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首页> 外文期刊>Journal of Applied Polymer Science >Fabrication of water-soluble poly(vinylalcohol)-based composites with improved thermal behavior for potential three-dimensional printing application
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Fabrication of water-soluble poly(vinylalcohol)-based composites with improved thermal behavior for potential three-dimensional printing application

机译：基于水溶性聚（乙烯醇）基复合材料的制备，具有改进的潜在三维印刷应用的热行为

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摘要

Water-soluble support materials are essential for fabrication of three-dimensional printing component, in particular of fused deposition modeling (FDM) process. Poly(vinyl alcohol) (PVA) was considered as a potential ideal candidate used in rapid prototyping technology, while its properties and process-ability need to be improved for the wide application. This article attempts to use urea/caprolatam (UC) as modification additive for tuning the thermal and mechanical properties of PVA. PVA-based films with different content of additives were prepared by solution casting method. The results showed that with the increase of UC, PVA films showed decreased crystallinity and melting temperature, while the initial degradation temperature and melt index were increased. The corporation of UC decreased the melting temperature to 173.04 degrees C and PVA composite with 4.5% crystallinity was fabricated. Due to the formation of hydrogen bonding between UC and the hydroxyl group of PVA, the tensile strength and modulus of PVA were slightly decreased, while strain-at-break was significantly enhanced, as high as 470.24%, indicating UC behaved as good plasticizing effect. The microstructure examination via scanning electron microscopy showed that when the content of UC was less than 30% in the composites, homogeneous phase could be observed, indicating good compatibility between these two components. (C) 2017 Wiley Periodicals, Inc.
机译：水溶性支撑材料对于制造三维印刷组分，特别是融合沉积建模（FDM）工艺必需。聚（乙烯醇）（PVA）被认为是在快速原型技术中使用的潜在理想候选者，而其性能和工艺能力需要改善广泛的应用。本文试图使用尿素/己内蛋白（UC）作为改性添加剂，用于调整PVA的热和机械性能。通过溶液浇铸方法制备具有不同添加剂含量的PVA的薄膜。结果表明，随着UC的增加，PVA薄膜显示结晶度和熔化温度降低，而初始降解温度和熔体指数增加。 UC的公司将熔融温度降至173.04℃，并制备具有4.5％结晶度的PVA复合材料。由于UC和PVA的羟基之间的氢键形成，PVA的拉伸强度和模量略微降低，而菌株发生显着增强，高达470.24％，表明UC表现为良好的增塑作用。通过扫描电子显微镜的微观结构检测显示，当UC的含量小于30％的复合材料时，可以观察到均匀相，表明这两个组分之间的良好相容性。 （c）2017 Wiley期刊，Inc。

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