Journal
JOURNAL OF APPLIED POLYMER SCIENCE
Volume 102, Issue 3, Pages 2946-2952Publisher
JOHN WILEY & SONS INC
DOI: 10.1002/app.24441
Keywords
phenol-urea-formaldehyde copolymers; heterogeneous catalysis; gel permeation chromatography; C-13-NMR-spectroscopy; MALDI-TOF mass spectrometry
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A new synthetic strategy for PUF copolymers based on three steps was developed. In the first step, two precondensates of phenol with formaldehyde and urea with formaldehyde, respectively, were produced. In the second step, the two precondensates were mixed and condensed using a heterogeneous catalyst in a tube reactor at 90 degrees C. The last step is a vacuum distillation to reach the final copolymer compositions. With regard to the properties, the products can be used as adhesive. The copolymers were analysed by gel permeation chromatography (GPC), C-13-NMR-spectroscopy, and MALDI-TOF mass spectrometry. (c) 2006 Wiley Periodicals, Inc.
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