%A Wei ZHOU,Puyou JIA,Meng ZHANG,Yonghong ZHOU %T Preparation and Characterization of Nitrogen-containing Heterocyclic Tung Oil-based Rigid Polyurethane Foam %0 Journal Article %D 2019 %J Chemistry and Industry of Forest Products %R 10.3969/j.issn.0253-2417.2019.02.008 %P 53-58 %V 39 %N 2 %U {http://www.cifp.ac.cn/CN/abstract/article_2554.shtml} %8 2019-04-28 %X

Nitrogen-containing heterocyclic tung oil-based polyol (PTOT) was synthesized by the ring opening reaction between epoxidized eleostearic acid monoglyceride (EGTO) and 1, 3, 5-tris(2-hydroxyethyl) isocyanurate (THEIC). PTOT was used to substitute part of phthalic anhydride polyester polyol (PAPP) to prepare rigid polyurethane foam(RPUF). FT-IR, 1H NMR, TG and universal testing machine were employed to characterize the chemical structure and the properties of the products. It can conclude that PTOT was obtained by the ring opening reaction, and the hydroxyl value and viscosity (25 ℃), acid value and moisture of PTOT were 378.42 mg/g and 1.84 Pa·s, respectively. The acid value was lower than 0.8 mg/g and the moisture was lower than 0.1%.With the increase of PTOT substitution amount, the limiting oxygen index (LOI) of the RPUF was increased while the compressive strength and thermal stability were decreased. When the amount of PTOT increased from 0 to 100%, the LOI increased from 19.7% to 23.0%, the compression strength decreased from 0.85 MPa to 0.59 MPa and the initial degradation temperature decreased from 276.0 ℃ to 273.5 ℃, respectively. The introduction of an appropriate amount of cellulose into RPUF could enhance the mechanical strength and retain its flame retardancy and thermal stability without lowering.