Interpenetrating polymer networks of polyurethane and furfuryl alcohol. I. Morphology and mechanical properties
作者:
C.‐C. M. Ma,
D. Y. Goang,
J. L. Han,
K. H. Hsieh,
期刊:
Die Angewandte Makromolekulare Chemie
(WILEY Available online 1994)
卷期:
Volume 214,
issue 1
页码: 39-56
ISSN:0003-3146
年代: 1994
DOI:10.1002/apmc.1994.052140105
出版商: Hüthig&Wepf Verlag
数据来源: WILEY
摘要:
AbstractPolyurethane/furfuryl alcohol (PU/FA) interpenetrating polymer networks (IPNs) were synthesized from furfuryl alcohol using p‐toluene sulfonic acid as a catalyst and blocked NCO‐terminated PU prepolymer with m‐xylylenediamine (MXDA) as a chain extender. From IR spectrum analysis it was found that the major reactions in the PU/MXDA/FA system are the polymerization of PU/MXDA and the self‐polymerization of FA. The tensile strengths of PU/FA IPNs that contain 5 p.h.r. PU are greater than those of the pure components. The flexural strength, flexural modulus, Shore D hardness and HDT decrease and the notched Izod impact strength increases with the polyurethane content. The compatibility of the compounds in these PU/FA IPNs was investigated by dynamic mechanical analysis and scanning electron microscopy. It was found that glass transition temperatures are shifted inwardly which indicated that the PU/FA IPNs were semicompatible. It was confirmed from scanning electron micrography that the system was hetero
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