Sintesis Membran Poliuretan dari Asam Lemak Bebas Teroksidasi Tolulen Diisosianat

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Abstrak: Polyurethane  (PU)  membranes  was  prepared  by  reacting  the  free  fatty  acids  and  fatty  acids that have been oxidazed from castor oil with a 2,4-toluen di-isocyanate (TDI). He effect of of monomer  composition,  temperature,  and  polymerization  time  was  studied  on  the performances  of  flat  sheet  membrane.  Experimental  results  showed  that  the  optimum conditions  of  the  membrane  synthesis    from  free  fatty  acid  by  oxidation-methylation  was obtained at ratio of 1.2: 0.56 (mol / mol), temperature of 100°C and polymerization time of 5 minutes. The resulting  membranes are transparent,  elastic, homogeneous, robust and has a glass  transition  point  of  127.4°C  and  had  stensile  strength  about  41.7  MPa.  Infrared spectrum  (IR)  observation  showed  that  the  persistence  of  the  peak  –CO  from  -NCO  at wavenumber  2272.9  cm-1,  whereas  the  -OH  group  was  disaapear  at  wave  numbers  3100-3300  cm-1.  This  indicated  that  the  polymerization  reaction  of  PU  membrane  synthesis  from free fatty acids was done successfully.
Keyword: Castor oil, free fatty acids, inframerah (IR), 2,4-tolulen di-isocyianat (TDI)
Penulis: Marlina
Kode Jurnal: jpkimiadd120036

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Jp Kimia dd 2012