Evaluation of nanoparticulate fillers for development of shape memory polyurethane nanocomposites

Güneş, İbrahim; Cao, Feina; Jana, Sadhan C.

doi:10.1016/j.polymer.2008.03.021

Cited by 233 publications

(173 citation statements)

References 81 publications

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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%

“…The second part of the study considered compounds of PB and shape memory PU with crystalline soft segments and evaluated how inclusion of PB improved the shape memory properties. Note that PB domains can hinder phase separation of urethane hard segments [48] and the inclusion of nanoparticles has detrimental effects on crystallization of PU soft domains [35,36,40]. In view of these, this study also focused on in the influence of PB domains on the crystallinity of PU soft domains.…”

Section: Open Accessmentioning

confidence: 99%

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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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Section: Open Accessmentioning

confidence: 99%

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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“…However, in some cases fillers are prone to have negative effects on the shape recoverability of an SMP due to their size and substantially higher stiffness compared to the matrix polymer. At high loading levels, they may even disturb the polymer networks responsible for SM functionality [198]. Razzaq and Frormann [199] have shown that loading an ether-based SMPU from Diaplex Co., Ltd. with 40 wt% AlN particles increases the thermal conductivity from 0.12 to 0.44 W/mK.…”

Section: Review Of Progressmentioning

confidence: 99%

Review on the Functional Determinants and Durability of Shape Memory Polymers

Pretsch

2010

Polymers

112

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Shape memory polymers (SMP) belong to the class of stimuli-responsive materials and have generated significant research interest. Their capability to retain an imposed, temporary shape and to recover the initial, permanent shape upon exposure to an external stimulus depends on the "functional determinants", which in simplistic terms, can be divided into structural/morphological and processing/environmental factors. The primary aim of the first part of this review is to reflect the knowledge about these fundamental relationships. In a next step, recent advances in shape memory polymer composites are summarized. In contrast to earlier reviews, studies on the impairment of shape memory properties through various factors, such as aging, compression and hibernation, lubricants, UV light and thermo-mechanical cycling, are extensively reviewed. Apart from summarizing the state-of-the-art in SMP research, recent progress is commented.

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“…Much previous research work has focused on structureÐproperty relationships of various SMP materials based on chemically or physically cross-linked polymer systems (Kim et al, 1998;Gunes et al, 2008;Ma et al, 2013). Most of the current research in the field of SMPs is focused on the intrinsic function of the SME, functional composite, the exploitation of different stimuli as triggers and demonstration of potential application (Ma et al, 2013;Bellin et al, 2006;Tobushi et al, 2008;Lu et al, 2009;Lu et al, 2010;Luo and Mather 2010;Lantada et al, 2010;Le et al, 2011;Lu et al, 2011b;Lu et al, 2011a;Fejos et al, 2012;Lu 2012a;Lu 2012b;Fejos and Karger-Kocsis 2013;Lu et al, 2013;Lu et al, 2013c;Lu et al, 2014b).…”

Section: Introductionmentioning

confidence: 99%

Temperature sensing and actuating capabilities of polymeric shape memory composite containing thermochromic particles

Yao

Lin

2015

Pigment &Amp; Resin Technology

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Purpose -The study reported here intended to create and to study multifunctional shape memory polymer (SMP) composite having temperature sensing and actuating capabilities by embedding thermochromic particles within the polymer matrix.Design/methodology/approach -The multifunctional materials were fabricated following a process consisting of blending (of the thermochromic particles and the SMP at various ratios), mixing, degasing, moulding and thermal curing, thus incorporating thermochromic particles within the polymer. The effect of the thermochromic particles on the thermomechanical properties and thermally responsive shape memory effect (SME) of the resulting multifunction SMP composites were characterised and interpreted.Findings -It was found that exposure of the composites to temperatures above 70°C led to a pronounced, reproducibly reversible change of their colour that was recorded by the thermal and electrical actuation approaches. It was also found that the colour of the composites was independent of the mechanical state of the SMP. Such effects enabled monitoring of the onset of the set/release temperature of the SMP matrix. Furthermore, the combination of thermochromic additive and the SMP resulted in significantly improved thermomechanical strength, absorption of infrared radiation and temperature distribution of the SMP composites.1 Corresponding author, e-mail: yaoyt@hit.edu.cnResearch implications -The temperature sensing and actuating capabilities of the polymeric shape memory composites developed through this study will help to extend the field of potential applications of such composites to fields including sensors, actuators, security labels and information dissemination, where colour indication is an advantageous feature.Originality/value -The shape memory polymer (SMP) composites capable of temperature sensing and actuating are novel.

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Evaluation of nanoparticulate fillers for development of shape memory polyurethane nanocomposites

Cited by 233 publications

References 81 publications

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

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

Review on the Functional Determinants and Durability of Shape Memory Polymers

Temperature sensing and actuating capabilities of polymeric shape memory composite containing thermochromic particles

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