Topic
Condensation polymer
About: Condensation polymer is a research topic. Over the lifetime, 10284 publications have been published within this topic receiving 185497 citations. The topic is also known as: condensation polymerization & step-growth polymerization.
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01 Jan 1984
TL;DR: Muggins et al. as discussed by the authors presented the Division of polymer chemistry award to Maurice L Muggins for the Structures of Collagen and discussed the effects of exposure of blood coagulation factors and platelets to synthetic polymers.
Abstract: Ceremony for the Presentation of the Division of Polymer Chemistry Award to Maurice L Muggins- The Structures of Collagen- Panel Discussion with Dr Muggins- Head to Mead Polymers- Polycondensation Reactions in the Presence of Polymer Matrices- Telechelic Polyethylene- Soluble Ladder Type of Poly(silesquioxanes) Maving Functional Groups- New Phosphorus-Containing Bisimide Resins- Crosslinking of Gelatin by Reactive Polymers Effect of Polymer Structure on Gelation Time- Study of Dextran-Methyl Methacrylate Graft Copolymer- The Kinetics and Mechanisms of the Dehydrohalogenation of the Poly(vinyl halides), PVC, PVDC and PVF- 1H NMR Studies on Conformation of Poly(vinylidene Fluoride) in Solution and Its Relation with Crystal Modification- Syntheses of Polymeric Azo Dyes of Pyrazolone Series- New Oligomeric Flame Retardants Containing s-Triazine Ring- Functional Effects of Exposure of Blood Coagulation Factors and Platelets to Synthetic Polymers- Analysis of Dielectric ?-Relaxation in Poly(methyl Acrylate) and Poly(t-butyl Acrylate)- Effects of Poisson's Ratio and Electrostriction Constant on Piezoelectricity in Poly(vinylidene Fluoride)- Influence of Shearing Histories on the Rheological Properties and Processability of Branched Polymers- Effects of Molecular Weight on the Aggregation of Poly(?-benzyl L-Glutamate in Dilute Solution- The Conformational Order in Hexadecane Solutions and Polyethylene- Entanglement Networks of 1,2-Polybutadiene Cross-linked in States of Strain: XV Simple Extension Special Case Comparison of the CKF Theory to Swelling Equilibrium Data- Electrophilic Olefins Containing Anionic Leaving Groups as New Cationic Initiators- Synthesis and Properties of Some Polymers Related to Biological Functions: Metal Transport and Template-directed Oligonucleotide Synthesis- Copolymerization of Carbon Dioxide and Epoxide and Related Reactions- Interactions Between Blood and Foreign Surfaces of Synthetic Polymers-Especially in Vascular Prothesis- Anionic Polymerization of p-Styrenyl Substituted Derivatives of Silicon, Germanium and Tin- Rare Earth Metal Containing Polymers: Energy Transfer Uranyl to Europium Ions in lonomers- Extration of Uranium from Sea Water by Synthetic Polymer Adsorbent- Selective Synthesis of Macrocyclic Oligoesters from a Bicyclic Oxalactone and Cation Transport through their Organic Liquid Membranes- The Efficiency of Glow Discharge Polymerization in Tubular Reactors- Interpolymer Association of Exciplex Forming Polymers under Extremely Dilute Conditions- Surface Modification of Aromatic Polyamides by Microwave Plasma Treatment- Modification of Polymer Surfaces by Surface Active Graftcopolymers- The Triplet State of Polymers with Pendent Aromatic Chromophores- Radiation-Induced Ionic Polymerization- Hydration of Poly(ethylenimine) Structures of Sesquihydrate (-Ch2Ch2Nh--l5H20)n and Dihydrate (-Ch2Ch2NH--2H20)n- Quantum Chemistry of Gauche-Oxygen Effect Observed in Polyethers- Transients in the Structure and Stress of Entangled Polymers Subjected to Step Changes in Shear Rate- New Emulsion System - Polymeric "Water in Water" Emulsion- Peel Behavior of Pressure-Sensitive Adhesives- Modeling the Viscoelastic Behavior of SBS Block Copolymer Solids- Physical Aging and Its Long-term Effect on the Durability and Reliability of Advanced Structural Epoxies and Epoxy-based Graphite-fiber Composites- On the Effect of Thermal Stability of Electron Donor, AIR3 Complex for the Property of High Active Supported Catalyst for PP- Membrane Separation and Its Industrial Applications- Structure and Properties of Polypeptide Block Copolymer Membranes- Structure and Properties of Poly(amino Acid) Solids- Specific Multi-layer Structure Polymer Composition- Strong Piezoelectric Activity in Simultaneously Streched and Poled Poly(vinylidene Flouride)- Vinylidene Fluoride-Hexafluoropropylene Copolymer Having Terminal Iodines- Hydrophilic Polyamide Membrane Prepared from Optically Active Bicyclic Oxalactam- Interfacial Tension of Demixed Polymer Solutions near Critical Solution Temperature- Fourier Transform-Infrared Studies of Polymer Blends: IV Poly(?-caprolactone)-Poly(Bis-phenol A-Carbonate) System- Crystal-Liquid Crystal Phase Transformation of Synthetic Bimolecular Membranes- Non-Equilibrium Processes in Stressed Polymeric Glasses- Energy and Electron Transfer in Mi cellar and Polymeric Systems: Kinetic Mimicry of Chlorophyll- Microstructure and Piezoelectricity in Poly(vinylidene Fluoride) Films- Stripping Rate of Residual Styrene Monomer from Latexes of Polystyrene and SBR- Characterization of Thermal and Optical Properties of Polymers by Thermal Lensing Technique- Fraction of Polymers by U1trafiltration: A Computer Simulation Study- Entanglement Networks of 1,2-Polybutadiene Cross- Linked in States of Strain XV Simple Extension Case: Application of the CKF Theory to Stress Strain and Stress Relaxation Data- Poly(aryl Ether)-Poly(arylate) Block Copolymers: I Polysulfone-Bis-A Terephthalate Systems- Stress-Related Surface Tension Effects in Hard Elastic Polymers
411 citations
TL;DR: A family of soluble narrow band gap donor-acceptor conjugated polymers based on dioxythiophenes and cyanovinylenes is reported, which show three accessible color states changing from an absorptive blue or purple in the neutral state to a transmissive sky-blue or gray in the oxidized and reduced forms.
Abstract: A family of soluble narrow band gap donor-acceptor conjugated polymers based on dioxythiophenes and cyanovinylenes is reported. The polymers were synthesized using Knoevenagel polycondensation or Yamamoto coupling polymerizations to yield polymers with molecular weights on the order of 10 000-20 000 g/mol, which possess solubility in common organic solvents. Thin film optical measurements revealed narrow band gaps of 1.5-1.8 eV, which gives the polymers a strong overlap of the solar spectrum. The energetic positions of the band edges were determined by cyclic voltammetry and differential pulse voltammetry and demonstrate that the polymers are both air stable and show a strong propensity for photoinduced charge transfer to fullerene acceptors. Such measurements also suggest that the polymers can be both p- and n-type doped, which is supported by spectroelectrochemical results. These polymers have been investigated as electron donors in photovoltaic devices in combination with PCBM ([6,6]-phenyl C(61)-butyric acid methyl ester) as an electron acceptor based on the near ideal band structures designed into the polymers. Efficiencies as high as 0.2% (AM1.5) with short circuit current densities as high as 1.2-1.3 mA/cm(2) have been observed in polymer/PCBM (1:4 by weight) devices and external quantum efficiencies of more than 10% have been observed at wavelengths longer than 600 nm. The electrochromic properties of the narrow band gap polymers are also of interest as the polymers show three accessible color states changing from an absorptive blue or purple in the neutral state to a transmissive sky-blue or gray in the oxidized and reduced forms. The wide electrochemical range of electrochromic activity coupled with the strong observed changes in transmissivity between oxidation states makes these materials potentially interesting for application to electrochromic displays.
387 citations
TL;DR: In recent years, matrix assisted laser desorption/ionization time-of-flight (MALDI-TOF) has become a routine analytical tool for the structural analysis of polymers, complementing NMR and other traditional techniques as mentioned in this paper.
387 citations
TL;DR: A simple one-pot, low-temperature polycondensation between paraformaldehyde and 4,4ʹ-oxydianiline (ODA) that forms hemiaminal dynamic covalent networks (HDCNs), which can further cyclize at high temperatures, producing poly(hexahydrotriazine)s (PHTs).
Abstract: Nitrogen-based thermoset polymers have many industrial applications (for example, in composites), but are difficult to recycle or rework. We report a simple one-pot, low-temperature polycondensation between paraformaldehyde and 4,4ʹ-oxydianiline (ODA) that forms hemiaminal dynamic covalent networks (HDCNs), which can further cyclize at high temperatures, producing poly(hexahydrotriazine)s (PHTs). Both materials are strong thermosetting polymers, and the PHTs exhibited very high Young’s moduli (up to ~14.0 gigapascals and up to 20 gigapascals when reinforced with surface-treated carbon nanotubes), excellent solvent resistance, and resistance to environmental stress cracking. However, both HDCNs and PHTs could be digested at low pH (
377 citations
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01 Jan 1984
TL;DR: In this article, the degradation of polymers of Methacrylic acid salts and copolymers of these salts with Methyl methacrylate is discussed. But the authors focus on the reaction of small radicals with polymers during degradation and do not consider the effects of fire-retardancy in Chloroparaffin-Polymer Mixtures.
Abstract: 1. Degradation of Polymers of Methacrylic Acid Salts and Copolymers of these Salts with Methyl Methacrylate.- 2. Thermal Degradation Mechanisms in Condensation Polymers.- 3. Degradation and Stabilisation of Polyesters of Biological and Synthetic Origin.- 4. Degradation of Poly (methyl methacrylate) by Ionizing Radia-tion and Mechanical Forces.- 5. Mechanochemistry of Lignocellulosic Materials.- 6. Reactions of Small Radicals with Polymers during Degradation.- 7. Mechanism of Fire-retardancy in Chloroparaffin-Polymer Mixtures.
376 citations