Comparison of thermal, mechanical and thermomechanical properties of poly(lactic acid) injection-molded into epoxy-based Rapid Prototyped (PolyJet) and conventional steel mold

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• 作者：T. Tábi ; N. K. Kovács ; I. E. Sajó…
• 关键词：Injection molding ; Biodegradable polymer ; Nucleating agents ; Additive manufacturing ; Rapid prototyping
• 刊名：Journal of Thermal Analysis and Calorimetry
• 出版年：2016
• 出版时间：January 2016
• 年：2016
• 卷：123
• 期：1
• 页码：349-361
• 全文大小：2,199 KB
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• 作者单位：T. Tábi (1) (2)
  N. K. Kovács (2)
  I. E. Sajó (3)
  T. Czigány (1) (2)
  S. Hajba (2)
  J. G. Kovács (2)
  
  1. MTA–BME Research Group for Composite Science and Technology, Muegyetem rkp. 3, 1111, Budapest, Hungary
  2. Department of Polymer Engineering, Faculty of Mechanical Engineering, Budapest University of Technology and Economics, Muegyetem rkp. 3, 1111, Budapest, Hungary
  3. Szentágothai Research Centre, University of Pécs, Ifjúság útja 20, 7624, Pécs, Hungary
  
• 刊物类别：Chemistry and Materials Science
• 刊物主题：Chemistry
  Sciences
  Polymer Sciences
  Physical Chemistry
  Inorganic Chemistry
  Measurement Science and Instrumentation
  
• 出版者：Akad茅miai Kiad贸, co-published with Springer Science+Business Media B.V., Formerly Kluwer Academic
• ISSN：1572-8943

文摘

The number of renewable-resource-based and inherently biodegradable poly(lactic acid) (PLA) products is growing in the market, resulting in an increasing demand to produce even small series of injection-molded PLA prototypes for testing purposes by using rapid molds. In our research, it was first demonstrated that it is possible to use epoxy-based molds made by PolyJet Rapid Prototyping technology for conventional injection molding to produce small series of PLA parts. The effect of mold material, namely conventional steel mold and epoxy-based PolyJet mold, was analyzed on the thermal and mechanical properties of the injection-molded products. PLA was used with no, moderate and high nucleating agent contents [talc and poly(ethylene glycol)] to obtain a model material with slow, moderate and high crystallization rates, respectively. It was demonstrated that the mold used and thus the thermal conductivity of the mold had significant effect on the crystallinity of the PLA parts and thus on its mechanical and thermomechanical properties. Finally, it was found that it is possible to mimic the thermomechanical properties of nucleated PLA injected into hot mold used for mass production by injecting it into the epoxy-based PolyJet mold used for small series production.