| HR-PIB | Highly Reactive Polyisobutene) |
| MAA | Maleic anhydride |
| PIBSA | Polyisobutylene Succinic Anhydride |
| PIBSI | Polyisobutylene Succinimide |
| Mn | Number-Average Molecular Weight |
| GPC | Gel Permeation Chromatography |
| DOE | Design of experiments |
| RSM | Response Surface Methodology |
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