Composite Strength Test
MOR(N/mm2) MOE(N/mm2) SP(N/mm2) Hardness(HRB)
Phenol-formaldehyde 43.20 496.12 38.40 Brittle
H. sabdariffa-r-PF 69.99 614.40 57.60 67.00
Hs-g-poly(EA)-r-PF 82.04 898.56 74.24 75.00
Hs-g-poly(EA-co-AN)-r-PF 116.40 1096.96 02.84 79.00
Hs-g-poly(EA-co-MA)-r-PF 80.80 690.99 74.78 78.00
where, -r-PF refers to reinforced Phenol-formaldehyde
Table 7: MOR, MOE, SP and Hardness studies of graft copolymers reinforced P-F composite vis-a-vis P-F resin.
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