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Synthesis, characterization, and properties of interpenetrating polymer networks containing functionalized latex particles
Author(s) -
Hourston Douglas J.,
Schäfer FranzUlrich,
Bates John S.
Publication year - 1996
Publication title -
journal of applied polymer science
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.575
H-Index - 166
eISSN - 1097-4628
pISSN - 0021-8995
DOI - 10.1002/(sici)1097-4628(19960627)60:13<2409::aid-app13>3.0.co;2-#
Subject(s) - materials science , characterization (materials science) , polymer , polymer science , interpenetrating polymer network , polymer chemistry , chemical engineering , composite material , nanotechnology , engineering
Three‐component interpenetrating polymer networks (IPNs) comprising polyurethane (PUR), poly(n‐butyl methacrylate) (PBMA), and polystyrene (PS) latex particles were prepared in a modified one‐shot synthesis. The hydroxy‐functionlized and unmodified polystyrene latex particles were synthesized via a seeded emulsion polymerization. The incorporation of hydroxyethyl methacrylate into the latex particles was confirmed via diffuse reflectance infrared analysis and modulated‐temperature differential scanning calorimetry. The IPNs were characterized by dynamic mechanical thermal analysis, tensile testing, hardness measurements, and transmission electron microscopy. The three‐component materials exhibited higher values for the Young's modulus and the Shore A hardness and for the dynamic storage modulus in the higher temperature range from 80 to 140°C than did the PUR/PBMA IPN alone. The latex particles with the hydroxyl functionality exhibited a better miscibility with the microheterogeneous PUR/PBMA IPN than did unfunctionalized PS latex particles, and, therefore, resulted in materials with better damping properties in the temperature range between 80 and 140°C. Transmission electron micrographs confirmed the imporved miscibility of the functionalized latex particles. The latex particles were not, however, dispersed on an individual level but formed agglomerates of between 2 and 20 μm. © 1996 John Wiley & Sons, Inc.