Triple Shape Memory Effects of Cross-Linked Polyethylene/Polypropylene Blends with Cocontinuous Architecture

Zhao, Jun; Chen, Min; Wang, Xiaoyan; Zhao, Xiaodong; Wang, Zhenwen; Dang, Zhi‐Min; Ma, Lan; Hu, Guohua; Chen, Fenghua

doi:10.1021/am400769j

Cited by 143 publications

(124 citation statements)

References 46 publications

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“…The similar drawbacks are contained in some recently published papers [17,18]. One-way 'triple'-shape behavior of crystallizable covalent networks on the basis of PE/polypropylene (PP) blends with co-continuous phase morphology and on the basis of PCL grafted by 0.5-2.0 wt% of polydopamin (PDA) was evaluated as 'pronounced' and 'good', respectively, using temperature dependencies of SM recovery of these networks after their two-step programming [17,18]. However, this interpretation cannot be accepted because the used temperature-time program contained the isothermal segment between two temperature ramps just within temperature range where the first step of SM recovery strain arises.…”

Section: One-way Sme In Polymeric Materialsmentioning

confidence: 76%

“…Invertible two-way SM effect can be observed in each crystallizable polymer network if the suitable # c and load values are chosen [7][8][9]17]. The results demonstrated in Figure 9 prove that HDPE cross-linked by peroxide is not an exception to this statement [48].…”

Section: Two-way Sm Behavior Of Heterogeneous Sm Polymer Network 61mentioning

confidence: 78%

“…Number and location of these isothermal segments and steps in SM recovery curves show an explicit correlation, which points to the kinetic nature of mentioned steps. The similar drawbacks are contained in some recently published papers [17,18]. One-way 'triple'-shape behavior of crystallizable covalent networks on the basis of PE/polypropylene (PP) blends with co-continuous phase morphology and on the basis of PCL grafted by 0.5-2.0 wt% of polydopamin (PDA) was evaluated as 'pronounced' and 'good', respectively, using temperature dependencies of SM recovery of these networks after their two-step programming [17,18].…”

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confidence: 76%

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Shape-memory behavior of cross-linked semi-crystalline polymers and their blends

Kolesov¹,

Dolynchuk²,

Radusch

2015

Express Polym. Lett.

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The aim of present mini-review is an attempt to perform the comparative description and analysis of results of our experimental investigation and of physically justified modeling of unconstrained one-way shape-memory effect (SME) and invertible twoway SME under load in crystallizable covalent polymer networks. Besides the dual SME in cross-linked homopolymers, the one-and two-way multi-shape behavior in heterogeneous networks on the basis of binary and ternary blends will be discussed. The special focus in present work is directed on the key role of phase morphology of cross-linked polymer blends varied by blend composition on the performances of multiple SM behavior. Brief overview of various types of SME in polymeric materialsIn the last decades the SME in polymeric materials was the research object of hundreds of original papers and many reviews (see for instance [1][2][3][4][5][6][7][8]). There are four main types of stimuli, which are able to trigger a shape change of polymeric materials: temperature variation, chemical reactions, light, and mechanical forces [2][3][4][5][6][7]. Correspondingly, among polymeric materials the thermo-, chemo-, photo-, and mechano-responsive material groups can be classified. In majority of publications, which consider SM behavior of polymer systems, the subject of investigation are thermo-responsive polymeric materials. According to the existence of ordered Abstract. The present study deals with thermally induced one-way and invertible two-way shape-memory effect (SME) in covalent networks on the basis of crystallizable (co)polymers and their blends and is an attempt to generalize the results of own investigation received by the authors in the last ten years. The main focus of work clearly lies on research of covalently crosslinked binary and ternary blends having two and three crystalline phases with different thermal stability, respectively. The existence of two or three crystalline phases possessing different melting and crystallization temperatures in heterogeneous polymer networks can lead to triple-shape or even quadruple-shape behavior of such networks. However, the performed investigations point to crucial effect of phase morphology of crosslinked polymer blends on multiplicity of their shapememory behavior beside the influence of blend content, crystallinity and cross-link density of blend phases as well as of processing conditions. For instance, triple-shape memory behavior in binary blends can be realized only if the continuous phase has a lower melting temperature than the dispersed phase. Cross-linked polymer blends are a facile alternative to expensive and complex synthesis of interpenetrating or block-copolymer networks used for shape memory polymers. In addition to findings of experimental investigation of SME in crystallizable covalent polymer networks, the results of modeling their shape-memory behavior on the basis of self-developed physically reasonable model have been briefly described and discussed. Thereby, good accordance between results of theory and ...

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Section: One-way Sme In Polymeric Materialsmentioning

confidence: 76%

Section: Two-way Sm Behavior Of Heterogeneous Sm Polymer Network 61mentioning

confidence: 78%

mentioning

confidence: 76%

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Shape-memory behavior of cross-linked semi-crystalline polymers and their blends

Kolesov¹,

Dolynchuk²,

Radusch

2015

Express Polym. Lett.

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“…21,22 To date, TSMPs have been widely applied in intelligent medical devices, assembling systems, and minimally invasive surgery. 18,23 However, in the face of everincreasing complex demands on the use of intelligent medical devices, TSMPs can be used under two transition temperatures which provide more flexible application in intelligent medical devices compared to the traditional SMPs with only one particular transition temperature. Among them, the vascular application has received considerable attention.…”

Section: ■ Introductionmentioning

confidence: 99%

Design of Triple-Shape Memory Polyurethane with Photo-cross-linking of Cinnamon Groups

Wang

Yang

Chen

et al. 2013

ACS Appl. Mater. Interfaces

105

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A triple-shape memory polyurethane (TSMPU) with poly(ε-caprolactone) -diols (PCL-diols) as the soft segments and diphenyl methane diisocyanate (MDI), N,N-bis (2-hydroxyethyl) cinnamamide (BHECA) as the hard segments was synthesized via simple photo-crosslinking of cinnamon groups irradiated under λ > 280 nm ultraviolet (UV) light. Fourier transform infrared spectroscopy (FT-IR), proton nuclear magnetic resonance ( 1 H-NMR) and ultraviolet-visible absorption spectrum (UV−vis) confirmed the chemical structure of the material. Differential scanning calorimetry (DSC) and dynamic mechanical analysis (DMA) results demonstrated that the photocrosslinked polymer possessed two transition temperatures, one is due to the melting point of the soft segment PCL-diols, and the other is due to the glass transition temperature. All these contributed to the cross-linked structure of the hard segments and resulted in an excellent triple-shape memory effect. Alamar blue assay showed that the material has good non-cytotoxicity and can be potentially used in biomaterial devices.

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“…3,4 With this attractive property, SMP has great potential in biomedical and surgical materials, smart fabrics, aerospace industry, temperature sensors, and actuators. [5][6][7] During the past decades, many polymers have been adopted to prepare SMPs, such as polyolefines, 8 polystyrene, 9 polysiloxane, 10 poly(methyl-acrylates), 11 polycaprolactone, 12 and DNA. 13 To realize shape memory effect, polymers need to fulfill suitable molecular networks architecture, which consists of two aspects: reversible phase and fixed phase.…”

Section: Introductionmentioning

confidence: 99%

High temperature shape memory polyimide ionomer

Bai

Long

Liu

2016

J of Applied Polymer Sci

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In this work, a high temperature shape memory polymer based on polyimide (PI) ionomer is prepared by introducing ionic crosslinked interaction. The ionic crosslinked points are introduced to polymer networks through the reaction between polyamic acid and calcium hydroxide before thermal imidization. The crosslinked reaction, microtopography, mechanical, thermal, and shape memory properties of PI ionomers are systematically investigated. The results show the introduction of ionic crosslinked interaction could enhance the glass transition temperature, mechanical, and shape recovery performance of ODA-ODPA, a PI. The prepared ionomers exhibit good high temperature shape memory properties around 270 8C. The shape fixation and shape recovery ratio are over 99% and 90%, respectively. This method provided a new sight of preparing high temperature shape memory polymer, which could be used in severe conditions, like aerospace industry field.

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Triple Shape Memory Effects of Cross-Linked Polyethylene/Polypropylene Blends with Cocontinuous Architecture

Cited by 143 publications

References 46 publications

Shape-memory behavior of cross-linked semi-crystalline polymers and their blends

Shape-memory behavior of cross-linked semi-crystalline polymers and their blends

Design of Triple-Shape Memory Polyurethane with Photo-cross-linking of Cinnamon Groups

High temperature shape memory polyimide ionomer

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