Heterophase Network Polymers

Abstract

This volume explains the theory and experimental investigations in the preparation of heterophase polymer network materials through cure reaction-induced microphase separation (CRIMPS). It describes the synthesis of a new family of block- and graft-copolymers with controlled solubility in epoxies and characterizes CRIMPS processes using novel applications of known methods such as nuclear magnetic resonance, electron spin resonance and photochemistry. The text develops a new method for characterizing the molecular mass distribution (MMD) of linear and network polymers using thermomechanical analysis data, as well as new methods for determining internal stresses and flaw formation during thermoset curing. The CRIMPS theory will be helpful for researchers and engineers designing and improving toughened plastics and other smart heterophase network materials for different applications. The new method for MMD characterization of polymers in bulk will be very useful to quickly analyze a polymer's MMD and to design new polymers. This book will provide a useful reference for graduates, researchers and working professionals in polymer chemistry and physics and materials science. kmKk3P3R1XMC Table of Contents Preface List of Contributors I Synthesis and Characterization of Modifiers 1 Ch. 1 Synthesis of Well-Defined Bifunctional Oligobutadienes as Initiated by Dilithium Alkanes Soluble in Hydrocarbons 3 Ch. 2 Synthesis of Block Copolymers with Controlled Solubility in Epoxy Resins 15 Ch. 3 Universal Calibration in Gel Permeation Chromatography of Oligomers 27 Ch. 4 Phase Equilibrium in Binary Polymer Systems Based on Diglycidyl Ether of Bisphenol A 33 II Theory of Microphase Separation in Curing Systems 43 Ch. 5 Cure Reaction-Induced Microphase Separation in Multicomponent Blends: Theory of Nonequilibrium Nucleation and Growth 45 Ch. 6 Analytical Description of Microphase Formation in Curing Polymer Blends 63 Ch. 7 Two-Dimensional Model of Phase Separation during Polymerization of a Binary Polymer Blend 79 Ch. 8 Theory and Simulation for Dynamics of Polymerization-Induced Phase Separation in Reactive Polymer Blends 91 Ch. 9 Phase Diagrams of Multicomponent Reacting Polymer Systems Undergoing Phase Decomposition 107 III Kinetics and Mechanism of Cure Reactions and Reaction-Induced Microphase Separation 117 Ch. 10 Cure Rate and CRIMPS Mechanism 119 Ch. 11 The Role of Intermolecular Interactions in Polyurethane Formation 129 Ch. 12 Formation of Spatial Dissipative Structures During Synthesis of Polyurethanes 139 IV Structure-Properties Relationship 151 Ch. 13 Thermoset/Thermoplastic Blends with a Crosslinked Thermoplastic Network Matrix 153 Ch. 14 Epoxy-Based PDLCs: Formation, Morphological, and Electrooptical Properties 167 Ch. 15 Crosslinking Studies in Rigid and Semi-Rigid Polymers 181 Ch. 16 Modeling Shrinkage Defects in Fiber Composites 199 Ch. 17 Analysis of Shrinkage Cracking in Three-Dimensionally Constrained Heterophase Network Polymers 209 Ch. 18 Modeling Polymer Film Formation by Spin Coating 223 Ch. 19 Thermal Decomposition of Thin Polyepoxide Films 235 V New Approaches to Polymer Networks Characterization 245 Ch. 20 Characterization of Molecular Weight Distribution for Linear and Network Polymers in the Bulk 247 Ch. 21 Microphase Separation in Epoxies as Studied by Photoactive Probe Technique 261 Ch. 22 Investigation of CRIMPS by NMR 271 Ch. 23 CRIMPS in an Epoxy-Amine System as Studied by ESR 279 Ch. 24 Gelation and Reaction-Induced Microphase Separation during Cure of Model Epoxy-Amine Systems as Studied by Dielectroscopy 289 Ch. 25 Pulsed NQR for Measuring Internal Stresses in Polymers and Composites 301 Subject Index