Abstract:
A method of preparing high molecular weight poly(meth)acrylate polymers having narrow polydispersity indices (PDIs) by coupling poly(meth)acrylate building block units which themselves have narrow PDIs. The building block units have halogenated terminations, which when reacted with selected coupling agents, from the high molecular weight poly(meth)acrylate polymers.
Abstract:
Shape memory polymers featuring reversible actuation capability under ambient stimulus for integration with apparel. One approach is to use a multiblock polymer consisting of two (or potentially more) blocks in which the one block is the crystalline switching block with relatively low melting transitions, the other block has a higher thermal transition, and the two blocks are linked together by a linker molecule. Another approach is to use a graft copolymer having high and low melting transitions where the graft copolymer has a first polymer serving as the backbone and a second polymer being grafted to or from the backbone at certain graft locations. A further approach is to use latent crosslinking of a semicrystalline polymer with reactive groups placed on the backbone. Finally, these polymers may be formed as actuators that undergo curling, twisting and even volumetric expansion.
Abstract:
Die Erfindung betrifft schlagzähmodifizierte bioabbaubare Polymere, insbesondere schlagzähmodifizierte Polymilchsäure, diese enthaltende Formkörper und deren Verwendung. Die Polymermischung enthält 85 bis 98,9 Gew.-% mindestens eines bioabbaubaren Polymers; 1 bis 5 Gew.-% mindestens eines Copolymers b) mit Kern-Schale-Struktur, und 0,1 bis Gew.-% mindestens eines linearen A-B-A-Triblockcopolymeren aus harten Polymerblöcken A und einemweichen Polymerblock B, insbesondere einem Methylmethac-10 rylat/Glycidylmethacrylat-Copolymer- block -polybutylacrylat- block -Methylmethacrylat/ Glycidyl- methacrylat-Copolymer.
Abstract:
The present invention relates to star polymer having a core made up of a crosslinked network of polymers derived from a mixture of one or more multi-functional monomers and one or more mono-functional monomers and where the star polymer has arms made of polymers derived from a mixture of one or more mono-functional monomers, where the star contains at least three arms bonded to the core. The invention further relates to lubricating compositions containing an oil of lubricating viscosity and the described star polymers as well as methods of lubricating a mechanical device with the described lubricating compositions.