Results 51 to 60 of about 318,803 (303)

Effect of different catalysts on recovery and reuse of waste polyurethane rigid foam

Materials Research Express, 2021
The sharp increase of waste polyurethane rigid foam has caused great harm to the natural environment. Ethylene glycol (EG) and propylene glycol (PG) was the alcoholysis agents, and KOH and Zn _3 [Co(CN) _6 ] _2 (DMC) were used as catalysts for ...
Xiaohua Gu, Shiwei Lyu, Weidong Cheng, Siwen Liu   +3 more
doaj   +1 more source

Recent research progress of polyurethane for gas barrier application

Journal of Aeronautical Materials, 2023
Polyurethane is a unique polymer with excellent flexibility, elasticity, controllable hardness, fine tensile strength, abrasion and medium resistant, and stable in both low and high temperature.
GUAN Zhenwei, ZHANG Liguo, WANG Zhiyong, HE Hui   +3 more
doaj   +1 more source

Shape Memory Polyurethane-Based Smart Polymer Substrates for Physiologically Responsive, Dynamic Pressure (Re)Distribution. [PDF]

, 2019
Shape memory polymers (SMPs) are an exciting class of stimuli-responsive smart materials that demonstrate reactive and reversible changes in mechanical property, usually by switching between different states due to external stimuli.
Kumar, Bipin, Narayana, Harishkumar, Noor, Nuruzzaman, Pan, Ning, Shah, Parth, Thakur, Suman, Wang, Faming, Yan, Siu-Cheong   +7 more
core   +3 more sources

Self‐Powered Permeable Electronic Dressing for Exudate Management, Electrostimulation and Drug Delivery in Chronic Wound Healing

Advanced Functional Materials, EarlyView.
This study develops a self‐powered permeable electronic dressing (SPED) that synergistically integrates exudate management, electrical stimulation, and on‐demand drug delivery. The dressing effectively absorbs exudate while demonstrating potent antibacterial activity and accelerated tissue regeneration in diabetic mouse models, thereby promoting ...
Jiaheng Liang, Jingjing Fu, Jin Chai, Hongyu Jiang, Fan Chen, Yufei Zhang, Weihao Zhao, Xian Song, Zhihao Zhou, Lingtao Fang, Qiyao Huang, Peng Li, Zijian Zheng   +12 more
wiley   +1 more source

Study on the Properties of Silicon-Modified Polyurethane Anticorrosion Coating

Chemical Engineering Transactions, 2017
Polyurethane anticorrosion coating has been widely used as a metal coating material in recent years, but it has some shortcomings in hydrophobicity, heat resistance and hardness.
Liqin Yang, Huarong Yan, Dongfeng Li, Yinfeng Li, Zhiju Zhao   +4 more
doaj   +1 more source

Flame retardant spandex type polyurethanes [PDF]

, 1978
Flame retardant elastomeric compositions were developed, comprised of: (1) spandex type polyurethane having incorporated into the polymer chain, halogen containing polyols; (2) conventional spandex type polyurethanes in physical admixture flame retardant
Howarth, J. T., Massucco, A. A., Sheth, S., Sidman, K. R.   +3 more
core   +1 more source

Actuating and Sensing Composites of Liquid Crystal Elastomers and Poly(ionic liquid)s

Advanced Functional Materials, EarlyView.
Ionic conductive, mechanically tough, flexible, and stretchable filaments of a composite material comprising a liquid crystal elastomer and a poly(ionic liquid) are produced through 3D printing, which exhibit large actuation strain under stimulation and electrical resistance variation in response to deformation or environmental condition changes. Their
Zeping Liu, Xiaofeng Zheng, Shaoxia Zhang, Long Xu, Meng Liu, Jeremy Baribeault St‐Germain, Yue Zhao   +6 more
wiley   +1 more source

Analysis on Mechanical Characteristics of the Polyurethane Base Plate for Ballastless Track of High Speed Railway

Chemical Engineering Transactions, 2017
In this paper, test method is used in giving tensile strength test, elongation at break test, permanent compressive deformation, oil resistance test and dynamic and static stiffness test to the aging and non-aging polyurethane base plates, and it is used
Wenshuai Chen
doaj   +3 more sources

Bio-based polyurethane for road engineering applications: A comprehensive review

Journal of Road Engineering
With the escalating global emphasis on environmental conservation and sustainable development, enhancing the service quality and durability of road surfaces and facilitating the green development of highways have commanded considerable attention.
Qingxu Li, Zengping Zhang, Zhongbao Shi, Yekun Zhang, Xiaoyi Ban, Hao Liu   +5 more
doaj   +1 more source

Synthesis of various highly halogenated monomers and polymers [PDF]

, 1967
Halogenated polyurethane and polycarbonate are synthesized and found to be LOX compatible but dependent upon the type nitrogen ...
Hollander, J., Trischler, F. D.
core   +1 more source