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Abstract
ABSTRACTPoly(butylene succinate) (PBS) is a bio‐based polyester with applications from packaging to medical use. Despite its excellent properties, producing high‐quality PBS for packaging is challenging, often requiring chain extension. Microfibrillated cellulose (MFC), a byproduct of cellulose production, can reinforce PBS materials. This work investigated the in situ incorporation of untreated MFC during PBS synthesis. Chemical and mechanical analysis showed MFC reacted with succinic acid, forming PBS‐MFC gel fractions with poor solubility. MFC can consume carboxyl groups, reacting with growing PBS chains and affecting the stoichiometry and molar mass. Adding 4 wt% MFC modifies the resin's thermal and mechanical properties. Finally, using MFC as a filler requires careful control of stoichiometric feed conditions, particularly polyol concentrations, to achieve sufficiently high molar masses in the polymer matrix.
Published Version
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