Vitrimer composites based on aligned graphite flakes: Accelerated and anisotropic stress relaxation and malleability

复合材料 环氧树脂 材料科学 应力松弛 放松(心理学) 压力(语言学) 蠕动 心理学 社会心理学 语言学 哲学
作者
Yan Li,Lin Zhou,Hong Zhang,Zhongtao Chen,Yinyu Zhang,Lixian Song,Yeping Wu,Kuibao Zhang,Xiuli Zhao,Mao Chen
出处
期刊:Polymer [Elsevier]
卷期号:295: 126764-126764
标识
DOI:10.1016/j.polymer.2024.126764
摘要

Vitrimers have attracted great interest in the past a dozen years and several ways have been developed to improve their appealing dynamic properties caused by the networks rearrangement. However, it is still a great challenge to improve their dynamic properties like stress relaxation and malleability by introducing fillers that commonly restricted chain mobility in vitrimer composites. Herein, vitrimer composites including single-layer epoxy vitrimer (SEV) composites and multi-layer epoxy vitrimer (MEV) composites were prepared by introducing aligned graphite flakes (GFs) into epoxy vitrimer matrix. Different from the suppressing effect of particle fillers in vitrimer networks, the aligned GFs improved the dynamic properties of vitrimer composites, which accelerated the stress relaxation behaviors and optimized the malleable properties. Meanwhile, the vitrimer composites exhibited unique anisotropic stress relaxation and malleability interestingly. For instance, the characteristic time (τ) of stress relaxation decreased from 1190s (reference epoxy vitrimer) to 863s (MEV composites-horizontal) and 773s (MEV composites-vertical) at 160 °C, while the critical temperature (Tv) of malleability decreased from 160 °C (reference epoxy vitrimer) to 155 °C (MEV composites-horizontal) and 143 °C (MEV composites-vertical). Moreover, the activation energy (Ea) of vitrimer composites increased and their prefactor τ0 decreased, resulting in their improved stability at service condition and promoted dynamic properties at malleable state. The accelerated and anisotropic dynamic properties of vitrimer composites was achieved by introducing aligned GFs for the first time.
最长约 10秒,即可获得该文献文件

科研通智能强力驱动
Strongly Powered by AbleSci AI
更新
大幅提高文件上传限制,最高150M (2024-4-1)

科研通是完全免费的文献互助平台,具备全网最快的应助速度,最高的求助完成率。 对每一个文献求助,科研通都将尽心尽力,给求助人一个满意的交代。
实时播报
科研通AI2S应助风中莫英采纳,获得10
1秒前
嘟嘟发布了新的文献求助10
1秒前
2秒前
NexusExplorer应助weiyu_u采纳,获得30
3秒前
火星上的碧彤完成签到,获得积分10
7秒前
丘比特应助焕尘采纳,获得10
10秒前
12秒前
13秒前
14秒前
su完成签到 ,获得积分10
14秒前
舒适的涑完成签到 ,获得积分10
14秒前
i_jueloa完成签到,获得积分10
15秒前
粗心的菀完成签到 ,获得积分10
15秒前
16秒前
16秒前
赵焱峥完成签到,获得积分10
17秒前
18秒前
快乐星月完成签到,获得积分10
18秒前
妮妮完成签到 ,获得积分10
19秒前
小飞完成签到 ,获得积分10
19秒前
lemonfang完成签到,获得积分10
20秒前
20秒前
我要毕业完成签到 ,获得积分10
21秒前
坚定白风发布了新的文献求助10
22秒前
22秒前
woxiangbiye完成签到,获得积分10
24秒前
25秒前
华仔应助冬虫夏草采纳,获得10
25秒前
wxyllxx发布了新的文献求助10
26秒前
忧郁绣连发布了新的文献求助10
26秒前
27秒前
MADAO完成签到,获得积分10
27秒前
lemonfang发布了新的文献求助10
29秒前
村长热爱美丽完成签到 ,获得积分10
33秒前
疯狂吃辣完成签到 ,获得积分10
33秒前
woxiangbiye发布了新的文献求助10
34秒前
Owen应助坚定白风采纳,获得10
35秒前
1781266完成签到,获得积分10
35秒前
36秒前
37秒前
高分求助中
Sustainability in Tides Chemistry 2800
Kinetics of the Esterification Between 2-[(4-hydroxybutoxy)carbonyl] Benzoic Acid with 1,4-Butanediol: Tetrabutyl Orthotitanate as Catalyst 1000
The Young builders of New china : the visit of the delegation of the WFDY to the Chinese People's Republic 1000
Rechtsphilosophie 1000
Bayesian Models of Cognition:Reverse Engineering the Mind 888
Handbook of Qualitative Cross-Cultural Research Methods 600
Very-high-order BVD Schemes Using β-variable THINC Method 568
热门求助领域 (近24小时)
化学 医学 生物 材料科学 工程类 有机化学 生物化学 物理 内科学 纳米技术 计算机科学 化学工程 复合材料 基因 遗传学 催化作用 物理化学 免疫学 量子力学 细胞生物学
热门帖子
关注 科研通微信公众号,转发送积分 3137328
求助须知:如何正确求助?哪些是违规求助? 2788413
关于积分的说明 7786262
捐赠科研通 2444571
什么是DOI,文献DOI怎么找? 1299936
科研通“疑难数据库(出版商)”最低求助积分说明 625680
版权声明 601023