منابع مشابه
Acrylonitrile Block and Graft Copolymers
This paper presents a review of the methods available for preparing block and graft copolymers in which one component is acrylonitrile. Methods using polymer ions and polymer radicals are considered together with a useful new technique based on reactions of nitrile groups with amide compounds of group IV transition metals. Because of its polarity and its unusual solubility properties, a polyacr...
متن کاملGraft Polymerization of Acrylonitrile onto Wheat Straw
Acrylonitrile was graft polymerized onto ground, water-washed wheat straw using Fe2 +-H 20 2 as initiator. Reaction conditions were selected to minimize homopolymer formation and ma.xi.mize the amount of polyacrylonitrile (PAN) grafted to straw. Polymerizations typically yielded straw-g-PAN containing 30-35% PAN. A two-step fractionation scheme was developed for determining the relative amounts...
متن کاملSupramolecular Conjugated Block Copolymers
While the performance of polymer−polymer bulk heterojunction organic photovoltaics (OPVs) is poor compared with polymer−fullerene OPVs, reducing or eliminating micrometer-scale phase separation in all-polymer OPVs may dramatically improve performance. Herein, we demonstrate that 2-ureido-4[1H]-pyrimidinone (UPy) quadruple hydrogen bonding interactions can be used to prevent micrometer-scale pha...
متن کاملMicellization of block copolymers
This article deals with recent progress including the author’s work in the field of block copolymer self-assembly in solution and on solid surfaces. The synthesis methods for producing block copolymers with well-defined structures, molecular weights and composition are outlined with emphasis on ionic and controlled free radical polymerization techniques. A general overview of the preparation, c...
متن کاملSelf-Assembling of Thermally Responsive Block and Graft Copolymers in Aqueous Solutions
Various thermally responsive block and graft copolymers based on poly(Nisopropylacrylamide) (PNIPA) have been synthesised. Poly(ethyleneoxides) (PEO) with different chain lengths were used as hydrophilic blocks and grafts. The graft copolymers were synthesised in two steps. Firstly, two functional copolymers were prepared by free radical polymerisation of N-isopropylacrylamide (NIPA) with eithe...
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ژورنال
عنوان ژورنال: Pure and Applied Chemistry
سال: 1976
ISSN: 1365-3075,0033-4545
DOI: 10.1351/pac197646010045