Effect of the γ-radiation on the properties of epoxy-based shape memory polymers

Leng, Jinsong; Xie, Fang; Wu, Xuelian; Liu, Yanju

doi:10.1177/1045389x13504474

Cited by 53 publications

(20 citation statements)

References 39 publications

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“…This is the right place to emphasize that SMEPs have excellent durability, i.e., resistance to different environments, including high energy irradiation [ 71 , 72 ]. In a comprehensive review, Pretsch analysed the “functional determinants” of SMPs, including SMEPs [ 73 ].…”

Section: One-way Dual-shape Memory Epoxy (Ep) Formulationsmentioning

confidence: 99%

Review of Progress in Shape Memory Epoxies and Their Composites

2017

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Shape memory polymer (SMP) is capable of memorizing one or more temporary shapes and recovering successively to the permanent shape upon various external stimuli. Beside of the above mentioned one-way variants, also two-way shape memory polymers (SMPs) and shape memory (SM) systems exist which feature a reversible shape change on the basis of "on-off switching" of the external stimulus. The preparation, properties and modelling of shape memory epoxy resins (SMEP), SMEP foams and composites have been surveyed in this exhaustive review article. The underlying mechanisms and characteristics of SM were introduced. Emphasis was put to show new strategies on how to tailor the network architecture and morphology of EPs to improve their SM performance. To produce SMEPs novel preparation techniques, such as electrospinning, ink printing, solid-state foaming, were tried. The potential of SMEPs and related systems as multifunctional materials has been underlined. Added functionality may include, among others, self-healing, sensing, actuation, porosity control, recycling. Recent developments in the modelling of SMEPs were also highlighted. Based on the recent developments some open topics were deduced which are merit of investigations in future works.

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Section: One-way Dual-shape Memory Epoxy (Ep) Formulationsmentioning

confidence: 99%

Review of Progress in Shape Memory Epoxies and Their Composites

2017

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“…This could explain why the stiffness of the SMP was stable with a lower dosage of γ-radiation, while the mechanical properties showed an apparent reduction with a higher dose of γ-radiation. Even so, after 1 × 10 6 Gy of γ-radiation exposure, the tensile strength and elasticity modulus could still be maintained at greater than 26 MPa and 1.36 GPa, respectively, which was strong enough to serve as a structural material in the weightless space environment (Leng et al, 2014). Additionally, representative space-deployable structures, including a deployable truss (Zhang et al, 2014b), have been studied both theoretically and experimentally.…”

Section: Typical Thermoset Smpsmentioning

confidence: 99%

Thermoset shape memory polymers and their composites

Xie

Huang

Leng

et al. 2016

Journal of Intelligent Material Systems and Structures

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This article reviews the main progress in the development of typical thermoset shape memory polymers. Thermoset polymers are usually stronger in their microstructure than thermoplastic polymers due to their covalently crosslinked three-dimensional networks. The virtues of thermoset polymers make them great source materials for shape memory polymers. However, their three-dimensional networks endow thermoset shape memory polymers with not only high shape fixity rates and shape recovery rates but also low deformation abilities and brittleness. In the past decade, many breakthroughs have been made regarding thermoset shape memory polymers. Typical thermoset materials, such as epoxy resin, cyanate resin, thermoset polyurethane, polyimide, and polystyrene, have been studied as raw materials for shape memory polymers. Studies on thermoset shape memory polymers have been carried out to not only improve their fundamental properties (i.e. broadening of their operating temperatures and service environments and enhancing their thermal stabilities and mechanical properties) but also introduce functional performance properties (e.g. responsiveness to light, electricity, magnetism, and chemical stimuli). This article aims to present a brief review of the development of thermoset shape memory polymers, including the selection and preparation of materials, the improvement of properties, the functionalization of their composites, and their potential applications.

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“…Shape memory effect (SME) is an intrinsic property of polymer materials, but different polymers with different molecular structures and components exhibit varying degrees of shape-memory properties [2]. Various SMPs with excellent SME have been developed, such as shape-memory epoxy [8][9][10], shape-memory cyanate [11], shape-memory styrene [12], shape-memory polyurethane [1], and shape-memory polycaprolactone [13]. A series of SMPs with dual-, triple-or multi-SMEs have also been developed.…”

Section: Introductionmentioning

confidence: 99%

Mechanical Models, Structures, and Applications of Shape-Memory Polymers and Their Composites

Xin

Liu

et al. 2019

Acta Mech. Solida Sin.

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Shape-memory polymers (SMPs) and their composite materials are stimuliresponsive materials that have the unique characteristics of lightweight, large deformation, variable stiffness, and biocompatibility. This paper reviews the research status of the mechanical models for SMPs, shape-memory nanocomposites and shape-memory polymer composites (SMPCs); it also introduces some spatially deployable structures, such as hinges, beams, and antennae based on SMPCs. In addition, the deformation types of 4D printing structures and the potential applications of this technology in robots and medical devices are also summarized.The mechanism of shape-memory cycles and the mechanical behavior of SMPs can be described by establishing thermomechanical models, which lay the theoretical foundations for the rational design of SMP structures. This section will focus on the constitutive models for SMPs, the micromechanical models of SMPNs, and the buckling behavior of SMPCs.

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Effect of the γ-radiation on the properties of epoxy-based shape memory polymers

Cited by 53 publications

References 39 publications

Review of Progress in Shape Memory Epoxies and Their Composites

Review of Progress in Shape Memory Epoxies and Their Composites

Thermoset shape memory polymers and their composites

Mechanical Models, Structures, and Applications of Shape-Memory Polymers and Their Composites

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