Results 121 to 130 of about 69,264 (169)
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Biodegradable block copolymers
Advanced Drug Delivery Reviews, 2001Recently, block copolymers have got tremendous impetus on the ongoing research in the area of drug delivery technology, due to their capability to provide a biomaterial having a broad range of amphiphilic characteristics, as well as targeting the drugs to specific site.
N, Kumar, M N, Ravikumar, A J, Domb
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The Synthesis of Liquid Crystalline Copolymers with Block Copolymer Grafts
Macromolecular Chemistry and Physics, 2001The synthesis of novel copolymers consisting of a side-group liquid crystalline backbone and poly(tetrahydrofuran)-poly(methyl methacrylate) block copolymer grafts was realized by using cationic-to-free-radical transformation reactions. Firstly, photoactive poly(tetrahydrofuran) macroinimers were prepared by cationic polymerization of tetrahydrofuran ...
Y. Hepuzer +4 more
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Graft Copolymer and Block Copolymer Surfaces
1985Homopolymers and random copolymers are relatively homogeneous in composition throughout their bulk. At the outermost molecular layer of such materials, the surface chemistry might differ substantially from the average bulk chemistry due to orientation effects, oxidation, or contamination.
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Photoexcitations in Conjugated Copolymers
Molecular Crystals and Liquid Crystals Science and Technology. Section A. Molecular Crystals and Liquid Crystals, 1994We report in this short paper a preliminary account on the optical characterization and photoexcitation of a class of novel conjugated polymers consisting of regularly alternating thiophene and benzene sequences, which might represent models for one-dimensional superlattices. Optical absorption and emission spectra suggest that the barriers produced by
Chiara Botta +3 more
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Polyhydroxyalkanoates based copolymers
International Journal of Biological Macromolecules, 2019Polyhydroxyalkanoates (PHAs) belong to a family of natural polyesters and are produced under unbalanced growth conditions as intracellular carbon and energy reserves by a wide variety of microorganisms. Being biodegradable, biocompatible and environmental friendly thermoplastics, the PHAs are considered as future polymers to replace petrochemicals ...
Asit Baran, Samui, Tapan, Kanai
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Current Opinion in Solid State and Materials Science, 1999
The efficient synthesis of structurally well-defined block copolymers is exciting and important area of research. This article describes several methods for the preparation of di- and triblock copolymers. Examples are taken from the literature and include anionic, cationic, free-radical and metal-catalyzed polymerizations that are useful for the ...
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The efficient synthesis of structurally well-defined block copolymers is exciting and important area of research. This article describes several methods for the preparation of di- and triblock copolymers. Examples are taken from the literature and include anionic, cationic, free-radical and metal-catalyzed polymerizations that are useful for the ...
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Mass Spectrometry Reviews, 2002
Abstract I. Introduction 108 II. Structural Analysis 109 III. Copolymer Composition 111 A. Composition by the Direct Method 111 B. Composition by the Method Based on Statistics 111 C. Copolymer Composition by the Hard‐Ionization Method 113 IV. Copolymer Sequence 114 V. Molar Mass Determination 115 VI.
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Abstract I. Introduction 108 II. Structural Analysis 109 III. Copolymer Composition 111 A. Composition by the Direct Method 111 B. Composition by the Method Based on Statistics 111 C. Copolymer Composition by the Hard‐Ionization Method 113 IV. Copolymer Sequence 114 V. Molar Mass Determination 115 VI.
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Homopolymer-Copolymer and Copolymer-Copolymer Blends
2020Yuri S. Lipatov, Anatoly E. Nesterov
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