of flexure modulus (17.9 +/- 2.6 GPa), flexure strength (426 +/- 40 MPa), reinforcing efficiency (0.79), and resistance to stress relaxation.No statistically significant difference was observed between E and S2 glass reinforced composites under the experimental conditions used. Kevlar reinforced materials exhibited a low flexure modulus and strength. The apparent flexure moduli of all composites decreased with span length in the range of clinical interest. Generally, the prevalent mode of failure for all FRC investigated was brittle failure under flexure loading. Relatively large sample-to-sample variation in both composition and properties indicated that improved fabrication methods will be needed in future studies.The combination of good flexure properties, formability, and translucency suggests that novel appliance designs for dentistry are feasible with FRC, but further studies of its properties and particularly the effects of fiber/matrix interfacial quality are needed. (C) 1994 John Wiley and Sons, Inc.