HIGH MOLECULAR WEIGHT ZWITTERION-CONTAINING POLYMERS
申请人:Oligasis
公开号:US20140024776A1
公开(公告)日:2014-01-23
The present invention provides multi-armed high MW polymers containing hydrophilic groups and one or more functional agents, and methods of preparing such polymers.
本发明提供了含有亲水基团和一种或多种功能剂的多臂高分子量聚合物,以及制备这种聚合物的方法。
Biomimetic Honeycomb-Structured Surfaces Formed from Block Copolymers Incorporating Acryloyl Phosphorylcholine
作者:Martina H. Stenzel、Thomas P. Davis
DOI:10.1071/ch03124
日期:——
casting blockcopolymers composed of polystyrene and poly(acryloyl phosphorylcholine), so that they mimicked a cell membrane. The size of the pores and regularity of the hexagonal array is strongly dependent on the block length. The blockcopolymers were prepared via RAFT (reversible addition fragmentation transfer) polymerization leading to well-defined products with a good control over block sizes
Polymers of one or more radical polymerizable monomers which polymer has pendant groups bearing a center of permanent positive charge and other pendant groups capable of stably binding the polymer to a surface are useful in the treatment of surfaces to render them biocompatible. The polymers may contain pendant groups which bind the polymer to a surface by physisorption, covalent bonding or ionic interactions. Additionally reactive groups in the polymer may serve as points for attachment of ligands to the polymer when coated on a surface.
A biocompatibilizing process in which the surface of a material in need of being biocompatibilized is coated with a copolymer formed by radical polymerization of ethylenically unsaturated monomers comprising a zwitterionic monomer having a sulphobetaine group and a comonomer having a group selected for providing a stable coating of polymer on the said surface. The comonomer may have a hydrophobic group for binding to oppositely charged ionic groups at the surface or a reactive group for forming a covalent bond with functional groups at the surface and/or for forming cross-links in the polymer coating.
Disclosed is a polymer blend composition and shaped article, and a process of blending and making shaped articles of polymer blends in which the biocompatibility of various polymers is improved by blending with them a polymer including a zwitterionic group. The zwitterionic group is usually an ammonium phosphate ester, preferably a choline, zwitterionic group and the polymer containing it may be produced by the free radical polymerization of ethylenically unsaturated monomers including a monomer bearing the zwitterionic group. Blending of the two polymers may be achieved by dry blending particulate polymers or by mixing the polymers in liquid dispersion or solution followed by removal of the liquid medium. The fibrinogen absorption and/or platelet activation of polymers may be reduced to a value of less than 80% or even less than 60% of the base polymer by introducing amounts of more than 10% or more than 30% of the zwitterionic group containing polymer.