Al, GülyazAydemir, DenizAltuntaş, Ertuğrul2025-01-272025-01-2720240141-81301879-0003https://doi.org/10.1016/j.ijbiomac.2024.130745https://hdl.handle.net/20.500.12428/24389This study investigates the grafting of polyhydroxybutyrate (PHB) chains with maleic anhydride (MA) in concentrations ranging from 5 % to 10 % by weight. This process was conducted during microwave treatment and using a reactive extruder, employing benzoyl peroxide (BPO) as the initiator. The impact of these methods on PHB's overall properties was thoroughly investigated. In the study, PHB-g-MA was incorporated into neat PHB via the extrusion process at a 5 % loading rate. Notably, the mechanical properties exhibited an increase in the presence of PHB-g-MA, likely due to morphological improvements in the neat PHB, as indicated by morphological characterization. X-ray diffraction results indicated crystallinity percentages increase with the addition of MA. Differential scanning calorimetry revealed minimal variation in melting and crystallization temperatures when PHB-g-MA was included. Both storage and loss moduli were enhanced by the incorporation of PHB-g-MA, and the blends exhibited consistent tan delta values. Regarding rheological properties, the storage and loss moduli of PHB blends containing PHB-g-MA blends were observed to rise with rising frequency values. Based on these results, the microwave process was identified as the most effective method for grafting.eninfo:eu-repo/semantics/closedAccessBiopolymersPolyhydroxybutyratesPHB copolymersGrafting methodsMicrowave processArticle26410.1016/j.ijbiomac.2024.130745N/AWOS:0012109209000012-s2.0-8518755754338462104Q1