Hollow pellets and methods of soaking

A process comprising:

• providing a pellet having a body having a body surface and a body surface area, the body surface comprising a shell surface and a facial surface, the body surface area comprising a shell surface area and a facial surface area, the body having a first end and an opposing second end, the body composed of a polymeric material, the body having a length and a diameter (body diameter),
• the pellet having a channel having a channel surface and a channel surface area, the channel having a diameter (channel diameter), the channel defining a void space extending through the body from the first end to the second end, the pellet has a channel diameter-to-body diameter ratio from 0.05 to 0.45 and the pellet has a channel surface area-to-body surface area ratio from 0.03 to 0.23;
• soaking the pellet in an additive, the additive in a liquid state, the additive having a material selected from the group consisting of a silane, an organic peroxide, an isocyanurate and combinations thereof;
• and
• forming a loaded pellet having the material in the body.