scholarly journals High-performance pan-tactic polythioesters with intrinsic crystallinity and chemical recyclability

2020 ◽  
Vol 6 (34) ◽  
pp. eabc0495
Author(s):  
Changxia Shi ◽  
Michael L. McGraw ◽  
Zi-Chen Li ◽  
Luigi Cavallo ◽  
Laura Falivene ◽  
...  
Keyword(s):  
Thermal Stability ◽  
Mechanical Strength ◽  
High Performance ◽  
Rational Design ◽  
Design Strategy ◽  
High Thermal Stability ◽  
High Chemical ◽  
High Mechanical Strength ◽  
Performance Properties ◽  
Trade Offs

Three types of seemingly unyielding trade-offs have continued to challenge the rational design for circular polymers with both high chemical recyclability and high-performance properties: depolymerizability/performance, crystallinity/ductility, and stereo-disorder/crystallinity. Here, we introduce a monomer design strategy based on a bridged bicyclic thiolactone that produces stereo-disordered to perfectly stereo-ordered polythiolactones, all exhibiting high crystallinity and full chemical recyclability. These polythioesters defy aforementioned trade-offs by having an unusual set of desired properties, including intrinsic tacticity-independent crystallinity and chemical recyclability, tunable tacticities from stereo-disorder to perfect stereoregularity, as well as combined high-performance properties such as high thermal stability and crystallinity, and high mechanical strength, ductility, and toughness.

Synthesis and dielectric properties of polyarylene ether nitriles with high thermal stability and high mechanical strength

2011 ◽  
Vol 65 (17-18) ◽  
pp. 2758-2761 ◽  
Author(s):  
Hailong Tang ◽  
Jian Yang ◽  
Jiachun Zhong ◽  
Rui Zhao ◽  
Xiaobo Liu
Keyword(s):  
Thermal Stability ◽  
Dielectric Properties ◽  
Mechanical Strength ◽  
High Thermal Stability ◽  
High Mechanical Strength

Nacre-inspired composite films with high mechanical strength constructed from MXenes and wood-inspired hydrothermal cellulose-based nanofibers for high performance flexible supercapacitors

Nanoscale ◽  
2021 ◽  
Vol 13 (5) ◽  
pp. 3079-3091
Author(s):  
Libo Chang ◽  
Zhiyuan Peng ◽  
Tong Zhang ◽  
Chuying Yu ◽  
Wenbin Zhong
Keyword(s):  
Mechanical Strength ◽  
High Performance ◽  
Composite Films ◽  
High Mechanical Strength ◽  
Flexible Supercapacitor ◽  
Flexible Supercapacitors

Wood-inspired HCNF@Lig introduced into MXenes constructing a nacre-like material with high mechanical strength and excellent flexibility used as a flexible supercapacitor.

scholarly journals High-performance La-doped BCZT thin film capacitors on LaNiO3/Pt composite bottom electrodes with ultra-high efficiency and high thermal stability

2019 ◽  
Vol 45 (9) ◽  
pp. 11749-11755 ◽  
Author(s):  
Shangkai He ◽  
Biaolin Peng ◽  
Glenn J.T. Leighton ◽  
Christopher Shaw ◽  
Ningzhang Wang ◽  
...  
Keyword(s):  
Thin Film ◽  
Thermal Stability ◽  
High Performance ◽  
High Efficiency ◽  
High Thermal Stability ◽  
Thin Film Capacitors ◽  
La Doped

Indole-based high-performance polymeric materials with enhanced mechanical and thermal properties via cation-π interaction

2019 ◽  
Vol 32 (6) ◽  
pp. 662-668
Author(s):  
Xiao-fang Guan ◽  
Cong Liao ◽  
Li Yang ◽  
Guan-jun Chang
Keyword(s):  
Thermal Stability ◽  
Heat Resistance ◽  
Self Assembly ◽  
High Performance ◽  
Mechanical Performance ◽  
Polymeric Materials ◽  
Design Strategy ◽  
Mechanical And Thermal Properties ◽  
Innovative Design ◽  
High Performance Polymers

The preparation of high-performance polymeric materials with both excellent overall mechanical properties and heat resistance remains a considerable challenge. Inspired by the delicate self-assembly processes in nature, a facile strategy is reported for the preparation of high-performance polymeric materials with enhanced mechanical strength and improved thermal stability. In this instance, we successfully constructed a cation- π cross-linked polyimide (Na-poly(aryl indole) imide (Na-PINI)) film with enhanced mechanical performance and heat resistance (∼490°C). This work presents an innovative design strategy for realizing robust polymeric materials with integrated strength and thermal stability; the cation- π interaction is demonstrated to be a new method that may achieve many useful properties for high-performance polymers.

Water-Resistant Modification of Desulphurization Gypsum Block

2012 ◽  
Vol 182-183 ◽  
pp. 278-282
Author(s):  
Yan Mu ◽  
Ying Li Fu ◽  
Feng Qing Zhao
Keyword(s):  
Fly Ash ◽  
Mechanical Strength ◽  
High Performance ◽  
Water Resistance ◽  
Curing Temperature ◽  
Curing Time ◽  
Operating Property ◽  
High Mechanical Strength ◽  
Calcined Gypsum ◽  
Hemi Hydrate

A high performance water resistance agent KD-3 prepared from OPC cement, fly ash, slag and additives was used for the modification of hemi-hydrate desulphurization gypsum. Various factors on gypsum block were investigated. The prepared gypsum block possesses excellent water-resistance, good operating property and high mechanical strength. The optimized results was obtained: calcined gypsum 74.9%, KD-3 25%, retarder 0.1%, curing temperature 60°C and curing time 16h.

Flexible polyarylene ether nitrile containing pendant carboxyl groups/Eu(III) fluorescent films with high thermal stability and mechanical strength

2011 ◽  
Vol 65 (23-24) ◽  
pp. 3450-3453 ◽  
Author(s):  
Hailong Tang ◽  
Zhen Ma ◽  
Jian Yang ◽  
Jiachun Zhong ◽  
Rui Zhao ◽  
...  
Keyword(s):  
Thermal Stability ◽  
Mechanical Strength ◽  
High Thermal Stability ◽  
Carboxyl Groups ◽  
Polyarylene Ether Nitrile

TOUGHMET 2

Alloy Digest ◽  
2013 ◽  
Vol 62 (5) ◽  
Keyword(s):  
Heat Treatment ◽  
Thermal Stability ◽  
Fracture Toughness ◽  
Wear Resistance ◽  
High Performance ◽  
Mechanical Performance ◽  
High Thermal Stability ◽  
Lead Free ◽  
Plain Bearing ◽  
Ni Alloy

Abstract ToughMet 2 is a high performance, wrought, heat treatable, lead-free strip Cu-Ni alloy that imparts superior mechanical performance and high thermal stability to plain bearing applications. Parts are easily formed and they can be machined either before or after heat treatment. ToughMet alloys are a line of spinodal hardened Cu-Ni anti-galling alloys for bearings capable of performing with a variety of shafting materials and lubricants. The alloys combine a high lubricity with wear resistance in these severe loading conditions. This datasheet provides information on composition, physical properties, hardness, elasticity, and tensile properties as well as fracture toughness and fatigue. It also includes information on corrosion resistance as well as forming and machining. Filing Code: Cu-724. Producer or source: Materion Brush Performance Alloys. Originally published September 2004, revised May 2013.

scholarly journals Direct synthesis of highly stretchable ceramic nanofibrous aerogels via 3D reaction electrospinning

2021 ◽  
Author(s):  
Xiaota Cheng ◽  
Yang Si ◽  
Jianyong Yu ◽  
Bin Ding
Keyword(s):  
Thermal Stability ◽  
High Performance ◽  
Tensile Strain ◽  
Compressive Strain ◽  
Direct Synthesis ◽  
Extreme Environments ◽  
Three Dimensional ◽  
High Thermal Stability ◽  
High Porosity ◽  
Mechanical Performances

Abstract Ceramic aerogels are attractive for many applications due to their ultralow density, high porosity, and multifunctionalities but are limited by the typical trade-off relationship between mechanical properties and thermal stability when used in extreme environments. In this work, we designed and synthesized a unique ceramic nanofibrous aerogels with three-dimensional (3D) interwoven crimped-nanofibre structures that endow the aerogels with superior mechanical performances and high thermal stability. These ceramic aerogels were synthesized by a direct and facile route, 3D reaction electrospinning. They displayed robust structural stability with structure-derived mechanical ultra-stretchability up to 100% tensile strain and superior restoring capacity up to 40% tensile strain, 95% bending strain and 60% compressive strain, high thermal stability from -196 to 1400°C, repeatable stretchability at working temperatures up to 1300 ℃, and a low thermal conductivity of 0.0228 W m−1 K−1 in air. This work should enable the innovative design of high-performance ceramic aerogels for various applications.

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