▎ 摘　　要

NOVELTY - Golf ball (10) comprises a core comprising polybutadiene in an amount ranging from 40-90 wt.% of the core, zinc diacrylate in an amount ranging from 10-50 wt.% of the core, zinc oxide in an amount ranging from 1-30 wt.% of the core, and a graphene material in an amount ranging from 0.1-5.0 wt.% of the core, an inner mantle layer disposed over the core. The inner mantle layer having a thickness ranging from 0.03-0.09 inch, an outer mantle layer disposed over the inner mantle layer. The outer mantle layer having a thickness ranging from 0.025-0.050 inch, and a cover layer disposed over the outer mantle layer. The golf ball comprising an inner core (12a), an outer core (12b), an inner mantle (14a), an outer mantle (14b), and a cover (16). USE - Golf ball. ADVANTAGE - The exfoliated graphite composite with improved thermal stability by in-situ polymerization of styrene in presence of exfoliated graphene. The technique improve durability of golf ball core by incorporation of graphene in the core to improve the impact strength of the ball. This benefit can be seen in either a ball with single piece core, or a dual core with an outer core firmer than the inner core. The improved durability of the core by using graphene can result in higher mean time to fail (MTTF) upon repeated impact in a high speed testing device, or with a golf club in normal play. DESCRIPTION OF DRAWING(S) - The drawing shows a schematic view of a five piece golf ball. Golf ball (10) Inner core (12a) Outer core (12b) Inner mantle (14a) Outer mantle (14b) Cover (16 )