功能性的可胶凝的三嵌段共聚物,聚(2-乙烯基吡啶) -嵌段-聚(3-(三乙氧基甲硅烷基)丙基甲基丙烯酸酯) -嵌段-聚苯乙烯(P2VP- b -PTEPM- b -PS),的制备是通过可逆加成的组合断裂链转移(RAFT)介导的自由基聚合和铜催化的点击化学。P2VP 310 - b -PTEPM 58 - b -PS 322的本体微相分离为了在不同条件下进行研究,以通过交联PTEPM相并将其分散在溶剂中的方法制备有机/无机纳米物体。条件包括使用不同的退火溶剂并添加硬脂酸以分别形成具有P2VP嵌段的超分子复合物。然后分别获得了具有分散在PS基质中的P2VP核和PTEPM壳的填充圆柱体,具有交替的PS,PTEPM和P2VP层的薄片以及具有分散于P2VP /硬脂酸复合物的基质中的PS核和PTEPM壳的逆圆柱形态仅来自相同的三嵌段共聚物样品。通过溶胶-凝胶法交联PTEPM微区并分散在溶剂中后,一系列有机/无机聚合物纳米物体
High density cationic polymer brushes from combined “click chemistry” and RAFT-mediated polymerization
作者:Serkan Demirci、Tuncer Caykara
DOI:10.1002/pola.26087
日期:2012.8.1
formation of well‐defined polymerbrushes, which subsequently resulted in the presence of free polymer chains in solution. The free polymer chains were isolated and used to estimate the molecular weights and polydispersity index of chains attached to the surface. In addition, by varying the polymerization time, we were able to obtain poly(VBTAC) brushes with grafting density up to 0.78 chains/nm2 with
NANOFILLED POLYMERIC NANOCOMPOSITES WITH TUNABLE INDEX OF REFRACTION
申请人:Tao Peng
公开号:US20120302700A1
公开(公告)日:2012-11-29
The present invention includes a method for preparing a nanoparticle filled nanocomposite material, the method including the steps of providing a plurality of nanoparticles. attaching a first layer of organic ligand to the nanoparticle via a phosphate or phosphonate linkage, covalently attaching a second layer of matrix compatible polymer to said first layer of organic ligand to produce modified nanoparticles, providing a polymer matrix and dispersing the modified nanoparticles in the polymer matrix, wherein the dispersement of the modified nanoparticles into the polymer matrix results in a nanocomposite material, and wherein the modified nanoparticles are modified such that the first layer is proximal to the nanoparticle and the second layer is distal to the nanoparticle. Also within the scope of the invention are modified nanoparticles, alternative nanocomposite materials and methods of making the same.
A well-defined block copolymer brush poly(glycidyl methacrylate)-graft-(poly(methyl methacrylate)-block- poly(oligo(ethylene glycol) methyl ether methacrylate)) (PGMA-g-(PMMA-b-POEGMA)) is synthesized via grafting from an approach based on a combination of clickchemistry and reversible addition-fragmentation chain transfer (RAFT) polymerization. The resulting block copolymer brushes were characterized
Straightforward access to biocompatible poly(2-oxazoline)-coated nanomaterials by polymerization-induced self-assembly
作者:Dao Le、Friederike Wagner、Masanari Takamiya、I-Lun Hsiao、Gabriela Gil Alvaradejo、Uwe Strähle、Carsten Weiss、Guillaume Delaittre
DOI:10.1039/c9cc00407f
日期:2019.3.26
We report the synthesis of poly(2-ethyl-2-oxazoline)-based (PEtOx) nanoobjects by polymerization-induced self-assembly (PISA). First, well-defined PEtOx macromolecular chain transfer agents were synthesized by cationic ring-opening polymerization and clickchemistry. The photoinitiated PISA of 2-hydroxypropyl methacrylate mediated by these PEtOx produced nanoobjects spanning the full range of core–shell
Efficient RAFT polymerization of N-(3-aminopropyl)methacrylamide hydrochloride using unprotected “clickable” chain transfer agents
作者:Patrícia V. Mendonça、Arménio C. Serra、Anatoliy V. Popov、Tamaz Guliashvili、Jorge F.J. Coelho
DOI:10.1016/j.reactfunctpolym.2014.04.001
日期:2014.8
The reversible addition fragmentation chain transfer (RAFT) of N-(3-aminopropyl)methacrylamide hydrochloride (APMA) using unprotected "clickable" chain transfer agents in water/dioxane mixtures is reported. The controlled character of the polymerization was confirmed by the linear increase of the polymer molecular weight with monomer conversion, the narrow molecular weight distribution (D < 1.1) and by chain extension experiments. The allcyne-terminated PAPMA was further functionalized by "click" chemistry with an azido-functionalized coumarin derivative. The method reported here will be useful for the preparation of novel PAPMA based materials for biomedical applications using a strategy that does not require challenging protection/deprotection steps. (C) 2014 Elsevier Ltd. All rights reserved.