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  • 1.
    Nejstroem, Malin
    et al.
    Mid Sweden Univ, FSCN, Surface & Colloid Engn, S-85170 Sundsvall, Sweden.;Nouryon, S-85467 Sundsvall, Sweden..
    Andreasson, Bo
    Nouryon, S-85467 Sundsvall, Sweden..
    Sjölund, Johanna
    KTH, School of Engineering Sciences in Chemistry, Biotechnology and Health (CBH), Fibre- and Polymer Technology, Fibre Technology.
    Eivazi, Alireza
    Mid Sweden Univ, FSCN, Surface & Colloid Engn, S-85170 Sundsvall, Sweden..
    Svanedal, Ida
    Mid Sweden Univ, FSCN, Surface & Colloid Engn, S-85170 Sundsvall, Sweden..
    Edlund, Hakan
    Mid Sweden Univ, FSCN, Surface & Colloid Engn, S-85170 Sundsvall, Sweden..
    Norgren, Magnus
    Mid Sweden Univ, FSCN, Surface & Colloid Engn, S-85170 Sundsvall, Sweden..
    On Structural and Molecular Order in Cellulose Acetate Butyrate Films2023In: Polymers, E-ISSN 2073-4360, Vol. 15, no 9, article id 2205Article in journal (Refereed)
    Abstract [en]

    Cellulose acetate butyrate (CAB) is a possible candidate, being a raw material derived from renewable resources, to replace fossil-based materials. This is due to its thermoplastic properties and the relative ease with which it could be implemented within the existing industry. With a significant amount of variation in CAB on the market today, a knowledge gap has been identified regarding the understanding of the polymer structural arrangement in films. This relates to the underlying mechanisms that regulate CAB film material properties, insights that are important in product development. In this study, commercially available CAB was investigated with XRD, SEM, AFM, and TOPEM DSC in order to obtain physicochemical information related to its micro-structural features in solvent-cast films. The film-forming ability relates mostly to the number of hydroxyl groups, and the semi-crystallinity of the films depends on the type and position of the side groups along the cellulose backbone. The appearance of signs of possible cholesteric ordering in the films could be connected to higher amounts of hydroxyl groups along the backbone that disturb the helix arrangement, while the overall order was primarily related to the butyrate substitution and secondarily related to the molecular weight of the particular CAB studied. Cold crystallization was also observed in one CAB sample.

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