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Keywords = wood flour/thermoplastic polyurethane blend

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14 pages, 3710 KiB  
Article
Mechanical, Thermal, and Shape Memory Properties of Three-Dimensional Printing Biomass Composites
by Hongjie Bi, Min Xu, Gaoyuan Ye, Rui Guo, Liping Cai and Zechun Ren
Polymers 2018, 10(11), 1234; https://doi.org/10.3390/polym10111234 - 7 Nov 2018
Cited by 32 | Viewed by 6414
Abstract
In this study, a series of heat-induced shape memory composites was prepared by the hot-melt extrusion and three-dimensional (3D) printing of thermoplastic polyurethane (TPU) using wood flour (WF) with different contents of EPDM-g-MAH. The mechanical properties, microtopography, thermal property analysis, and [...] Read more.
In this study, a series of heat-induced shape memory composites was prepared by the hot-melt extrusion and three-dimensional (3D) printing of thermoplastic polyurethane (TPU) using wood flour (WF) with different contents of EPDM-g-MAH. The mechanical properties, microtopography, thermal property analysis, and heat-induced shape memory properties of the composites were examined. The results showed that, when the EPDM-g-MAH content was 4%, the tensile elongation and tensile strength of the composites reached the maximum value. The scanning electron microscopy and dynamic mechanical analysis results revealed a good interface bonding between TPU and WF when the EPDM-g-MAH content was 4%. The thermogravimetric analysis indicated that the thermal stability of TPU/WF composites was enhanced by the addition of 4% EPDM-g-MAH. Heat-induced shape memory test results showed that the shape memory performance of composites with 4% EPDM-g-MAH was better than that of unmodified-composites. The composites’ shape recovery performance at a temperature of 60 °C was higher than that of the composites at ambient temperature. It was also found that, when the filling angle of the specimen was 45°, the recovery angle of the composites was larger. Full article
(This article belongs to the Special Issue Additive Manufacturing of Polymeric Materials)
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