TY - JOUR

T1 - Effects of novel phosphorus-nitrogen-containing DOPO derivative salts on mechanical properties, thermal stability and flame retardancy of flexible polyurethane foam

AU - Ma, Shicong

AU - Xiao, Yuling

AU - Zhou, Feng

AU - Schartel, Bernhard

AU - Chan, Yin Yam

AU - Korobeinichev, Oleg P.

AU - Trubachev, Stanislav A.

AU - Hu, Weizhao

AU - Ma, Chao

AU - Hu, Yuan

PY - 2020/7

Y1 - 2020/7

N2 - In this work, a series of 9,10-dihydro-9-oxa-10-phosphaphenanthrene-10-oxide (DOPO) derivative salts containing phosphorus and nitrogen were synthesized, and their effects on mechanical properties, thermal stability and flame retardancy of flexible polyurethane foam (FPUF) were investigated. Studies have shown that the addition of DOPO derivatives will increase the tensile strength, compression set, and compression hardness of FPUF, but it will lead to a decrease in elongation at break. Thermogravimetric analysis showed that the initial decomposition temperature of FPUF containing DOPO derivatives was reduecd, but the char reside was significantly improved. A series of combustion tests indicated that the addition of DOPO derivative salts can improve the flame retardancy of FPUF, of which 10-hydroxy-9,10-dihydro-9-oxa-10-phosphaphenanthrene-10-oxide dicyandiamide salt (D-DICY) exhibited the best flame retardancy. When the load of D-DICY was 20 phr, the limiting oxygen index (LOI) of foam reached 24.5%, and the peak heat release rate and total heat release were decreased by 55.7% and 52.9%, respectively. Furthermore, based on the analysis of the gas phase combustion products and the char residue of the condensed phase, the possible flame retardant mechanism was proposed.

AB - In this work, a series of 9,10-dihydro-9-oxa-10-phosphaphenanthrene-10-oxide (DOPO) derivative salts containing phosphorus and nitrogen were synthesized, and their effects on mechanical properties, thermal stability and flame retardancy of flexible polyurethane foam (FPUF) were investigated. Studies have shown that the addition of DOPO derivatives will increase the tensile strength, compression set, and compression hardness of FPUF, but it will lead to a decrease in elongation at break. Thermogravimetric analysis showed that the initial decomposition temperature of FPUF containing DOPO derivatives was reduecd, but the char reside was significantly improved. A series of combustion tests indicated that the addition of DOPO derivative salts can improve the flame retardancy of FPUF, of which 10-hydroxy-9,10-dihydro-9-oxa-10-phosphaphenanthrene-10-oxide dicyandiamide salt (D-DICY) exhibited the best flame retardancy. When the load of D-DICY was 20 phr, the limiting oxygen index (LOI) of foam reached 24.5%, and the peak heat release rate and total heat release were decreased by 55.7% and 52.9%, respectively. Furthermore, based on the analysis of the gas phase combustion products and the char residue of the condensed phase, the possible flame retardant mechanism was proposed.

KW - DOPO derivative salts

KW - Flame retardancy

KW - Flexible polyurethane foam

KW - Mechanical properties

KW - Thermal stability

KW - FIRE HAZARD

KW - PERFORMANCE

KW - DECOMPOSITION

KW - ZIRCONIUM-PHOSPHATE

KW - RESINS

KW - FRAMEWORKS

KW - CONSTRUCTION

KW - SMOKE-SUPPRESSANT

KW - COATINGS

KW - HYBRID

UR - http://www.scopus.com/inward/record.url?scp=85083099473&partnerID=8YFLogxK

U2 - 10.1016/j.polymdegradstab.2020.109160

DO - 10.1016/j.polymdegradstab.2020.109160

M3 - Article

AN - SCOPUS:85083099473

VL - 177

JO - Polymer Degradation and Stability

JF - Polymer Degradation and Stability

SN - 0141-3910

M1 - 109160

ER -