TY - JOUR
T1 - Degradation kinetics of functionalized novolac resins
AU - Wu, Hsin Ho
AU - Chu, Peter P.
N1 - Funding Information:
This research work is funded by National Science Council (Taiwan) under the contract no.: NSC 95-2113-M-008-014-MY3 . We are grateful to the instruments support of this work by the industrial technology research institute (ITRI) in characteristics analysis.
PY - 2010/9
Y1 - 2010/9
N2 - We report the relationships between the degradation behaviors (i.e. the degradation kinetics, degradation activation energy, weight loss conversion, and char formation) and the structure features in three modified novolac resins bearing different curable functional groups and aromatic units i.e. Carbonyl phenyl azo novolac resin (CPAN), 4-(4-hydroxyphenyl azo) benzyl ester novolac resin (HPDEN) and Carbonyl phenyl 4-(4-hydroxyphenyl azo) benzyl ester novolac resin (CHABN). These modifications enhanced the thermal stability of the cured novolac resins by delaying the decomposition temperature up to 30-100 °C and produced prominent residue char yield up to 68% (CPAN), 56% (HPDEN) and 64% (CHABN), respectively. The two heavily cross-linked samples, CPAN and CHABN displayed even higher Ea than HPDEN. All modified novolacs displayed much higher decomposition activation energy (over 237 KJ/mol (*)K) compared with the generic phenolic (PN).
AB - We report the relationships between the degradation behaviors (i.e. the degradation kinetics, degradation activation energy, weight loss conversion, and char formation) and the structure features in three modified novolac resins bearing different curable functional groups and aromatic units i.e. Carbonyl phenyl azo novolac resin (CPAN), 4-(4-hydroxyphenyl azo) benzyl ester novolac resin (HPDEN) and Carbonyl phenyl 4-(4-hydroxyphenyl azo) benzyl ester novolac resin (CHABN). These modifications enhanced the thermal stability of the cured novolac resins by delaying the decomposition temperature up to 30-100 °C and produced prominent residue char yield up to 68% (CPAN), 56% (HPDEN) and 64% (CHABN), respectively. The two heavily cross-linked samples, CPAN and CHABN displayed even higher Ea than HPDEN. All modified novolacs displayed much higher decomposition activation energy (over 237 KJ/mol (*)K) compared with the generic phenolic (PN).
KW - Cross-linking density
KW - Thermal degradation energies (Ea)
KW - Thermal stability
UR - http://www.scopus.com/inward/record.url?scp=77955517798&partnerID=8YFLogxK
U2 - 10.1016/j.polymdegradstab.2010.04.024
DO - 10.1016/j.polymdegradstab.2010.04.024
M3 - 期刊論文
AN - SCOPUS:77955517798
SN - 0141-3910
VL - 95
SP - 1849
EP - 1855
JO - Polymer Degradation and Stability
JF - Polymer Degradation and Stability
IS - 9
ER -