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Characterization and degradation of poly(methylphenylsiloxane)–poly(methyl methacrylate) interpenetrating polymer networks

✍ Scribed by T. C. Chang; K. H. Wu; C. L. Liao; G. P. Wang

Publisher
John Wiley and Sons
Year
1999
Tongue
English
Weight
206 KB
Volume
37
Category
Article
ISSN
0887-624X

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✦ Synopsis

Poly(methylphenylsiloxane)-poly(methyl methacrylate) interpenetrating polymer networks (PMPS-PMMA IPNs) were prepared by in situ sequential condensation of poly(methylphenylsiloxane) with tetramethyl orthosilicate and polymerization of methyl methacrylate. PMPS-PMMA IPNs were characterized by infrared (IR), differential scanning calorimetry (DSC), and 29 Si and 13 C nuclear magnetic resonance (NMR). The mobility of PMPS segments in IPNs, investigated by proton spin-spin relaxation T 2 measurements, is seriously restricted. The PMPS networks have influence on the average activation energy E a,av of MMA segments in thermal degradation at initial conversion.

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