Spectrum of residue after heated at 240 C is rarely changed
compared with that at room temperature (20 C). It could
be seen that the obvious change occurs from 240 to 400 C. It
indicates that themain pyrolysis performance of the composite
proceeds from 240 to 400 C. For the residue after heated at
300 C, absorptions at 3310, 2867–2985 and 1733 cm-1 are
weakened, remarkably. In addition, typical absorption peaks
of benzene ring skeleton are no longer observed. It may be
proposed that the first step of the degradation consists of the
reverse of the reaction of polyaddition. On the other hand, a
band around 995 cm-1 (P–O–C) appears above 300 C,which
might be formed fromthe reaction of PPAs and CW. Residues
after heated at 500, 550 and 600 C show the similar
absorptions at 995 cm-1 (P–O–C), 1145 cm-1 (C–O–C),
1643 and 1537 cm-1. The absorptions appearing at 1643 and
Spectrum of residue after heated at 240 C is rarely changedcompared with that at room temperature (20 C). It couldbe seen that the obvious change occurs from 240 to 400 C. Itindicates that themain pyrolysis performance of the compositeproceeds from 240 to 400 C. For the residue after heated at300 C, absorptions at 3310, 2867–2985 and 1733 cm-1 areweakened, remarkably. In addition, typical absorption peaksof benzene ring skeleton are no longer observed. It may beproposed that the first step of the degradation consists of thereverse of the reaction of polyaddition. On the other hand, aband around 995 cm-1 (P–O–C) appears above 300 C,whichmight be formed fromthe reaction of PPAs and CW. Residuesafter heated at 500, 550 and 600 C show the similarabsorptions at 995 cm-1 (P–O–C), 1145 cm-1 (C–O–C),1643 and 1537 cm-1. The absorptions appearing at 1643 and
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