China Plastics ›› 2021, Vol. 35 ›› Issue (9): 34-39.DOI: 10.19491/j.issn.1001-9278.2021.09.006

• Materials and Properties • Previous Articles     Next Articles

Synthesis of Polyester⁃type Double Bond⁃terminated Polyurethane Prepolymer and Its Application in Bulk Molding Compounds

LIU Lei(), YANG Jianjun(), WU Qingyun, WU Mingyuan, ZHANG Jianan, LIU Jiuyi   

  1. Key Laboratory of Environment?friendly Polymer Materials of Anhui Province,School of Chemistry and Chemical Engineering,Anhui University,Hefei 230601,China
  • Received:2021-01-20 Online:2021-09-26 Published:2021-09-23

Abstract:

Polyester-type double bond-terminated polyurethane prepolymer (HPU) was synthesized by using a high adhesive and high heat-resistant diol (XC-488), toluene diisocyanate (TDI) and hydroxyethyl methacrylate (HEMA) as raw materials. The bulk molding plastics (BMC) were prepared through blending HPU with unsaturated polyester resin, short cut glass fiber, calcium carbonate, flame retardant at different loadings. Fourier-transform infrared spectroscopy, differential scanning calorimeter, mechanical property test, water absorption test, melt fluidity test, acid-base resistance test, aging test and scanning electron microscope were used to characterize the structures and properties of the resultant BMC. The results indicated that the composite achieved the optimal comprehensive mechanical properties at an HPU content of 6 wt%. They also achieved tensile strength of (47.24±0.42) MPa, bending strength of (117.76±0.65) MPa and impact strength of (33.8 ± 0.2) kJ/m2.

Key words: bulk molding compound, polyurethane prepolymer, double bond termination, hydroxyethyl methacrylate

CLC Number: