Fabrication of well‐defined shape memory graft polymers derived from biomass: An insight into the effect of side chain architecture on shape memory properties

Lu, Chuanwei; Liu, Yupeng; Yu, Juan; Wang, Chunpeng; Wang, Jifu; Chu, Fuxiang

doi:10.1002/pola.29052

Cited by 10 publications

(3 citation statements)

References 47 publications

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“…The peak temperature of tan δ was increased with increasing DAGMA content, in accordance with previous reports . Similarly, tan δ also showed a broad shoulder peak, indicating phase separation …”

Section: Resultsmentioning

confidence: 99%

Two‐Step 3 D‐Printing Approach toward Sustainable, Repairable, Fluorescent Shape‐Memory Thermosets Derived from Cellulose and Rosin

Wang

et al. 2019

ChemSusChem

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Efficiently converting biomass into multifunctional polymerized materials is a challenge to effect high‐valued utilization of biomass resources. A two‐step 3 D‐printing approach has been developed to fabricate a class of robust, fluorescent shape‐memory thermosets from cellulose and rosin‐based photosensitive 3 D‐printing resin solution. The stereolithography 3 D printing was first performed to form the first crosslinked network by UV‐induced chain‐growth polymerization, which fixed the shape of thermoset. Subsequently, isocyanate was applied to react with hydroxy in the monomer to form the second crosslinked network by thermally induced step‐growth polymerization. The formation of a dual‐cure network, leading to phase separation and increased crosslinking density, could greatly improve the mechanical and thermal properties of 3 D‐printed thermosets and endow them with thermally triggered shape‐memory properties and excellent repairability. The 3 D‐printed thermosets are found to have strong luminescence resulting from aggregation‐induced emission originating from rosin. In addition, these 3 D‐printed thermosets could degrade in the presence of NaOH aqueous solution and in situ achieved a range of flexible conductive hydrogels that have important potential application in the flexible electronic materials and smart photoelectric materials.

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Section: Resultsmentioning

confidence: 99%

Two‐Step 3 D‐Printing Approach toward Sustainable, Repairable, Fluorescent Shape‐Memory Thermosets Derived from Cellulose and Rosin

Wang

et al. 2019

ChemSusChem

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“…Summarizing T g and T di values of fully and partially biobased SMPs reported in literature so far (Figure b, Table S1), − ,,− it is interesting to conclude that poly(IE-dea) and poly(G-dea) have superiorly high, and in fact the highest, thermal resistance among all available fully biobased SMPs reported so far.…”

Section: Results and Discussionmentioning

confidence: 85%

Development and Mechanism of High-Performance Fully Biobased Shape Memory Benzoxazine Resins with a Green Strategy

Sha

Yuan

Liang

et al. 2020

ACS Sustainable Chem. Eng.

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Developing high-performance fully biobased shape memory thermosets with a green strategy is a challenging topic of great interest. Herein, two unique fully biobased benzoxazine resins with excellent shape memory properties, denoted as poly(IE-dea) and poly(G-dea), were developed by synthesizing two fully biobased benzoxazine monomers (IE-dea and G-dea) using a solvent-free method. The thermal, mechanical, and shape memory properties of poly(IE-dea) and poly(G-dea) were studied. Among the fully biobased shape memory polymers reported so far, poly(IE-dea) and poly(G-dea) have the highest glass transition temperatures (138 and 216 °C), initial thermal decomposition temperatures (340 and 347 °C), and tensile strengths (85.1 ± 2.5 and 65.9 ± 2.7 MPa). In addition, poly(IE-dea) and poly(G-dea) exhibit excellent shape memory properties. After four shape memory cycles, their shape fixity ratios are 97.7–98.0% and 96.7–97.2%, respectively, and their shape recovery ratios are 96.7–97.2% and 93.0–93.4%. In fact, they are the first two fully neat biobased shape memory benzoxazine resins up-to-date. The mechanism behind the excellent integrated performances of poly(IE-dea) and poly(G-dea) results from unique integrated actions of the flexible decane segment and rigid cross-linked structure from the polymerization of oxazine rings.

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“…The shape fixity ratio ( R f ) was calculated according to Equation (1) 31 :

R_{normalf} = \frac{ε_{u}}{ε_{m}} \times 100 %

where

ε_{normalm}

and

ε_{normalu}

were the initial strain upon loading and fixed strain, respectively.…”

Section: Methodsmentioning

confidence: 99%

Fabrication of sustainable, toughening epoxy thermosets with rapidly thermal and light‐triggered shape memory property

Wang

Shen

et al. 2022

Journal of Polymer Science

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Shape memory epoxy thermosets (SMETs) have attracted more and more attention in artificial intelligence applications. However, the fabrication of lightweight and high-strength bio-based SMET with multiple-response shape memory properties remains a challenge. Herein, a thermal and light-triggered bio-based SMET with excellent mechanical property and toughness is prepared. To fabricate the SMET, a bio-based curing agent (CFMA) derived from cardanol, menthane diamine and furfural is utilized to react with epoxy resin E51 to prepare the SMET. The curing kinetics of SMET is measured by non-isothermal DSC, and the reaction order is 0.784. The SMETs have excellent thermal stability and mechanical strength. Based on the toughening effect of the bio-based curing agent, the SMETs exhibit excellent stretchability, and the toughness of

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Fabrication of well‐defined shape memory graft polymers derived from biomass: An insight into the effect of side chain architecture on shape memory properties

Cited by 10 publications

References 47 publications

Two‐Step 3 D‐Printing Approach toward Sustainable, Repairable, Fluorescent Shape‐Memory Thermosets Derived from Cellulose and Rosin

Two‐Step 3 D‐Printing Approach toward Sustainable, Repairable, Fluorescent Shape‐Memory Thermosets Derived from Cellulose and Rosin

Development and Mechanism of High-Performance Fully Biobased Shape Memory Benzoxazine Resins with a Green Strategy

Fabrication of sustainable, toughening epoxy thermosets with rapidly thermal and light‐triggered shape memory property

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