Toughness decrease of PLA‐PHBHHx blend films upon surface‐confined photopolymerization
Abstract
The present research investigates the effect of photoinduced grafting reaction on the bulk properties of melt processed poly( L ‐lactic acid) (PLA)‐poly[(3‐hydroxybutyrate)‐ co ‐(3‐hydroxyhexanoate)] (PHBHHx) blend films. PLA‐PHBHHx blend films, comprising 10 wt % PHBHHx showed a remarkable toughness improvement. From dynamic mechanical analysis of melt processed PLA‐PHBHHx blend films, the blend appears to be noncompatible. Unfortunately, PLA‐PHBHHx blend films underwent rapid physical aging as characterized using differential scanning calorimetry, resulting in a significant toughness loss. Physically aged films regained the original toughness on annealing at 60°C for 30 min. Annealed PLA‐PHBHHx blend films also underwent physical aging leading to a significant toughness loss. Hydrophilic monomers like acrylic acid and acrylamide were successfully photopolymerized from the film surface using a sequential, two‐step photografting approach. The resultant films were characterized using water contact angle goniometry, ATR‐FTIR spectroscopy, and mechanical testing. PLA‐PHBHHx blend films lost their toughness significantly on surface modification and this was assigned to UV‐assisted solvent induced crystallization as characterized using wide‐angle X‐ray diffraction analyses. © 2008 Wiley Periodicals, Inc. J Biomed Mater Res, 2009
Integrity signals
Registry
Cites
Statistics
Claims the paper makes
Claims other papers make about this one
Each is checked against this paper’s own text: does it say what the citing paper says it does?
PLA tensile strength and elastic modulus are comparable to poly(ethylene terephthalate) (PET).
“Although its tensile strength and elastic modulus are comparable to poly(ethylene terephthalate) (PET) [17,18], the poor toughness limits its use in the applications that need plastic deformation at higher stress levels (e.g., screws and fracture fixation plates) [15].”
From Physical and mechanical properties of PLA, and their functions in widespread applications — A comprehensive review (2016) · cites this paper as [18]
Cites
Preparation and characterization of biodegradable PLA polymeric blends
Chen, C.-C., Chueh, J.-Y., Tseng, H., Huang, H.-M., & Lee, S.-Y. (2003) · Biomaterials · doi:10.1016/s0142-9612(02)00466-0 · Cited by 583 · see citing works
Ray, S. S., & Okamoto, M. (2003) · Macromolecular Rapid Communications · doi:10.1002/marc.200300008 · Cited by 454 · see citing works
Morphology and Properties of Soy Protein and Polylactide Blends
Zhang, J., Jiang, L., Zhu, L., Jane, J.-L., & Mungara, P. (2006) · Biomacromolecules · doi:10.1021/bm050888p · Cited by 176 · see citing works
Flagged first, then by citations
Cited by
Sorted by citations
Farah, S., Anderson, D. G., & Langer, R. (2016) · Advanced Drug Delivery Reviews · doi:10.1016/j.addr.2016.06.012 · Cited by 3,443 · see citing works
Poly(lactic acid) modifications
Rasal, R. M., Janorkar, A. V., & Hirt, D. E. (2010) · Progress in Polymer Science · doi:10.1016/j.progpolymsci.2009.12.003 · Cited by 2,204 · see citing works
Self-citationPoly (lactic acid) blends: Processing, properties and applications
Nofar, M., Sacligil, D., Carreau, P. J., Kamal, M. R., & Heuzey, M.-C. (2019) · International Journal of Biological Macromolecules · doi:10.1016/j.ijbiomac.2018.12.002 · Cited by 780 · see citing works
- Authors
- Rasal, R. M., & Hirt, D. E.
- Affiliations
- Clemson University (US)
- Corresponding author
- Hirt, Douglas E.
- Venue
- Journal of Biomedical Materials Research Part A
- Publisher
- Wiley
- Published
- 2008-04-21
- Volume
- 88A
- Issue
- 4
- Pages
- 1079-1086
- ISSN
- 1549-3296 (ISSN-L)
- 1552-4965
- OpenAlex
- W2135137470
- Cited by
- 120
- References
- 3
- Citations by year
- 2026: 3 · 2025: 7 · 2024: 5 · 2023: 14 · 2022: 11 · 2021: 7 · 2020: 6 · 2019: 10 · 2018: 7 · 2017: 12 · 2016: 8 · 2015: 8 · 2014: 2 · 2013: 4 · 2012: 6
- FWCI
- 1.43
- Type
- journal article
- Language
- en
- Open access
- closed
- Locations
- Journal of Biomedical Materials Research Part A (publishedVersion)
- PubMed (publishedVersion)
- Topics
- Physical Sciences › Materials Science › Biomaterials › biodegradable polymer synthesis and properties
- Physical Sciences › Materials Science › Polymers and Plastics › Polymer crystallization and properties
- Physical Sciences › Materials Science › Surfaces, Coatings and Films › Polymer Surface Interaction Studies
- Keywords
- poly(L-lactic acid), poly(3-hydroxybutyrate-co-3-hydroxyhexanoate), toughness loss, physical aging, acrylic acid, acrylamide, blend compatibility, annealing, hydrophilic surface modification, biodegradable polymer blends
- MeSH terms
- Polyhydroxybutyrates, Biocompatible Materials, Calorimetry, Differential Scanning, Caproates, Materials Testing, Polyesters, Polymers, Stress, Mechanical, Surface Properties, Thermogravimetry, Spectroscopy, Fourier Transform Infrared, Lactic Acid, 3-Hydroxybutyric Acid, Photochemical Processes
About these checks
Registry, retraction, Cites and statistics results are computed, not judged, with one exception: a printed reference that no index lists is read once by a model before it counts as a citation error. Claims are extracted by a model and kept only when their quote appears verbatim in the text; each cited source is then checked, with a model’s help, for whether it says what the claim relies on. Those verdicts can be wrong — read the claim’s quote and the cited source before relying on one.
Statistics and arithmetic are recomputed, not judged.
Confidence bands are shown only for fields calibrated on our annotated test set. None is calibrated yet, so no band is shown.
What counts as a claim ›How we measure confidence ›How we check this ›
Are you an author, or do you see a problem with this page? Request a review
