TY - GEN
T1 - Study of biobased shape memory polylactic acid/thermoplastic polyurethane (PLA/TPU) blends
AU - Jing, Xin
AU - Mi, Hao Yang
AU - Turng, Lih Sheng
AU - Peng, Xiang Fang
PY - 2013
Y1 - 2013
N2 - This paper presents the development of shape-memory polymers (SMPs) based on polylactic acid (PLA) and thermoplastic polyurethane (TPU) blends. PLA was melt blended with TPU at weight ratios of 20, 30, and 40%, and then injection molded and hot compressed into permanent shapes. Unlike most of the existing SMPs, all three PLA/TPU blends could be formed (via bending, folding, compression, stretching, etc.) into temporary shapes at room temperature without an extra heating step. Upon heating to above the glass transition temperature of PLA (at 70 °C), the deformed parts regained their original shapes quickly. Differential scanning calorimetry (DSC) and scanning electron microscopy (SEM) tests showed that PLA and TPU were immiscible. The dynamic mechanical analyzer (DMA) data and the mechanical tests, including tensile, compression, and flexural tests, showed that the PLA/TPU with the 80/20 weight ratio had the best shape-memory properties, even if it was somewhat brittle. The 70/30 PLA/TPU blend had the best combination of shape recovery and mechanical properties.
AB - This paper presents the development of shape-memory polymers (SMPs) based on polylactic acid (PLA) and thermoplastic polyurethane (TPU) blends. PLA was melt blended with TPU at weight ratios of 20, 30, and 40%, and then injection molded and hot compressed into permanent shapes. Unlike most of the existing SMPs, all three PLA/TPU blends could be formed (via bending, folding, compression, stretching, etc.) into temporary shapes at room temperature without an extra heating step. Upon heating to above the glass transition temperature of PLA (at 70 °C), the deformed parts regained their original shapes quickly. Differential scanning calorimetry (DSC) and scanning electron microscopy (SEM) tests showed that PLA and TPU were immiscible. The dynamic mechanical analyzer (DMA) data and the mechanical tests, including tensile, compression, and flexural tests, showed that the PLA/TPU with the 80/20 weight ratio had the best shape-memory properties, even if it was somewhat brittle. The 70/30 PLA/TPU blend had the best combination of shape recovery and mechanical properties.
KW - Polylactic acid (PLA)
KW - Shape-memory polymer blends
KW - Thermoplastic polyurethane (TPU)
UR - http://www.scopus.com/inward/record.url?scp=84890277242&partnerID=8YFLogxK
U2 - 10.1115/MSEC2013-1237
DO - 10.1115/MSEC2013-1237
M3 - 会议稿件
AN - SCOPUS:84890277242
SN - 9780791855454
T3 - ASME 2013 International Manufacturing Science and Engineering Conference Collocated with the 41st North American Manufacturing Research Conference, MSEC 2013
BT - ASME 2013 International Manufacturing Science and Engineering Conference Collocated with the 41st North American Manufacturing Research Conference, MSEC 2013
T2 - ASME 2013 International Manufacturing Science and Engineering Conference Collocated with the 41st North American Manufacturing Research Conference, MSEC 2013
Y2 - 10 June 2013 through 14 June 2013
ER -