Development of Thermal Resistant FDM Printed Blends. The Preparation of GPET/PC Blends and Evaluation of Material Performance
Development of Thermal Resistant FDM Printed Blends. The Preparation of GPET/PC Blends and Evaluation of Material Performance
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DOI：
10.3390/ma13092057
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发表时间：
2020-05-01
期刊：
影响因子：
3.4
通讯作者：
Marciniak-Podsadna, Lidia
中科院分区：
文献类型：
--
作者：
Andrzejewski, Jacek;Marciniak-Podsadna, Lidia
本文讨论了以聚对苯二甲酸乙二醇酯共聚物/聚碳酸酯（GPET/PC）为基础的共混聚合物的制备。为了评估材料在熔融沉积建模（FDM） 3D打印过程中的适用性，已经准备了材料。测试的关键特征是热机械阻力，通过头部挠曲温度（HDT）和维卡软化温度（VST）测量，并进行力学测试和动态力学热分析（DMTA）。观察到PC含量的增加与共混物性能之间有明显的关系。DMTA分析显示，玻璃化转变温度发生了显著变化，表明该聚合物体系具有混相性。力学试验表明，随着PC相在结构中所占比例的增加，结构的刚度和强度有明显的提高趋势。冲击强度的增加也很明显，然而，与纯PC的结果相比，GPET/PC共混物的结果明显较低。作为研究的一部分，还制备了基于聚对苯二甲酸乙二醇酯均聚物（PET）的参考样品和添加10%滑石粉的复合样品。PET/PC（50/50）样品的结构分析没有显示混相。然而，由于PET结晶相的形成，这些材料的热机械电阻明显更高。扫描电镜（SEM）分析证实了GPET/PC共混结构的高度相容性，因为没有明显的相分离迹象。在PET/PC共混物中没有观察到这种现象，这证实了两种测试聚合物体系的不同的热机械相互作用。
The paper discusses the preparation of polymer blends based on the polyethylene terephthalate copolymer/polycarbonate (GPET/PC). Materials have been prepared in order to assess their applicability in the fused deposition modeling (FDM) 3D printing process. The tested key feature was the thermomechanical resistance, measured by head deflection temperature (HDT) and Vicat softening temperature (VST), the mechanical tests and dynamic mechanical thermal analysis (DMTA) were also performed. A clear relationship between the increasing content of PC in the blend properties was observed. DMTA analysis revealed significant changes in the glass transition temperature, which indicates the miscibility of this type of polymer system. The mechanical tests indicate a clear trend of stiffness and strength improvement along with the increasing share of PC phase in the structure. The increase in impact strength is also clear, however, compared to the results for a pure PC, the results obtained for GPET/PC blends are significantly lower. As part of the research, reference samples based on polyethylene terephthalate homopolymer (PET) and composite samples with addition of 10% talc were also prepared. The structure analysis for PET/PC(50/50) samples did not show miscibility. However, due to the formation of the PET crystalline phase, the thermomechanical resistance of these materials was visibly higher. Scanning electron microscopy (SEM) analysis confirmed a high degree of compatibility of the GPET/PC blend structure as indicated by the lack of visible signs of phase separation. This phenomenon is not observed for PET/PC blends, which confirms the different thermomechanical interactions of both tested polymer systems.