Publisher: Chemical Society of Nigeria

The Chemical Composition of An Under-Utilised Tropical African Seed: Adenanthera Pavonina

M. D. Ayo, L. O. Ekebafe, K. O. Eguare
KEYWORDS: Dika nutshell, compounding, Natural rubber and Vulcanisate.

ABSTRACT:

This  study  was  aimed  at  the  development  of  value  added  product  from  Dika  nut  that  will  be suitable  for  use  in  natural  rubber  processing  from  Dika  nut.  The  Dika  nutshell  powder  was characterized  in  terms  of  loss  on  ignition,  moisture  content,  iodine  adsorption  number,  oil absorption  and  pH.  The  powdered  Dika  nut  shell  pericalp  was  compounded  with  natural  rubber using  varying  filler  loading  (unfilled,  20phr,  30phr,  40phr,  and  50phr)  and  the  physiomechanical  properties  of  the  vulcanisates  were  determined.  These  properties  include:  tensile strength,  hardness,  abrasion  resistance,  compression  set,  elongation  at  break,  modulus  and solvent  resistant.  The  result  shows  that  Dika  nutshell  filled  Vulcanisate  has  a  high  reinforcement at  filler  loading  of  30-40phr  and  at  a  certain  higher  level  it  only  acts  as  diluents.  Furthermore, Dika  nutshell  is  grouped  as  semi-reinforcing  filler  having  the  iodine  adsorption  number  of 50.64g/kg, which is about half the value of carbon black. 


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