TY - JOUR ID - 68967 TI - Investigation on Crystallinity Behavior of the Polylactic Acid and Poly-3-hydroxybutyrate Bio-based Polymers in the Presence of the Pyromellitic Anhydride JO - Journal of Applied Biotechnology Reports JA - JABR LA - en SN - 2322-1186 AU - Pourjafar Devin, Tayebeh AU - Ahmadi, Zahed AU - Afshari Taromi, Faramarz AD - Department of Chemistry, Amirkabir University of Technology, Tehran, Iran AD - Department of Polymer Engineering and Color Technology, Amirkabir University of Technology, Tehran, Iran Y1 - 2017 PY - 2017 VL - 4 IS - 3 SP - 661 EP - 668 DO - N2 - Bio-based polymers have attracted significant attentions because of their renewable nature which can be a substitute of petroleum-based polymers; moreover, such polymers do not pollute the environment due to their degradable nature. In this research,the poly lactic acid (PLA) and poly-3-hydroxybutyrate (PHB) blend, as biodegradable polymers, behavior was investigated. Different ratios of PLA/PHB blend were prepared using solution casting method in the presence of the pyromel- litic anhydride (PMDA) as acompatibilizer. DSC results revealed that the PMDA presence caused to separation of α-helix crystals and β-plate in two polymers re- sulting in phase separation via altering the crystallinity rate. PMDA can control the crystallization phenomenon which affected the crystallization rate, percentage and crystal size. Low molecular interaction was observed using the XRD results of pure and blended samples. SEM images of samples with higher content of PLA illu- strated the homogeneous dispersion of PHB. Ring opening reaction of PMDA re- sulted in increasing the acidic number of samples which indicated the weak interac- tion with active group of polymers. It was observed no shit in IR peaks which indi- cated the incompatibility of these two polymers. Results shed light on the PMDA behavior in PLA/PHB blend which PMDA in spite of controlling the crystallinity behavior of the blend, cannot improve the compatibility and mixing. UR - https://www.biotechrep.ir/article_68967.html L1 - https://www.biotechrep.ir/article_68967_42cb76eeaad0b0496799f7e74ffaa574.pdf ER -