反応性リン・硫黄含有難燃モノマーが不飽和ポリエステル樹脂の難燃性および熱的・機械的特性に及ぼす影響（英文

Effects of a Reactive Phosphorus-Sulfur Containing Flame-Retardant Monomer on the Flame Retardancy and Thermal and Mechanical Properties of Unsaturated Polyester Resin.

• Kang Dai
• Zhenzhen Deng
• Guyue Liu
• Yutong Wu
• Wenbin Xu
• Yuan Hu

抄録

不飽和ポリエステル樹脂の総合性能を向上させるために新規な反応性リン・硫黄含有モノマー（ビス（アクリロキシエチルジフェニルホスフェート）スルホン，BADPS）を合成し，ラジカルバルク重合法によりBADPSを多量に添加した難燃性不飽和ポリエステル樹脂（FR-UPR）を調製した。これらの難燃性と熱的・機械的特性を、限界酸素指数(LOI)測定、コーン熱量測定、示差走査熱量測定(DSC)、熱重量分析(TGA)、引張試験により調べた。その結果、BADPSを導入することにより、難燃性と高温安定性が著しく向上し、引張性能も向上することが明らかになった。走査型電子顕微鏡(SEM),フーリエ変換赤外分光法(FTIR),ラマン分光法による研究から、BADPSは微細構造を改善し、黒鉛化度を増加させることで、UPRの高温安定性とチャー収率を向上させる効果があることが明らかになった。さらに、熱重量-フーリエ変換赤外(TG-FTIR)分析の結果、BADPSの添加により、UPRの分解による可燃性揮発分の発生が大幅に抑制され、UPRの火災抑制に有効であることを確認した。

A novel reactive phosphorus and sulfur-containing monomer (bis(acryloxyethyldiphenylphosphate)sulfone, BADPS) was synthesized to enhance the comprehensive performance of unsaturated polyester resin (UPR),and corresponding flame-retardant unsaturated polyester resins (FR-UPRs) with various amounts of BADPS were prepared by radical bulk polymerization. The flame retardancy and thermal and mechanical properties of the UPR samples were investigated by limiting oxygen index (LOI) measurements, cone calorimetry, differential scanning calorimetry (DSC),a thermogravimetric analysis (TGA), and a tension test. The results showed that the introduction of BADPS remarkably enhanced the flame resistance and high-temperature stability, as well as the tensile performance of UPR. Scanning electron microscopy (SEM),Fourier transform infrared (FTIR), and Raman spectroscopy studies revealed that BADPS can efficaciously promote the formation of UPR char residue with an improved microstructure and increased graphitization degree, which enhancedthe high-temperature stability and char yield of UPR. Additionally, a thermogravimetry-Fourier transform infrared (TG-FTIR) analysis corroborated that the evolution of combustible volatiles from UPR decomposition was substantially restrained by the incorporation of BADPS, which is beneficial for the suppression of fire hazards in UPR.