Composite Weight loss at different loads(×10-4 gm/m)
  1 Kg 2 Kg 3 Kg
Phenol-formaldehyde 9.0 15.0 20.0
H. sabdariffa-r-PF 6.0 7.0 8.0
Hs-g-poly(AN)-r-PF 5.0 6.4 7.6
Hs-g-poly(AN-co-MA)-r-PF 4.0 5.0 6.0
Hs-g-poly(AN-co-AA)-r-PF 4.0 5.6 6.5
Hs-g-poly(AN-co-BA)-r-PF 3.5 4.0 6.0
Where -r-PF refers to reinforced Phenol-formaldehyde.
Table 4: Wear rate of graft copolymers reinforced P-F composites vis-à-vis P-F resin.