scholarly journals Molecular weight influence on shape memory effect of shape memory polymer blend (poly(caprolactone)/ styrene‐butadiene‐styrene )

2020 ◽  
Vol 138 (5) ◽  
pp. 49761 ◽  
Author(s):  
Abir Ben Abdallah ◽  
Fehmi Gamaoun ◽  
Achraf Kallel ◽  
Abbas Tcharkhtchi
Keyword(s):  
Molecular Weight ◽  
Shape Memory ◽  
Shape Memory Effect ◽  
Memory Effect ◽  
Polymer Blend ◽  
Shape Memory Polymer ◽  
Styrene Butadiene Styrene ◽  
Styrene Butadiene ◽  
Poly Caprolactone ◽  
Butadiene Styrene

Thermo‐responsive shape memory properties based on polylactic acid and styrene‐butadiene‐styrene block copolymer

2021 ◽  
pp. 51000
Author(s):  
Fathin Hani Azizul Rahim ◽  
Abdul Aziz Saleh ◽  
Raa Khimi Shuib ◽  
Ku Marsilla Ku Ishak ◽  
Zuratul Ain Abdul Hamid ◽  
...  
Keyword(s):  
Block Copolymer ◽  
Shape Memory ◽  
Polylactic Acid ◽  
Shape Memory Properties ◽  
Styrene Butadiene Styrene ◽  
Styrene Butadiene ◽  
Butadiene Styrene

Viscoelastic Behavior of Styrene-Butadiene-Styrene Block Copolymers in Temperature Range of Glass-Rubber Transition of Styrene Block

1996 ◽  
Vol 69 (1) ◽  
pp. 73-80 ◽  
Author(s):  
N. Nakajima
Keyword(s):  
Molecular Weight ◽  
Block Copolymers ◽  
Viscoelastic Behavior ◽  
Shear Mode ◽  
Molecular Weight Polymer ◽  
Styrene Butadiene Styrene ◽  
The Difference ◽  
Tan Δ ◽  
Styrene Butadiene ◽  
Butadiene Styrene

Abstract Dynamic mechanical measurements were performed with styrene-butadiene-styrene (SBS) block copolymers, Kraton D-1101 and D-l 102. Isochronal data were obtained from −130 to 85°C in the tensile mode at 1 Hz and from 60 to 160°C in the shear mode at 1 rad/s. The isothermal measurements were also performed at 60, 90, 120, 140, and 160°C in the frequency range of 0.0316 to 100 rad/s. The results suggest that the two polymers have different morphologies although the styrene content and the diblock content are about the same for both polymers. Kraton D-1101, which has 1.5 times higher molecular weight, has 3–5 times higher rubbery modulus, compared to D-1102. The lower molecular weight polymer, D-1102, appears to have a larger amount of the mixed phase at the boundary. This is suggest by the lower temperature of the “domain disruption”, Tdd and the higher magnitude of tan δ at Tdd. This explains the difference in the rubbery moduli of the two polymers.

Engineering oriented hierarchical lamellar structures in SBS/PS blends via a pressure-induced flow field

RSC Advances ◽  
2016 ◽  
Vol 6 (26) ◽  
pp. 21546-21554 ◽  
Author(s):  
Sen Zhang ◽  
Xiaoling Feng ◽  
Shu Zhu ◽  
Shiwei Wang ◽  
Da Wang ◽  
...  
Keyword(s):  
Flow Field ◽  
Polymer Blend ◽  
Layered Structure ◽  
Lamellar Structure ◽  
Lamellar Structures ◽  
Induced Flow ◽  
Styrene Butadiene Styrene ◽  
Styrene Butadiene ◽  
Butadiene Styrene

A hierarchical layered structure was generated using a polymer blend of polystyrene/poly(styrene–butadiene–styrene). Benefiting from the hierarchical lamellar structure, the resulting strength, stiffness and toughness were simultaneously enhanced.

scholarly journals Fabrication and Two-Way Deformation of Shape Memory Composite with SMA and SMP

2010 ◽  
Vol 638-642 ◽  
pp. 2189-2194 ◽  
Author(s):  
Hisaaki Tobushi ◽  
Shunichi Hayashi ◽  
Y. Sugimoto ◽  
K. Date
Keyword(s):  
Shape Memory Alloy ◽  
Shape Memory ◽  
Shape Memory Effect ◽  
Memory Effect ◽  
Shape Memory Polymer ◽  
Bending Deformation ◽  
Heating And Cooling ◽  
Round Shape ◽  
Heat Treated ◽  
Shape Memory Composite

The shape memory composite (SMC) with shape memory alloy (SMA) and shape memory polymer (SMP) was fabricated, and the two-way bending deformation and recovery force were investigated. The results obtained can be summarized as follows. (1) Two kinds of SMA tapes which show the shape memory effect and superelasticity were heat-treated to memorize the round shape, respectively. The shape-memorized round SMA tapes were sandwiched between the SMP sheets, and the SMC belt was fabricated. (2) The two-way bending deformation with an angle of 56 degrees is observed during heating and cooling. (3) If the SMC belt is heated and cooled by keeping the form, recovery force increases during heating and decreases during cooling.

The relevance of molecular weight in the design of amorphous biodegradable polymers with optimized shape memory effect

2016 ◽  
Vol 61 ◽  
pp. 541-553 ◽  
Author(s):  
S. Petisco-Ferrero ◽  
J. Fernández ◽  
M.M. Fernández San Martín ◽  
P.A. Santamaría Ibarburu ◽  
J.R. Sarasua Oiz
Keyword(s):  
Molecular Weight ◽  
Shape Memory ◽  
Shape Memory Effect ◽  
Memory Effect ◽  
Biodegradable Polymers

SELF-SURFACE WRINKLING ATOP ACRYLONITRILE BUTADIENE STYRENE (ABS) VIA HEATING-RESPONSIVE SHAPE MEMORY EFFECT

2019 ◽  
Vol 26 (08) ◽  
pp. 1950044 ◽  
Author(s):  
LI SUN ◽  
TAO XI WANG ◽  
MUHAMMAD HAIRUL IZWAN BIN MOHD ZAKEE ◽  
MUHAMMAD SYAZWAN BIN ROSLI ◽  
YUN XIANG LEE ◽  
...  
Keyword(s):  
Surface Treatment ◽  
Shape Memory ◽  
Shape Memory Effect ◽  
Memory Effect ◽  
Water Solution ◽  
Acrylonitrile Butadiene Styrene ◽  
Influential Factors ◽  
Acetone Concentration ◽  
Dipping Time ◽  
Butadiene Styrene

In this paper, first we investigate the heating-responsive shape memory effect in an acrylonitrile butadiene styrene (ABS). Subsequently, after surface treatment (via dipping in acetone/water solution of different concentrations and for different dipping time) of pre-stretched samples, we demonstrate the feasibility to form strip shaped wrinkles atop the surface upon heating of pre-stretched ABS for shape recovery. The influential factors, such as acetone concentration and dipping time in surface treatment, are revealed and discussed.

Synthesis and Characterization of IPDI Based Shape Memory Polyurethane

2020 ◽  
Vol 1010 ◽  
pp. 142-147
Author(s):  
Nur Athirah Rasli @ Rosli ◽  
Syazana Ahmad Zubir
Keyword(s):  
Shape Memory ◽  
Shape Memory Effect ◽  
Memory Effect ◽  
Soft Segment ◽  
Shape Memory Polymer ◽  
Palm Kernel ◽  
Hexamethylene Diisocyanate ◽  
Molar Ratio ◽  
Scanning Calorimetry ◽  
Chain Flexibility

Various polyurethane-based shape memory polymer was synthesized using polycaprolactone (PCL) as soft segment and, hexamethylene diisocyanate (HMDI) and isophorone diisocyanate (IPDI) as the hard segments. Palm kernel oil-based polyol was used to replace part of the petroleum-based polyol due to the increasing demand on renewable resources as a result of environmental awareness. The synthesis has been carried out using two step polymerization method. The effects of varying the molar ratio of IPDI/HMDI on material properties such as crystallinity, transition temperature, morphology, shape memory effect and tensile strength were investigated by using Fourier transform infrared spectroscopy (FTIR), differential scanning calorimetry (DSC), X-ray diffraction (XRD), scanning electron microscopy (SEM), shape memory test and tensile test. A high IPDI content in SMPU results in better shape memory effect, whereas increasing HMDI content leads to a better chain flexibility. In this work, the incorporation of IPDI contributes to the formation of phase separation which enhance the formation of crystalline soft segment structure while the incorporation of HMDI as isocyanate tend to promote phase mixing which enhance the chain flexibility of the SMPU backbone.

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