Radical functionalization of poly(butylene succinate-co-adipate): Effect of cinnamic co-agents on maleic anhydride grafting

Maleic anhydride (MAH), trans cinnamic acid (AcCin) and ethyl cinnamate (EtCin) were radically graft onto poly(butylene succinate-co-adipate) (PBSA). Samples were prepared in Brabender at 175 °C by addition of increasing amounts of MAH, AcCin, EtCin and their combinations, i.e. MAH/AcCin and MAH/EtC...

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Bibliographic Details
Published in:Polymer (Guilford) 2011-09, Vol.52 (21), p.4656-4663
Main Authors: Signori, Francesca, Badalassi, Marco, Bronco, Simona, Ciardelli, Francesco
Format: Article
Language:English
Subjects:
Applied sciences
Binary systems
cinnamic acid
cinnamic co-agent
Copolymerization
Exact sciences and technology
feeds
Functional biodegradable polyesters
Grafting
MAH grafting
Maleic anhydride
maleic anhydrides
Monomers
Organic polymers
Physicochemistry of polymers
polymers
Preparation, kinetics, thermodynamics, mechanism and catalysts
Radical grafting
Radicals
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Summary:Maleic anhydride (MAH), trans cinnamic acid (AcCin) and ethyl cinnamate (EtCin) were radically graft onto poly(butylene succinate-co-adipate) (PBSA). Samples were prepared in Brabender at 175 °C by addition of increasing amounts of MAH, AcCin, EtCin and their combinations, i.e. MAH/AcCin and MAH/EtCin, setting DCP content in the 0.2–0.6 wt% range. Monomer grafting was quantitatively determined by FT-IR. MAH grafting degrees (FDM) resulted up to 1 mol%. Conversely, AcCin grafting degrees (FDA) were found almost negligible in all cases. EtCin was found grafted in the 0.3–1.0 mol% range when the binary system MAH/EtCin was applied. Same MAH feeds returned almost doubled MAH grafting degrees (FDM) when AcCin was the stoichiometric co-agent, and even three times higher FDM when EtCin was the stoichiometric co-agent. On accounts of all the collected results, a kinetic model of the investigated systems is proposed. [Display omitted]
ISSN:0032-3861
1873-2291
DOI:10.1016/j.polymer.2011.08.045