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Flexible and rigid biopolymer foam were prepared by the reaction of polyol based on waste vegetable oil with commercial Polymethane Polyphenyl Isocyanate (Modified Polymeric-MDI) and Diisocyanate-diphenylmethane (MDI).The morphological study of flexible and rigid biopolymer foam were examined by Scanning Electron Microscope (SEM), Thermogravimetric analysis (TGA) and density. It was found that the density of flexible and rigid biopolymer foam was steadily increased after using hot compression moulding technique at 90^oC. Furthermore, the flexible and rigid biopolymer foam gives a close cell structure and smallest cell size with hot compression technique which is 143.71 µm and 90.01 µm respectively. The thermal stability of rigid biopolymer foams exhibited the first degradation of hard segment occur at 276.32^oC and the second degradation of soft segment at  421.05^oC as compared to flexible biopolymer foam which is 238.39 ^oC and 419.44 ^oC, respectively.  This behavior of thermal degradation of the hard segment and soft segment of biopolymer foam was changes after using hot compression moulding technique.