| 
      Where -r-PF refers to reinforced Phenol-formaldehyde.
        | 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 |  |