Knowledge base

Dendrimers and hyperbranched polymers have received considerable attention during the recentyears. Theoretically the concept of highly branched polymers was initially proposed in the early1940's by Flory and Stockmayer, but ittook until 1980 -1990 before the first synthesis ofdendrimers was presented by the research groups of Tomalia, Vogtle, Webst

Because of the wide array of industrial and scientific applications for crosslinked polymers formedby photopolymenzation, understanding of the kinetics of multifunctional monomers and resulting material properties is essential. Primary cyclization, i.e., when a pendant double bond reacts with a radical on the same chain, causes microgels and hetero

The intention of this paper is to discuss in some detail factors which determine camphorquinone (CQ)Iamine (AMH) photoinitiated polymerization. Emphasis is placed on the rate and course of radical reactions. CO can photoinitiate polymerization itself, however, at low speed and poor efficiency. In order to accelerate the photopolymerization, amines

An industrial tolylcumyliodonium- tetrakis pentafluorophenylborate , commercially namedRhodorsil ® Photoinitiator 2074 , was developed by Rhodia 1] The objective was to give analternative to solventless release silicone coatings . .J.CRIVELLO and other company 2] hadalready introduced cationic commercial systems in the mid-eighties.Cationic polymer

With this background paper, the Federal Environmental Agency offers a comprehensive introductionto and overview of the chemical processes behind the occurrence of summer smog, the effects ofozone on human health and the environment, as well as the measures which are, in the view of theFederal Environmental Agency, necessary to combat summer smog.

             Over the past decade, UV-radiation curing has found an increasing number of industrial applications because of its unique advantages, mainly solvent-free formulations, high cure speed and ambient temperature processing. One of the important fields where UV-curing has been

UV curable powder coatings is perhaps one of the most challenging developments in radiationcuring today. The desire to be able to apply powder coatings on heat sensitive substrates hastriggered extensive research during the last decade.One of the main advantages with powder coatings is that they are zero-VOC systems, i.e. theycontain no solvents, w

The hardening of coatings by high-energy radiation is still a relatively new technology. The use ofultra-violet radiation in particular only really started to gain acceptance in the 1 980s following thedevelopment of suitable binders, initiators and cunng equipment, and has been growing at an aboveaverage rate ever since. By curing in an inert atmo