Results 241 to 250 of about 126,507 (309)

Starch-based isocyanate- and non-isocyanate polyurethane hybrids: A review on synthesis, performance and biodegradation.

Carbohydrate Polymers, 2021
The challenges related to the persistence of plastics in natural ecosystems fostered strong interest in developing biodegradable bioplastics. Among natural biopolymers, starch gained both academic and industrial interest owing to its impressive ...
N. Tai, M. Ghasemlou, R. Adhikari, Benu Adhikari   +3 more
semanticscholar   +1 more source

Nitropyridyl isocyanates

Journal of Heterocyclic Chemistry, 2005
AbstractFor Abstract see ChemInform Abstract in Full Text.
Jarle Holt, Trygve Andreassen, Jan M. Bakke, Anne Fiksdahl   +3 more
openaire   +1 more source

WORKERS' EXPOSURE TO ISOCYANATES

American Industrial Hygiene Association Journal, 1992
A model of exposure to isocyanates, based on knowledge of industrial processes and starting materials and the results of industrial hygiene surveys, is proposed. This model of exposure suggests the concentration and physical form of airborne isocyanate monomers and oligomers.
J, Lesage, N, Goyer, F, Desjardins, J Y, Vincent, G, Perrault   +4 more
openaire   +2 more sources

Synthesis of starch-based polyether non-isocyanate polyurethane with excellent mechanical and foaming properties.

International Journal of Biological Macromolecules
Non-isocyanate polyurethane (NIPU) represents a novel class of polymers synthesized via an environmentally friendly process without toxic phosgene and isocyanates.
Bin Chen, Chen-Xi Wang, Longfei Zhang, Cheng-Qian Wang   +3 more
semanticscholar   +1 more source

Cross-linked polyurethane with dynamic phenol-carbamate bonds: properties affected by the chemical structure of isocyanate

Polymer Chemistry, 2021
Based on the phenol–carbamate dynamic bond, we designed a strategy to regulate the rearrangement kinetics of the dynamic covalent network in polyurethanes by adjusting the chemical structure of aliphatic isocyanates.
Jia-Xin Shi, Tianze Zheng, Y. Zhang, Bao-Hua Guo, Jun Xu   +4 more
semanticscholar   +1 more source

Phosphorus Isocyanates

Angewandte Chemie International Edition in English, 1969
AbstractCompounds containing the PNCO grouping can be obtained e.g. from phosphorus halides and silver cyanate or esters of N‐chloroiminocarbonic acid and by thermal decomposition of alkoxycarbonylimino‐phosphoranes. The phosphorus (V) isocyanates resemble the “carbon” isocyanates in their chemical properties, whereas the phosphorus (III) isocyanates ...
openaire   +2 more sources

Synthesis of green hybrid materials using starch and non-isocyanate polyurethanes.

Carbohydrate Polymers, 2020
Green and environment-friendly polymers with comparable thermal and mechanical performance can be suitable alternatives of synthetic polymers. This paper documents the synthesis of crystallizable polyhydroxyurethanes (PHUs) through a facile, non ...
M. Ghasemlou, F. Daver, E. Ivanova, Benu Adhikari   +3 more
semanticscholar   +1 more source

Bio-based healable non-isocyanate polyurethanes driven by the cooperation of disulfide and hydrogen bonds

Polymer Chemistry, 2020
Novel bio-based non-isocyanate polyurethanes with tunable mechanical and self-healing properties are successfully synthesized.
Jincheng Dong, Bin-Yuan Liu, Huining Ding, Junbin Shi, Ning Liu, B. Dai, Il-Joong Kim   +6 more
semanticscholar   +1 more source

Synthesis of non-isocyanate polyurethanes and their application in radiation-curable aerospace coatings

, 2020
Although the current polyurethane coatings used in the aerospace applications meet the stringent performance requirements, they don’t comply with the environmental demands, e.g., low VOC contents.
F. Zareanshahraki, H. Asemani, J. Skuza, V. Mannari   +3 more
semanticscholar   +1 more source

Sulfonylmethyl isocyanates, a new class of isocyanates

Recueil des Travaux Chimiques des Pays-Bas, 1966
AbstractFive alkyl‐ and aryl‐sulfonylmethyl isocyanates have been ...
J. Strating, H. O. van Oven, A. M. van Leusen   +2 more
openaire   +1 more source