Evaluation of thermal properties and crystallinity in PHB-based systems - a DoE approach
Majerczak, Katarzyna and Liggat, John J. (2024) Evaluation of thermal properties and crystallinity in PHB-based systems - a DoE approach. Journal of Polymers and the Environment, 32 (9). pp. 4613-4632. ISSN 1572-8900 (https://doi.org/10.1007/s10924-024-03234-4)
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Abstract
Complex formulations based on poly(hydroxybutyrate) (PHB) and poly(hydroxybutyrate-co-valerate) (PHBV) were studied to statistically assess the effect of formulation (i.e., hydroxyvalerate (HV) content, plasticiser chemistry and content, filler type and content) on their thermal properties and degree of crystallinity (Xc). In binary systems, thermal properties were mainly influenced by filler type rather than its content, while for plasticised systems the changes were dependent on both increasing plasticiser content and PHB-plasticiser compatibility. Variations in HV content affected the ability of the polymer chain to fold, leading to significant changes in both thermal properties and Xc. In ternary systems, presence of multiple additives and consequent changes in intermolecular interactions lead to multifaceted behaviours that were not easily predicted by results from binary systems alone. For example, melting temperature did not show dependence on filler presence in PHBV systems despite introducing variations in pure PHB systems. In general, thermal properties and Xc are affected by all parameters studied, with changes in system free volume (i.e. changes in HV content and plasticisation) playing the most significant role. These results expand the understanding of factors controlling crystallisation in complex polymer systems and can be used to control matrix properties in new generations of packaging materials.
ORCID iDs
Majerczak, Katarzyna and Liggat, John J. ORCID: https://orcid.org/0000-0003-4460-5178;-
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Item type: Article ID code: 88620 Dates: DateEvent1 September 2024Published14 April 2024Published Online18 February 2024Accepted5 August 2023SubmittedSubjects: Science > Chemistry Department: Faculty of Science > Pure and Applied Chemistry
Strategic Research Themes > Society and Policy
Strategic Research Themes > Ocean, Air and Space
Strategic Research Themes > Measurement Science and Enabling Technologies
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Strategic Research Themes > Energy
Strategic Research Themes > Innovation Entrepreneurship
Strategic Research Themes > Advanced Manufacturing and MaterialsDepositing user: Pure Administrator Date deposited: 04 Apr 2024 15:54 Last modified: 25 Sep 2024 15:15 URI: https://strathprints.strath.ac.uk/id/eprint/88620