Reversible Transformations of Polymer Topologies through Visible Light and Darkness
作者:Evelina Liarou、Hannes A. Houck、Filip E. Du Prez
DOI:10.1021/jacs.2c01622
日期:2022.4.20
external stimuli. The shape transformations have been repeated up to 4 times sequentially in one pot without the need of any purification. The topological alterations are microscopically depicted throughreversible self-assembly, with the polymers adopting different morphologies upon visible light or darkness. The versatile yet practical nature of this polymer “reshaping” strategy provides facile access
申请人:The Malaysian Rubber Producers' Research Association
公开号:US04501860A1
公开(公告)日:1985-02-26
A hydroxyl-functional polymer is reacted with a compound ZCO.N(H).sub.x.N(H).sub.x.CO.OR, where Z is halogen or aryloxy, x is 0 or 1 and R is hydrocarbon, and the reaction product is if necessary oxidized to give an azodicarboxylate functional polymer having the formula QOCO.N:N.CO.OR where Q is an inert polymer group. This polymer is used to react with ethylenically unsaturated natural or synthetic rubber so as to graft groups derived from the polymer on the rubber backbone.
High molecular weight multifunctional fluorescent polyurea: Isocyanate-free fast synthesis, coating applications and photoluminescence studies
作者:Sulbha Kumari、Mohd Avais、Subrata Chattopadhyay
DOI:10.1016/j.polymer.2022.125219
日期:2022.9
the use of any additives and catalysts, which is a remarkable advantage in comparison to all other reported methods in the literature. The molecularweight (M) of the polyurea can be defined as either very highmolecularweight >150,000 g/mol or low molecularweight ∼ 3500–4000 g/mol via choosing a suitable solvent for the polymerization reaction. This approach is also useful for polyurea-based hydrophobic
Neue substituierte 4,5-Diamino-1,2-4-Triazol-3-(thi)one der allgemeinen Formel (I)
mehrere Verfahren und neue Zwischenprodukte zu ihrer Herstellung und ihre Verwendung als Herbizide.