Contribution of silane modification of halloysite nanotube to its poly (butylene terephthalate)-based nanocomposites: structural, mechanical and thermal properties DOI Creative Commons

Mustafa Şenyel,

Ali Sinan Dike

Polymer Bulletin, Год журнала: 2024, Номер 81(11), С. 9851 - 9870

Опубликована: Фев. 22, 2024

Abstract Polybutylene terephthalate (PBT) nanocomposites were melt-blended with two types of Turkish halloysite nanotubes (HN). Naturally occurring HN samples used to produce PBT-based composites at the compositions 1%, 3%, 5%, and 10%. Findings neat silane-coated HN-containing composite compared investigate interfacial adhesion between polymer matrix reinforcement material. According test results, a 1% amount was found be most suitable option in case mechanical thermal properties composites. Additionally, silane-modified grade displayed highly indicative improvements pristine clay due better PBT accomplished. Property enhancements achieved for containing low contents confirmed by morphological examinations. As result, PBT/ HN-S sample bookmarked as fabricate HN-reinforced terms mechanical, thermo-mechanical, morphological, thermal, physical performances based on findings this study. Silane-modified grades exhibited they more applications PBT. Graphical abstract

Язык: Английский

New Advances in Covalent Network Polymers via Dynamic Covalent Chemistry DOI
Zepeng Lei, Hongxuan Chen, Shaofeng Huang

и другие.

Chemical Reviews, Год журнала: 2024, Номер 124(12), С. 7829 - 7906

Опубликована: Июнь 3, 2024

Covalent network polymers, as materials composed of atoms interconnected by covalent bonds in a continuous network, are known for their thermal and chemical stability. Over the past two decades, these have undergone significant transformations, gaining properties such malleability, environmental responsiveness, recyclability, crystallinity, customizable porosity, enabled development integration dynamic chemistry (DCvC). In this review, we explore innovative realm polymers focusing on recent advances achieved through application DCvC. We start examining history fundamental principles DCvC, detailing its inception core concepts noting key role reversible bond formation. Then reprocessability DCvC is thoroughly discussed, starting from milestones that marked evolution progressing to current trends applications. The influence crystallinity then reviewed, covering diversity, synthesis techniques, functionalities. concluding section, address challenges faced field speculates potential future directions.

Язык: Английский

Процитировано

65

Circularity in polymers: addressing performance and sustainability challenges using dynamic covalent chemistries DOI Creative Commons
Tianwei Yan, Alex H. Balzer, Katie M. Herbert

и другие.

Chemical Science, Год журнала: 2023, Номер 14(20), С. 5243 - 5265

Опубликована: Янв. 1, 2023

This review provides a multidisciplinary overview of the challenges and opportunities for dynamic covalent chemistry-based macromolecules towards design new, sustainable, recyclable materials circular economy.

Язык: Английский

Процитировано

49

Chitosan-Enhanced Vitrimerization of Thermoset Epoxy Resins: Multiple-Dynamic Networks for Sustainable Approaches, Improved Mechanical Properties, and Rapid Stress Relaxation DOI

M. Shadmand,

Farzad Alizadeh, Mir Karim Razavi Aghjeh

и другие.

ACS Applied Polymer Materials, Год журнала: 2025, Номер unknown

Опубликована: Янв. 9, 2025

This study explores the use of chitosan as a sustainable alternative in vitrimerization thermoset epoxy resins. Epoxy/chitosan vitrimer composites, with and without an external catalyst (zinc acetate), well epoxy/zinc acetate vitrimers reference samples, were successfully fabricated through mechanochemical ball-milling, followed by hot-pressing. Comprehensive multiscale analyses conducted, results compared existing literature. Incorporating significantly enhanced process, leading to remarkable improvements mechanical performance, solvent resistance, stress relaxation. Specifically, inclusion 15 wt % chitosan, catalyst, increased vitrimer's elastic modulus 100% tensile strength 35% virgin resin, while reducing relaxation time approximately 800 s, order magnitude lower than epoxy/cellulose reported Remarkably, presence zinc acetate, epoxy/chitosan composites further decreased 150 increasing 210% 80%, respectively, those resin. The reduction was attributed chitosan's primary amine hydroxyl groups, which facilitated multiple exchange reactions (transesterification, ester-to-amide, transamidation) acted self-catalysts for transesterification. Enhancements properties zinc-coordinated interactions within polymer networks. also investigates influence cross-linking density activation energy competitive parameters on behavior glass transition temperature (Tg) vitrimers. multiple-dynamic network rapid characteristics make them promising candidates variety applications, supporting circular economy. work represents first resins, advancing development recyclable materials.

Язык: Английский

Процитировано

1

Dynamic Cross-linked Poly(butylene adipate-co-terephthalate) for High-Performance Green Foam DOI

Zi-Yang Fan,

Ze-Zhi Shi,

Ling Ma

и другие.

ACS Sustainable Chemistry & Engineering, Год журнала: 2023, Номер 11(45), С. 16354 - 16364

Опубликована: Ноя. 1, 2023

The insufficient molecular weight of linear poly(butylene adipate-co-terephthalate) (PBAT) leads to poor foamability and mechanical performance foams, which seriously restricts the industrial application PBAT as foam materials. Herein, biobased itaconic anhydride was grafted onto backbone, then epoxidized soybean oil added obtain a dynamic cross-linked network based on Zn(II)-catalyzed transesterification. rheology results showed that storage modulus viscosity vitrimers increased obviously, exhibiting viscous liquid-like elastic solid-like transition behavior with increasing degrees. Reversible cleavage cross-links reformation integrated through rebonding bonds were observed under shears alternative large- low-amplitude oscillations, endowing fluidity elasticity during processing. exhibited strain-hardening in an extensional flow could be foamed by supercritical carbon dioxide foaming. lightweight show expansion ratio up 26.7-fold density 0.045 g/cm3. On coupling cell structure properties contributed network, foams enhanced elasticity, specific compressive strength, damping properties. strategy altering viscoelasticity simultaneously cross-linking provides new approach toward obtaining high-performance foams.

Язык: Английский

Процитировано

21

High-performance poly(thioctic acid)-based thermosets featuring upcycling ability for in situ foaming enabled by dual-dynamic networks DOI

Yaning Ma,

Zihan Zhao,

Zhiran Zheng

и другие.

Matter, Год журнала: 2024, Номер unknown

Опубликована: Сен. 1, 2024

Язык: Английский

Процитировано

7

Envisioning a BHET Economy: Adding Value to PET Waste DOI Creative Commons
Clarissa C. Westover, Timothy E. Long

Sustainable Chemistry, Год журнала: 2023, Номер 4(4), С. 363 - 393

Опубликована: Дек. 18, 2023

Poly(ethylene terephthalate), the fifth most produced polymer, generates significant waste annually. This increased production has spurred interest in chemical and mechanical pathways for recycling. The shift from laboratory settings to larger-scale implementation creates opportunities explore value recovery of recycling products. Derived glycolysis PET, bis(2-hydroxyethyl) terephthalate (BHET) exhibits versatility as a depolymerization product valuable monomer. BHET finds application across diverse industries such resins, coatings, foams, tissue scaffolds. Incorporating BHET, which is product, supports higher rates contributes more sustainable approach generating materials. review illuminates feedstock circular polymer materials economy.

Язык: Английский

Процитировано

14

Carbon Fiber-Reinforced Dynamic Covalent Polymer Networks Containing Acylsemicarbazide Bonds: Toward High-Performance Composites with Excellent Self-Healing and Upcycling Performance DOI

Yindong Wang,

Wenbo Ma,

Zhiwen Jian

и другие.

ACS Sustainable Chemistry & Engineering, Год журнала: 2023, Номер 11(34), С. 12562 - 12570

Опубликована: Авг. 15, 2023

Dynamic covalent polymer networks (DCPNs) with self-healing and recycling performance are highly relevant to sustainable development. Disposal of plastic wastes generated during DCPN reprocessing still faces serious challenges deserves be explored. Herein, high-performance polyacylsemicarbazide (PASC) DCPNs exhibiting excellent properties synthesized by the reaction sebacic dihydrazide isophorone diisocyanate hexamethylene trimer. Upcycling PASC waste after four-time is achieved adding epoxy monomers amine curing reagents, followed a thermal treatment. The optimized resin exhibits tensile strength 101 MPa, Young's modulus 2.73 GPa, elongation at break 8.67%, toughness 7.13 MJ·m–3, Tg 140 °C, Td 250 which overall surpass those original DCPNs, demonstrating upcycling performance. recycled from carbon fiber-reinforced can upcycled using same strategy. fiber re-employed prepare composites robust mechanical properties. Given low cost commercial availability monomers, successful not only reduces environmental pollution, but also enables possible industrialization contributes circular economy.

Язык: Английский

Процитировано

13

Closed-loop circular economy in ‘upcycled’ acrylonitrile–butadiene–styrene vitrimer DOI
Siddhesh Sadashiv Rege,

Indranil Dey,

Ria Sen Gupta

и другие.

European Polymer Journal, Год журнала: 2024, Номер 220, С. 113451 - 113451

Опубликована: Сен. 10, 2024

Язык: Английский

Процитировано

5

Tailoring dynamic mechanism of covalent adaptable polyurea networks by varying the category of isocyanates DOI

Fengbiao Chen,

Fei Gao,

Yifan Ge

и другие.

European Polymer Journal, Год журнала: 2024, Номер 207, С. 112826 - 112826

Опубликована: Фев. 6, 2024

Язык: Английский

Процитировано

4

Fabrication of recyclable and biodegradable PBAT vitrimer via construction of highly dynamic cross-linked network DOI

Jiawei Zheng,

Jiawei Lu,

Zhengxiang Yang

и другие.

Polymer Degradation and Stability, Год журнала: 2023, Номер 219, С. 110602 - 110602

Опубликована: Ноя. 25, 2023

Язык: Английский

Процитировано

11