TY - GEN
T1 - Polycarbonate composites flame-retarded by poly(phenylsilsesquioxane)
AU - Jiang, Yunyun
AU - Li, Xiangmei
AU - Yang, Rongjie
PY - 2011
Y1 - 2011
N2 - Poly(phenylsilsesquioxane) (PPSQ) of ladder chain structure was synthesized and characterized, then used in flame-retarding polycarbonate (PC) in this article. The PC/PPSQ composites with different loading level of PPSQ were blended by twin-screw extruder and moulded. It was observed by SEM that the PPSQ particles were dispersed in PC in the size of 0.5-1.5μm. In mechanical properties, addition of the PPSQ to PC could maintain fracture strain of the composites. In improving flame-retardancy of the PC, the PPSQ was verified to be very effective. The 6.0 wt% PPSQ could reduce peak heat release rate (PHRR) of the PC composites from 570 to 212 kW/m2, and made it reach the combustion rating of UL 94 V-0 (1.6 mm). The char of the composites burnt after the cone calorimeter testing was intumescent, and exhibited structures of thin layered membranes. TG-FTIR analysis revealed that the PPSQ weakened CO2 release of the late thermal decomposition of PC.
AB - Poly(phenylsilsesquioxane) (PPSQ) of ladder chain structure was synthesized and characterized, then used in flame-retarding polycarbonate (PC) in this article. The PC/PPSQ composites with different loading level of PPSQ were blended by twin-screw extruder and moulded. It was observed by SEM that the PPSQ particles were dispersed in PC in the size of 0.5-1.5μm. In mechanical properties, addition of the PPSQ to PC could maintain fracture strain of the composites. In improving flame-retardancy of the PC, the PPSQ was verified to be very effective. The 6.0 wt% PPSQ could reduce peak heat release rate (PHRR) of the PC composites from 570 to 212 kW/m2, and made it reach the combustion rating of UL 94 V-0 (1.6 mm). The char of the composites burnt after the cone calorimeter testing was intumescent, and exhibited structures of thin layered membranes. TG-FTIR analysis revealed that the PPSQ weakened CO2 release of the late thermal decomposition of PC.
KW - Flame retardancy
KW - Ladder polyphenylsilsesquioxane
KW - Polycarbonate
UR - http://www.scopus.com/inward/record.url?scp=84893214157&partnerID=8YFLogxK
M3 - Conference contribution
AN - SCOPUS:84893214157
SN - 9781618394699
T3 - 22nd Annual Conference on Recent Advances in Flame Retardancy of Polymeric Materials 2011
SP - 265
EP - 279
BT - 22nd Annual Conference on Recent Advances in Flame Retardancy of Polymeric Materials 2011
T2 - 22nd Annual Conference on Recent Advances in Flame Retardancy of Polymeric Materials 2011
Y2 - 23 May 2011 through 25 May 2011
ER -