Hyperbranched Polyethylene Ionomers Containing Cationic Tetralkylammonium Ions Synthesized by Pd–Diimine-Catalyzed Direct Ethylene Copolymerization with Ionic Liquid Comonomers
摘要:
Synthesis of polyolefin-based ionomers through direct catalytic copolymerization of olefin with ionic comonomers has been challenging with no prior reports. We demonstrate in this article the first direct synthesis of a class of hyperbranched polyethylene ionomers containing positively charged tetralkylammonium ions and different counteranions (tetrafluoroborate, hexafluorophosphate, bis-(trifluoromethane)sulfonimide, or hexafluoroantimonate) by copolymerization of ethylene with tetralkylammonium-containing acrylate-type ionic liquid comonomers (3-5, 7). The use of a Pd-diimine catalyst (1), which shows excellent stability toward the highly polar ionic group, is key to the direct synthesis. A detailed study on the catalytic copolymerization and the effects of the polymerization condition on the macromolecular chain parameters of the resulting ionomers has been performed. A range of ionomers differing in ion content and counteranion has been synthesized and characterized. Meanwhile, systematic studies on the structural, thermal, and melt rheological properties of the ionomers have been undertaken. The dramatic effects of ion incorporation on these properties, particularly on the rheological properties, are demonstrated.
METHOD FOR PREPARING A BIOCIDAL, BACTERIOCIDAL AND/OR BACTERIOSTATIC MATERIAL
申请人:COMMISSARIAT À L'ÉNERGIE ATOMIQUE ET AUX ÉNERGIES ALTERNATIVES (CEA)
公开号:US20220053766A1
公开(公告)日:2022-02-24
A process for preparing a biocidal, bactericidal and/or bacteriostatic material including the preparation of a polymer precursor solution that has (a) at least one monomer A having a porphyrin group and at least one radical polymerizable function, (b) at least one radical polymerizable monomer B, a photoinitiator, and (c) at least one of the monomers chosen from a monomer C having a quaternary amine and a radical polymerizable function; and/or a monomer D having copper and a radical polymerizable function. Also, the material obtainable by the process and its uses.
Ionic hydrogels with controlled aqueous fluid absorption
申请人:Munro Semple Hugh
公开号:US20060068014A1
公开(公告)日:2006-03-30
A cross-linked plasticised polymeric hydrogel suitable for use in mammalian body tissue (e.g. skin) contacting applications, which comprises a cross-linked copolymer formed from a first monomer comprising one or more pendant anionic group and a second monomer comprising one or more pendant cationic group, the relative amounts of the said monomers in the copolymer being such that the anionic groups and cationic groups are present in essentially equimolar quantities.
Thiol–ene grafting from polylactic acid, polycaprolactone, and polyhydroxybutyrate
作者:Kedafi Belkhir、Corinne Jegat、Mohamed Taha
DOI:10.1016/j.reactfunctpolym.2016.02.009
日期:2016.4
their biological activities; and also methyl methacrylate (MMA) and hydroxyethyl methacrylate (HEMA), which are used to control the hydrophilic–hydrophobic balance in the issued copolymers. Monomer conversion and the resulting polymer structures are confirmed principally by 1 H nuclear magneticresonance (NMR) spectra. Model reactions are first conducted with thiophenol, and then polylactic acid (PLA),
摘要本研究分析了多硫醇官能化的可生物降解聚合物中不同单体的硫醇-烯加成。这些单体包括以其生物活性而著称的季铵基团。以及甲基丙烯酸甲酯(MMA)和甲基丙烯酸羟乙酯(HEMA),它们用于控制已发行共聚物中的亲水性-疏水性平衡。单体转化和所得的聚合物结构主要由1 H核磁共振(NMR)光谱确认。首先用硫酚进行模型反应,然后成功使用聚乳酸(PLA),聚己内酯(PCL)和聚羟基丁酸酯(PHB)多硫醇官能化聚合物。所得产物的结构通过1 H NMR光谱分析:所有反应都是动力学控制的,单体添加是可控制的。所用单体到多硫醇官能化的PLA的链转移常数在1.4至1.9之间。所获得的产物还通过尺寸排阻色谱法(SEC),差示扫描量热法(DSC)和热重分析(TGA)来表征。
[EN] SILICATES AND OTHER OXIDES WITH BONDED ANTIMICROBIAL POLYMERS<br/>[FR] SILICATES ET AUTRES OXYDES LIES A DES POLYMERES ANTIMICROBIENS
申请人:QUICK MED TECHNOLOGIES INC
公开号:WO2005084436A1
公开(公告)日:2005-09-15
This invention relates to methods and compositions for materials having a non-leaching or slow-realising coating that has antimicrobial properties. The coating is applied to substrates such as silicates, iron oxides, titanium dioxide, pigments, powders and other substrates. Covalent bonds or ionic bonds are formed between the substrate and the polymer molecules that form the coating.
[EN] PARTICLES FOR ELECTROPHORETIC DISPLAYS<br/>[FR] PARTICULES POUR ÉCRANS D'AFFICHAGE ÉLECTROPHORÉTIQUES
申请人:MERCK PATENT GMBH
公开号:WO2012019704A1
公开(公告)日:2012-02-16
This invention relates to coloured polymer particles preferably with surface functionality for charge retention, a process for their preparation, the use of these particles for the preparation of an electrophoretic device, colour electrophoretic displays comprising such particle, and new polymerisable dyes.