Actuation design for high‐performance shape memory polyurethanes

Kim, Min Ji; Kim, Byung Kyu

doi:10.1002/polb.23359

Cited by 7 publications

(3 citation statements)

References 27 publications

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Section: Typical Thermoset Smpsmentioning

confidence: 99%

“…Ultraviolet (UV) curing is commonly used to form crosslink networks in shape memory PURs by including photo-initiator (Kim and Kim, 2013; Lee et al, 2011). Kim and Kim (2013) synthesized a series of shape memory PURs with varying T g s from 6°C to 45°C using a UV curing technique or a sol–gel process. In the UV curing method, the linear PUR prepolymers with different molecular weights were first capped with 2-hydroxyl ethylacrylate (HEA) and then mixed with the photo-initiator to finish the drying and UV cure processes (Figure 14).…”

Section: Typical Thermoset Smpsmentioning

confidence: 99%

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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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Section: Typical Thermoset Smpsmentioning

confidence: 99%

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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“…At high contents, aggregation of VC reduced crosslinking density and mechanical properties of amorphous polymers. According to the ideal rubber theory modulus (E) is given by Equation (3) [28]:…”

Section: Thermal Propertiesmentioning

confidence: 99%

Biodegradable waterborne polyurethane with modified hydroxyethylcellulose

Lee¹,

Bae²,

Kim³

2018

Express Polym. Lett.

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The waterborne polyurethane (WPU)/hydroxyethyl cellulose (HEC) chemical hybrids were synthesized by incorporating vinyltrimethoxysilane (VTMS) modified HEC (VC) into the WPU. Effects of VC on the contact angle, gel content, thermal and mechanical properties of the cast films, and biodegradation in cellulase solution were evaluated. It was found that the VTMS modified HEC provided the WPU with multifunctional crosslinks as well as conventional reinforcing fillers and biodegradability.

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