Quadruple‐shape‐memory effect of TPI/LDPE/HDPE composites

Xian, Jiayu; Geng, Jieting; Wang, Yan; Xia, Lin

doi:10.1002/pat.4209

Cited by 20 publications

(18 citation statements)

References 33 publications

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“…ER is mainly composed of trans-1,4-polyisoprene, which is the isomer of nature rubber cis-1,4-polyisoprene from Hevea brasiliensis. ER can be used as a type of shape memory material after being appropriately cross-linked [28][29][30][31]. The introduction of ionic cross-linking depends on the implementation of ZDMA, which is a typical ionic compound.…”

Section: Introductionmentioning

confidence: 99%

“…It can be used as a rubber reinforcement, and also reacts with the rubber matrix [32,33]. Generally, ZDMA undergoes a high-temperature process in the rubber system and produces three structures in rubber composites: (a) it exists in the form of ZDMA, (b) it forms polymerized ZDMA (PZDMA) products, and (c) it generates a PZDMA-graft-rubber structure [31,34]. Some studies have been conducted on rubber and ZDMA, such as the research work by Qinghong Fang [35].…”

Section: Introductionmentioning

confidence: 99%

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Facile Fabrication of Eucommia Rubber Composites with High Shape Memory Performance

Xia¹,

Meng²,

Ma³

2021

Polymers

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We processed a series of shape memory Eucommia rubber (ER) composites with both carbon–carbon and ionic cross-linking networks via a chemical cross-linking method. The influence of the carbon–carbon cross-linking and ion cross-linking degree of ER composites on curing, mechanical, thermal, and shape memory properties were studied by DSC, DMA, and other analytical techniques. Dicumyl peroxide (DCP) and zinc dimethacrylate (ZDMA) played a key role in preparing ER composites with a double cross-linking structure, where DCP initiated polymerization of ZDMA, and grafted ZDMA onto polymer molecular chains and cross-linked rubber molecular chains. Meanwhile, ZDMA combined with rubber macromolecules to build ionic cross-linking bonds in composites under the action of DCP and reinforced the ER composites. The result showed that the coexistence of these two cross-linking networks provide a sufficient restoring force for deformation of shape memory composites. The addition of ZDMA not only improved the mechanical properties of materials, but also significantly enhanced shape memory performance of composites. In particular, Eucommia rubber composites exhibited outstanding mechanical properties and shape memory performance when DCP content was 0.2 phr.

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Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Facile Fabrication of Eucommia Rubber Composites with High Shape Memory Performance

Xia¹,

Meng²,

Ma³

2021

Polymers

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“…In most cases, EUG was blended with other materials, such as cispolyisoprene, [19][20][21][22] chlorobutadiene rubber, 23 cellulose, 24,25 poly(ε-caprolactone), 26 polylactide, 27 polypropylene, 28 to improve the properties of composites or was used to prepare shape memory materials. [29][30][31][32][33][34][35] How to obtain EUG-based elastomer as a substitute for NR has gradually attracted enough attention in recent years. In 1980s, Yan discovered a method to vulcanize EUG by utilizing special formulations and mixing conditions.…”

Section: Introductionmentioning

confidence: 99%

“…Therefore, almost no EUG was used alone in the rubber industry. In most cases, EUG was blended with other materials, such as cis‐ polyisoprene, 19–22 chlorobutadiene rubber, 23 cellulose, 24,25 poly(ε‐caprolactone), 26 polylactide, 27 polypropylene, 28 to improve the properties of composites or was used to prepare shape memory materials 29–35 …”

Section: Introductionmentioning

confidence: 99%

A high toughness elastomer based on naturalEucommia ulmoidesgum

Zhao

et al. 2020

J of Applied Polymer Sci

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Eucommia ulmoides gum (EUG) is a kind of bio-based polymer with similar structure to natural rubber (NR). However, it behaves as hard plastic at room temperature due to crystallization, which makes it not as widely used as NR. Herein, a new bio-based elastomer (HEUG) was prepared by rhodiumcatalyzed hydrogenation of EUG for the first time. 1 H-NMR and 13 C-NMR spectroscopy confirmed the structure of HEUG, and wide angle X-ray diffraction, polarizing light microscopy showed that the crystal was gradually destroyed in the hydrogenation process, finding that when the degree of hydrogenation is more than 16.5%, HEUG transformed from plastic to elastomer at room temperature. Besides, the Synchrotron Radiation experiment showed that HEUG with hydrogenation of 85.9% could be self-reinforced by strain-induced crystallization during stretching, which make it has excellent tensile strength and toughness (21.4 MPa and 68.1 MJ m −3 , respectively). This new bio-based elastomer has the potential to replace NR and has a wide application prospect in rubber industry.

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“…The soft and hard segments in polyurethanes govern the transitions behavior triggered by radiation, sound, heat, etc., resulting in the shape memory effect. The shape memory effect in polyurethane and its composites can be one-way, two-way, triple or quadruple based on the number of transition temperatures and soft and hard contents [2][3][4].…”

Section: Introductionmentioning

confidence: 99%

Shape Memory Polyurethane and its Composites for Various Applications

2019

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The inherent capability to deform and reform in a predefined environment is a unique property existing in shape memory polyurethane. The intrinsic shape memory ability of the polyurethane is due to the presence of macro domains of soft and hard segments in its bulk, which make this material a potential candidate for several applications. This review is focused on manifesting the applicability of shape memory polyurethane and its composites/blends in various domains, especially to human health such as shielding of electromagnetic interference, medical bandage development, bone tissue engineering, self-healing, implants development, etc. A coherent literature review highlighting the prospects of shape memory polyurethane in versatile applications has been presented.

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Quadruple‐shape‐memory effect of TPI/LDPE/HDPE composites

Cited by 20 publications

References 33 publications

Facile Fabrication of Eucommia Rubber Composites with High Shape Memory Performance

Facile Fabrication of Eucommia Rubber Composites with High Shape Memory Performance

A high toughness elastomer based on naturalEucommia ulmoidesgum

Shape Memory Polyurethane and its Composites for Various Applications

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