Poly(N-isopropylacrylamide) hydrogels fabricated via click chemistry: well-defined α,ω-bis propargyl linear poly(N-isopropylacrylamide)s as crosslinkers
This work provides a facile method to regulate swelling properties and/or to impart special functions for click poly(N-isopropylacrylamide) (PNIPA) hydrogels, by adjusting the chain length of crosslinkers or by introducing other functional groups.
Photo-controlled Growth of Telechelic Polymers and End-linked Polymer Gels
作者:Huaxing Zhou、Jeremiah A. Johnson
DOI:10.1002/anie.201207966
日期:2013.2.18
norbornene–telechelic poly(NiPAAm) macromers. The macromers were end‐linked with a tris‐tetrazine via inverse‐electron‐demand Diels–Alder cycloaddition to generate polymergels. Addition of new monomer, followed by exposure to sunlight, led to “photo‐growth” of the network pores.
申请人:IOWA STATE UNIVERSITY RESEARCH FOUNDATION, INC.
公开号:US11072674B2
公开(公告)日:2021-07-27
The present invention relates to a method of preparing a multiblock copolymer. This method comprises i) providing a block copolymer comprising at least one PA block and at least one PB block, where PA represents a polymer block comprising one or more units of monomer A and PB represents a polymer block comprising one or more units of monomer B, with monomers A and B being the same or different, where the block copolymer contains a chain transfer agent moiety (CTA); ii) providing a radically polymerizable monomer C; and iii) polymerizing the block copolymer with monomer C under conditions effective to achieve a number average degree of polymerization (Nn) for the multiblock copolymer of up to 100,000 without gelation.
本发明涉及一种制备多嵌段共聚物的方法。该方法包括 i) 提供包含至少一个 PA 嵌段和至少一个 PB 嵌段的嵌段共聚物,其中 PA 代表包含一个或多个单体 A 单元的聚合物嵌段,PB 代表包含一个或多个单体 B 单元的聚合物嵌段,单体 A 和 B 可以相同或不同,嵌段共聚物包含链转移剂分子(CTA);ii) 提供可辐射聚合的单体 C;以及 iii) 在有效条件下,使嵌段共聚物与单体 C 聚合,以达到多嵌段共聚物的平均聚合度(Nn)达 100,000 而不发生凝胶化。
This invention describes the use of amphiphilic multiblock copolymers comprising a hydrophobic segment and a hydrophilic the amphiphilic multiblock copolymer has at least one thio carbonyl thio group capable of participating in a free radical reaction as comonomers in forming ophthalmic devices such as contact lenses, intraocular lenses, corneal implants, etc.
Biomedical devices
申请人:Linhardt Jeffrey G.
公开号:US20100317809A1
公开(公告)日:2010-12-16
Biomedical devices such as silicone hydrogels formed from a polymerization product of a mixture comprising (a) a siloxane-containing homopolymer comprising one or more thio carbonyl thio fragments of a reversible addition fragmentation chain transfer (RAFT) agent; and (b) one or more biomedical device-forming monomers are disclosed.