Effect of thermoplastic polyurethane (TPU) on the thermal and mechanical properties of polylactic acid (PLA)/curcumin blends

International Conference on Advances in Manufacturing and Materials Engineering 2017

机械制造;材料科学

Sharifah, I.S.S.^1 ; Adnan, M.D.A.^1 ; Nor Khairusshima, M.K.^1 ; Shaffiar, N.M.^1 ; Buys, Y.F.^1

Department of Manufacturing and Materials Engineering, International Islamic University Malaysia (IIUM), Jalan Gombak, Kuala Lumpur

53100, Malaysia^1

关键词: Elongation at break;    Poly lactic acid;    Single fiber;    Thermal and mechanical properties;    Thermoplastic polyurethanes;   

Others  :  https://iopscience.iop.org/article/10.1088/1757-899X/290/1/012081/pdf
DOI  :  10.1088/1757-899X/290/1/012081

学科分类：材料科学（综合）

来源: IOP

【 摘 要 】

Polylactic acid (PLA) is known to be brittle by nature and thus limits the flexibility of the polymer. A possible solution to enhance the flexibility of PLA is to add a flexible polymeric based material such as thermoplastic polyurethane (TPU). In this study, 30-50 wt% of TPU was added into PLA/curcumin blends to improve its flexibility. Thermal analysis using differential scanning calorimetry shows that further additions of TPU at the expense of PLA did not affect the glass transition temperature, crystallisation temperature and melting temperature of the blends. Fibers of PLA/curcumin/TPU were successfully drawn and Single Fiber Tensile Test (SFTT) showed vast improvement in elongation at break. The initial addition of 30 wt% of TPU to the brittle PLA/curcumin composition causes a significant increase in elongation at break by 39 times and further additions at 50 wt %, the elongation at break increases by 105 times. However, with the increase in elongation, a decrease in strength and Young's modulus was observed.