Synthesis of Stereoregular Liquid-Crystalline Alicyclic Polyethers by Cationic Ring-Opening Polymerization.
نویسندگان
چکیده
منابع مشابه
High-density liquid-crystalline azobenzene polymer brush attained by surface-initiated ring-opening metathesis polymerization.
High-density polynorbornene azobenzene liquid-crystalline brushes are synthesized on quartz substrates by surface-initiated ring-opening metathesis polymerization (SI-ROMP) using Grubbs third-generation catalyst. The grafting process is controlled over the thickness of the brush from a solid-supported substrate in a stoichiometric manner. A highly ordered liquid-crystal arrangement was formed f...
متن کاملStereoregular Isotactic Poly(mandelic acid) via Organocatalytic Ring-Opening Polymerization of a Cyclic O-carboxyanhydride**
Poly(mandelic acid), PMA, is an aryl analogue of poly(lactic acid), PLA, and a biodegradable analogue of polystyrene. Preparation of stereoregular PMA is reported for the first time in this work using a pyridine-mandelic acid adduct (Py·MA) as an organocatalyst for the ring-opening polymerisation (ROP) of the cyclic O-carboxyanhydride, manOCA. Polymers with narrow polydispersity index and excel...
متن کاملOrganocatalytic ring-opening polymerization.
Modern synthetic methods have revolutionized polymer chemistry through the development of new and powerful strategies for the controlled synthesis of complex polymer architectures.1-5 Many of these developments were spawned by new classes of transition metal catalysts for the synthesis of new polyolefin microstructures,5 the design of highly efficient families of “living” polymerization strateg...
متن کاملThermodynamics and Kinetics of Ring - Opening Polymerization
Cyclic monomers that have been polymerized via ring opening encompass a variety of structures, such as alkanes, alkenes, compounds containing heteroatoms in the ring: oxygen [ethers, acetals, esters (lactones, lactides, and carbonates), and anhydrides], sulfur (polysulfur, sulfi des and polysulfi des), nitrogen [amines, amides (lactames), imides, N carboxyanhydrides and 1,3 oxaza derivatives], ...
متن کاملذخیره در منابع من
با ذخیره ی این منبع در منابع من، دسترسی به آن را برای استفاده های بعدی آسان تر کنید
ژورنال
عنوان ژورنال: KOBUNSHI RONBUNSHU
سال: 1999
ISSN: 0386-2186,1881-5685
DOI: 10.1295/koron.56.378