Enhanced strength and toughness of polylactic acid by blending with modified natural rubber having acetate pendant group

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dc.authorid0000-0002-3361-6528
dc.authorid0000-0001-6049-3837
dc.contributor.authorOzbay, Ceren
dc.contributor.authorGumus, Omer Yunus
dc.date.accessioned2026-02-12T21:04:51Z
dc.date.available2026-02-12T21:04:51Z
dc.date.issued2023
dc.departmentBursa Teknik Üniversitesi
dc.description.abstractAmong biobased and biodegradable polymers, polylactic acid (PLA) is most widely used one. However, its poor mechanical properties need to be enhanced. In this study, PLA blend film with improved mechanical properties were developed without compromising any bio-content. For this, natural rubber derivative with acetate pendant group (ANR) and PLA blend films were prepared. First, natural rubber was epoxidized, and then partial acetylation was achieved by the ring-opening reaction of the epoxy groups. The epoxidation and the acetylation were examined by FTIR analysis. H-1-NMR spectrum revealed a 29% epoxidation and 8.25% acetylation degree. The T-g of natural rubber (-66 degrees C) increased to -41 degrees C and -31 degrees C after epoxidation and acetylation, respectively. The compatibility of ENR and ANR with PLA was evident from the DSC results and Molau test. The morphology of PLA blend film containing 25 wt% of ANR (ANR25) was observed as well-dispersed fine droplets by SEM images. The tensile strength, elastic modulus, and yield strength of ANR25 were measured as 11.6 MPa, 397.3 MPa, and 6.9 MPa, respectively. These values are considerably higher than neat PLA film. Compared to reported studies on PLA toughening so far, increments in both the strength and elongation of ANR25 were observed by tensile tests. Moreover, highest toughness among all samples was determined as 18.8 MJm(-3) for ANR25, which is 1.8 times higher than neat PLA. Thus, a strong and tough bio-based PLA blend was developed for film application such as packaging and sheeting.
dc.description.sponsorshipBursa Technical University Scientific Research [172L21]
dc.description.sponsorshipThe author(s) received no financial support for the research, authorship, and/or publication of this article: This work was supported by Bursa Technical University Scientific Research Projects Unit (Project No: 172L21).
dc.identifier.doi10.1177/00952443231166143
dc.identifier.endpage676
dc.identifier.issn0095-2443
dc.identifier.issn1530-8006
dc.identifier.issue5
dc.identifier.scopus2-s2.0-85150874351
dc.identifier.scopusqualityQ3
dc.identifier.startpage653
dc.identifier.urihttps://doi.org/10.1177/00952443231166143
dc.identifier.urihttps://hdl.handle.net/20.500.12885/6681
dc.identifier.volume55
dc.identifier.wosWOS:000953671300001
dc.identifier.wosqualityQ4
dc.indekslendigikaynakWeb of Science
dc.indekslendigikaynakScopus
dc.language.isoen
dc.publisherSage Publications Ltd
dc.relation.ispartofJournal of Elastomers and Plastics
dc.relation.publicationcategoryMakale - Uluslararası Hakemli Dergi - Kurum Öğretim Elemanı
dc.rightsinfo:eu-repo/semantics/closedAccess
dc.snmzKA_WoS_20260212
dc.subjectBiopolymers
dc.subjectpolylactic acid
dc.subjectnatural rubber
dc.subjectpolymer modification
dc.subjecttoughness
dc.titleEnhanced strength and toughness of polylactic acid by blending with modified natural rubber having acetate pendant group
dc.typeArticle

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