The flame retardancy of a new composite polyurethaneecement foams based on the innovative concept
of “Hydration-Induced Reinforcement of Polyurethane Rigid Foams”, HIRPeC, through the formation of
an organiceinorganic co-continuous morphology have been investigated. The hybrid foams were
prepared by allowing polyether polyol mixed with catalysts, surfactants and cement (up to final weight
of 60 wt%) to react with Metylen-Diphenyl-Diisocyanate without flame retardant. The composite foams
were then cured at 60 C in water for 72 h in order to hydrate the anhydrous cement particles. The
hydrated cement phases engender a co-continuous structure within the polyurethane matrix. For
comparison both neat polyurethane foams and flame retardant filled foams were also prepared. The
composite and the hybrid foams were characterized by X-ray diffraction, mechanical compressive testing
and the scanning electron microscopy, while the thermal-oxidative properties were characterized by
thermogravimetric analysis. Cone calorimeter analysis which allowed to determine the key properties of
thermal degradation, namely the heat release rate, the smoke and CO production from foam combustion.
The hybrid foams exhibit a significant improvement of mechanical properties due to the hydration of the
cement particles as compared to the un-hydrated composite foam. The results of the thermal characterization
showed that the presence of the amounts of inorganic cement particles, alongside with the
formation of a co-continuous morphology, produces enhancements of fire behavior and improvements in
the thermal-oxidative stability of polyurethane. The flame retardancy who essentially due to the physical
action of the inorganic phase which constitutes a barrier at the surface and opposes to the diffusion of
volatiles and oxygen.
The flame retardancy of a new composite polyurethaneecement foams based on the innovative conceptof “Hydration-Induced Reinforcement of Polyurethane Rigid Foams”, HIRPeC, through the formation ofan organiceinorganic co-continuous morphology have been investigated. The hybrid foams wereprepared by allowing polyether polyol mixed with catalysts, surfactants and cement (up to final weightof 60 wt%) to react with Metylen-Diphenyl-Diisocyanate without flame retardant. The composite foamswere then cured at 60 C in water for 72 h in order to hydrate the anhydrous cement particles. Thehydrated cement phases engender a co-continuous structure within the polyurethane matrix. Forcomparison both neat polyurethane foams and flame retardant filled foams were also prepared. Thecomposite and the hybrid foams were characterized by X-ray diffraction, mechanical compressive testingand the scanning electron microscopy, while the thermal-oxidative properties were characterized bythermogravimetric analysis. Cone calorimeter analysis which allowed to determine the key properties ofthermal degradation, namely the heat release rate, the smoke and CO production from foam combustion.The hybrid foams exhibit a significant improvement of mechanical properties due to the hydration of thecement particles as compared to the un-hydrated composite foam. The results of the thermal characterizationshowed that the presence of the amounts of inorganic cement particles, alongside with theก่อตัวของสัณฐานวิทยาที่บริษัทอย่างต่อเนื่อง ผลิตปรับปรุงลักษณะการทำงานของไฟและการปรับปรุงในความมั่นคงความร้อน oxidative ของ polyurethane Retardancy เปลวไฟซึ่งเป็นหลักเนื่องจากจริงการดำเนินการของเฟสอนินทรีย์ซึ่งถือเป็นอุปสรรคที่พื้นผิว และการแพร่ของ opposesvolatiles และออกซิเจน
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