Polystyrene/thermoplastic polyurethane interpenetrating network-based nanocomposite with high-speed, thermo-responsive shape memory behavior

Polymer ◽  
2020 ◽  
Vol 200 ◽  
pp. 122575 ◽  
Author(s):  
Tuhin Ghosh ◽  
Brigitte Voit ◽  
Niranjan Karak
Keyword(s):  
Shape Memory ◽  
High Speed ◽  
Thermoplastic Polyurethane ◽  
Interpenetrating Network ◽  
Shape Memory Behavior

scholarly journals Solvent-Free One-Shot Synthesis of Thermoplastic Polyurethane Based on Bio-Poly(1,3-propylene succinate) Glycol with Temperature-Sensitive Shape Memory Behavior

ACS Omega ◽  
2020 ◽  
Vol 5 (8) ◽  
pp. 4058-4066 ◽  
Author(s):  
Cattaleeya Pattamaprom ◽  
Chien-Hui Wu ◽  
Po-Han Chen ◽  
Yu-Lin Huang ◽  
Palraj Ranganathan ◽  
...  
Keyword(s):  
Shape Memory ◽  
Thermoplastic Polyurethane ◽  
Solvent Free ◽  
Temperature Sensitive ◽  
Shape Memory Behavior

Polyurethane/Clay Shape Memory Nanocomposites Based on Palm Oil Polyol

2012 ◽  
Vol 576 ◽  
pp. 236-239 ◽  
Author(s):  
Syazana Ahmad Zubir ◽  
Ernie Suzana Ali ◽  
Sahrim Haji Ahmad ◽  
Norazwani Muhammad Zain ◽  
Soo Kai Wai
Keyword(s):  
Shape Memory ◽  
Palm Oil ◽  
Soft Segment ◽  
Thermoplastic Polyurethane ◽  
Clay Content ◽  
Weight Percent ◽  
Shape Memory Behavior ◽  
Crosslinking Process ◽  
The Matrix ◽  
Polyurethane Nanocomposites

Thermoplastic polyurethane (TPU) nanocomposites were prepared using polycaprolactonediol as the soft segment, 4,4’-diphenylmethane diisocyanate as the hard segment, 1,4-butanediol and palm oil polyol. Nanoclay with certain weight percent (wt%) was reinforced as filler to improve both mechanical and shape memory behavior of the nanocomposites. Palm oil polyol was introduced in order to provide hyperbranched structure for better dispersion of filler in the matrix as well as aiding the crosslinking process. The experimental results showed that the mechanical and shape memory behavior of clay reinforced polyurethane nanocomposites were influenced by clay weight percent in the polymer matrix. TPU with 3 wt% clay showed optimum values of mechanical properties while the shape memory behavior decreases with increasing clay content.

Understanding the shape memory behavior of thermoplastic polyurethane elastomers with coarse-grained molecular dynamics simulations

MRS Advances ◽  
2017 ◽  
Vol 2 (6) ◽  
pp. 375-380 ◽  
Author(s):  
Md Salah Uddin ◽  
Jaehyung Ju
Keyword(s):  
Molecular Dynamics ◽  
Shape Memory ◽  
Shape Recovery ◽  
Thermoplastic Polyurethane ◽  
Coarse Grained ◽  
Polyurethane Elastomers ◽  
Weight Percentage ◽  
Shape Memory Behavior ◽  
Soft Segments ◽  
Hard Segments

ABSTRACTWe perform molecular dynamics (MD) simulations to understand thermally triggered shape memory behavior of a thermoplastic polyurethane (TPU) elastomer with an enhanced coarse-grained (CG) model. Hard and soft phases of shape memory polymers (SMPs) are known as fixed and reversible phase, respectively. Fixity depends on the content of hard segments due to their restricted mobility. On the contrary, recovery depends on the dynamic motion of the soft segments as well the degree of cross-linking, which is also affected by the quantity of hard segment. Several CG models of the TPU are constructed varying the weight percentage of soft segments to observe their effects on shape recovery and fixity. All of the models are equilibrated at 300K (above glass transition, Tg: 200-250 K) and deformed under uniaxial loading with NPT (isothermal-isobaric) ensembles. The deformed state is cooled to 100K (below Tg) and further equilibrated to estimate the shape fixity. Shape recovery is predicted by heating and equilibrating the structures back to 300K. By the end of this study, we may answer how much the shape fixities and recoveries are changed for varying concentration of hard segments from thermomechanical cycles with CGMD simulations.

The morphology, properties, and shape memory behavior of polylactic acid/thermoplastic polyurethane blends

2014 ◽  
Vol 55 (1) ◽  
pp. 70-80 ◽  
Author(s):  
Xin Jing ◽  
Hao-Yang Mi ◽  
Xiang-Fang Peng ◽  
Lih-Sheng Turng
Keyword(s):  
Shape Memory ◽  
Polylactic Acid ◽  
Thermoplastic Polyurethane ◽  
Shape Memory Behavior
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