Mechanical Properties of Orthodontic Thermoplastics PETG/PC2858 after Blending
Mechanical Properties of Orthodontic Thermoplastics PETG/PC2858 after Blending
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DOI：
10.3290/j.cjdr.a35696
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发表时间：
2016-01-01
影响因子：
0.9
通讯作者：
Bai, Yu Xing
中科院分区：
文献类型：
--
作者：
Ma, Yan Song;Fang, Dong Yu;Bai, Yu Xing
目的：为了考察和比较多比例共混后的拉伸特性，确定新型热塑性材料的合适共混比例，并与市售热塑性塑料进行力学性能比较。对每个比例的标准样品进行模塑和测试，以确定其机械性能。结果：随着PC 2858含量的增加，复合材料的拉伸强度和冲击强度增加，断裂伸长率降低。当共混比（wt %）为70/30时，PETG/PC 2858具有最佳的力学性能，拉伸强度为63.42 ± 1.67 MPa，应力松弛速率为0.0080 ± 0.0005 N/s，超过Erkodur和Biolon。通过将PETG和PC 2858以70/30的重量比共混，我们获得了优于商业产品的新的热塑性材料。
Objective: To characterise and compare the tensile characteristics after multi-proportional blending, to determine the proper blending ratio for new thermoplastic material and to compare its mechanical performance with commercial thermoplastics.Methods: PETG and PC2858 aggregates were blended in five different ratios. Standard specimens of each ratio were molded and tested to determine their mechanical performance. Then the new material with the proper blending ratio was chosen and compared against commercial thermoplastics.Results: With the increase of PC2858 content, the tensile and impact strength increased but elongation at break decreased. When blending ratio (wt %) was 70/30, the PETG/PC2858 exhibited optimal mechanical properties, with a tensile strength of 63.42 +/- 1.67 MPa, and a stress relaxation rate of 0.0080 +/- 0.0005 N/s, which exceeded those of Erkodur and Biolon.Conclusion: By blending PETG and PC2858 at the weight ratio 70/30, we obtained new thermoplastic material which outperformed commercial products.