Shape memory properties of polyurethane/poly(oxyethylene) blends

Kurahashi, Eiji; Sugimoto, Hideki; Nakanishi, Eiji; Nagata, Kenji; Inomata, Katsuhiro

doi:10.1039/c1sm06585h

Cited by 66 publications

(57 citation statements)

References 20 publications

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“…Polymer blending provides a powerful and convenient way to tune the physical properties and shape memory effects of materials . For instance, C. Tiller et al obtained a tunable multiple‐shape memory polymer with high strain storage capacity utilizing a lightly crosslinked polyethylene blend comprising 80 wt% EOC, 15 wt% LDPE, and 5 wt% HDPE .…”

Section: Introductionmentioning

confidence: 99%

“…For instance, C. Tiller et al obtained a tunable multiple‐shape memory polymer with high strain storage capacity utilizing a lightly crosslinked polyethylene blend comprising 80 wt% EOC, 15 wt% LDPE, and 5 wt% HDPE . Kurahashi reported shape memory behavior of polymer blends consisting of thermoplastic polyurethane (PU) and crystalline poly(oxyethylene) (POE) . A detailed shape memory mechanism for a SMP system which blended styrene‐butadiene‐styrene tri‐block copolymer (SBS) and poly( ε ‐caprolactone) (PCL) with both good recovery and fixing performances has also been suggested .…”

Section: Introductionmentioning

confidence: 99%

“…Polymer blending provides a powerful and convenient way to tune the physical properties and shape memory effects of materials. [24][25][26][27] For instance, C. Tiller et al obtained a tunable multiple-shape memory polymer with high strain storage capacity utilizing a lightly crosslinked polyethylene blend comprising 80 wt% EOC, 15 wt% LDPE, and 5 wt% HDPE. [ 24 ] Kurahashi reported shape memory behavior of polymer blends consisting of thermoplastic polyurethane (PU) and crystalline poly(oxyethylene) (POE).…”

Section: Introductionmentioning

confidence: 99%

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Tunable Triple‐Shape Memory Binary Mixtures with High Transition Temperature and Robust Mechanical Properties

Yang

Wang

2016

Macro Chemistry & Physics

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High temperature triggered shape memory polymers are currently attracting considerable attention due to their potential applications in the context of harsh environments. Herein, tunable dual-and triple-shape memory binary mixture polyimides with high transition temperatures that may meet some of these requirements are presented. The binary mixtures are prepared by blending two poly (amic acid)s of rodlike poly(benzoxazole-imide) (PIB) and fl exible polyetherimide (PIO), followed by solvent evaporation and thermal imidization. The aggregation structures, thermal mechanical properties, and shape memory behaviors are systematically studied. It is found that dual-shape memory cycles give excellent shape fi xity and recovery of up to 98 and 97%. Moreover, binary mixtures with broad glass transition temperatures endow good triple-shape memory effects and the shape memory at each step crucially depends on the content of the PIB due to the enhancement of physical crosslinks. Additionally, their thermally tough and mechanically strong properties would suggest wide potential applications of the mixtures.

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Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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Tunable Triple‐Shape Memory Binary Mixtures with High Transition Temperature and Robust Mechanical Properties

Yang

Wang

2016

Macro Chemistry & Physics

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“…[31][32][33][34][35][36] Blends of poly(3-caprolactone) (PCL) and styrene-butadiene-styrene triblock copolymer (SBS) were reported by Zhang et al, 31 and a general shape memory mechanism for polymer blends with two immiscible components was proposed. As a simple and controllable way to design new desirable materials, blending has been applied to prepare the shape memory polymer blends, and the morphology-property relationship of which have been extensively studied.…”

Section: Introductionmentioning

confidence: 99%

Superior shape memory properties and microstructure evolution of poly(ether-b-amide12) elastomer enhanced by poly(ε-caprolactone)

et al. 2015

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In this work, the superior shape memory properties and microstructure evolution of poly (ether-b-amide12) (PEBA) enhanced by poly(3-caprolactone) (PCL) were investigated. The PEBA/PCL blends were prepared by the methods of solution mixing and compression molding. The representative phase-separated morphologies were observed by optical microscopy (OM). The recovery stress and shape memory properties of the samples were determined by dynamic mechanical analysis (DMA). It was found that high loadings of PCL (up to 35 wt%) only marginally worsened the recovery properties of the blends.However, the values of maximum recovery stresses increased greatly with PCL content in spite of deformation temperature, indicating an enhancement effect of PCL on the recovery stress of polymer blends. Moreover, in situ wide angle X-ray scattering (WAXS) investigation revealed the microstructure evolution during the shape memory process. It was notable that during the stretching process, the strain-induced crystallization of soft segments (PTMO) of PEBA shifted to lower strain due to the existence of the PCL phase. The present results provided a reference that the recovery stress could be greatly increased by adding another polymer to the shape memory polymer, which is vital to application in the biomedical field. Fig. 9 The samples 100/0, 80/20 and 65/35 were (a) stretched to 3 ¼ 100% strain at 0 C and (b) cooled from 0 C to À20 C under constant 100% strain and (c) finally heated to 40 C under constant 100% strain; (a1, b1, c1) 4 020 indicate the relative content of (020) plane reflection of PTMO and the 4 020 have been normalized. (a2, b2, c2) PWHH 020 indicate the evaluation of peak width at half height (PWHH) of the corresponding azimuthal scanning profiles for (020) plane reflection of PTMO.This journal is

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“…The shape memory performance improves with the introduction of nanofillers, such as multiwall carbon nanotubes and nanofibers [27][28][29][30][31][32][33], functionalized graphene, and nanoclay [34,35], silicon carbide [36] and with organic components, such as poly(oxyethylene) [37], poly(vinyl chloride) [38], and soy protein [39]. These additives contribute to improvements in shape-memory properties via physical interactions with PU chains.…”

Section: Open Accessmentioning

confidence: 99%

Effects of Polybenzoxazine on Shape Memory Properties of Polyurethanes with Amorphous and Crystalline Soft Segments

Jana

2014

Polymers

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This paper evaluates the role of minor component polybenzoxazine (PB) on shape-memory properties of polyurethanes (PU) with glassy and crystalline soft segments. The polymer compounds were prepared in two steps. In the first step, benzoxazine, polyurethane pre-polymer, and chain extender butanediol (BD) were mixed into a solution followed by chain-extension of the pre-polymer with BD. In the second step, benzoxazine was polymerized at 180 °C for 3 h to obtain shape memory polymer compounds. The atomic force microscopy images revealed that the PB-phase formed uniform dispersions in PU. The presence of PB-phase induced shape-memory behavior in non-shape memory PU with amorphous soft segment and significantly improved the values of shape fixity, recovery ratio, and recovery stress in shape memory polyurethane with crystalline soft segment.

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Shape memory properties of polyurethane/poly(oxyethylene) blends

Cited by 66 publications

References 20 publications

Tunable Triple‐Shape Memory Binary Mixtures with High Transition Temperature and Robust Mechanical Properties

Tunable Triple‐Shape Memory Binary Mixtures with High Transition Temperature and Robust Mechanical Properties

Superior shape memory properties and microstructure evolution of poly(ether-b-amide12) elastomer enhanced by poly(ε-caprolactone)

Effects of Polybenzoxazine on Shape Memory Properties of Polyurethanes with Amorphous and Crystalline Soft Segments

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