Synthesis of Flame Retardant Phosphorus Containing Polyols from Canola Oil

• Author / Creator

  Liew, Siew Meng

• Phosphorus containing polyols were synthesized from canola oil. Epoxidized canola oil was transesterified with 1,3 propanediol to introduce one reactive primary hydroxyl group. Incorporation of phosphorus into these structures was explored using three different epoxy ring opening reactions – reaction with phosphoric acid, ethyl phosphates and dibutyl phosphate. The phosphate ester structures initially formed were found to be unstable, ultimately leading to the formation of cyclic dioxaphospholane structure. The effects of these chemical changes on the characteristics of the polyols for polyurethane preparation were studied. The reactive flame retardant canola oil based polyol was successfully replaced all of the polyol content used for the preparation of rigid polyurethane foams with biocontent of more than 90%. These were shown to have significantly improved flame retardancy and were self-extinguishing.

• Subjects / Keywords

  • canola oil
  • polyols
  • flame retardant
  • phosphate
  • fire retardant
  • biobased
  • phosphorus
  • polyurethane

• Graduation date

  Fall 2017

• Type of Item

  Thesis

• Degree

  Master of Science

• DOI

  https://doi.org/10.7939/R3HD7P843

• License

  This thesis is made available by the University of Alberta Libraries with permission of the copyright owner solely for non-commercial purposes. This thesis, or any portion thereof, may not otherwise be copied or reproduced without the written consent of the copyright owner, except to the extent permitted by Canadian copyright law.