Considerations for the design of polymeric biodegradable products

• Type: Another Publication in an International Scientific Journal
• Date: 2013

Authors

Andre C Vieira (Author) Other; Rui M Guedes (Author) FEUP; Volnei Tita (Author) Other

Journal

Title: Journal of Polymer Engineering

Vol. 33

Pages: 293-302

ISSN: 0334-6447

Publisher: Walter De Gruyter

Indexing

ISI Web of Knowledge - 12 Citations

Scopus - 15 Citations

Scientific classification

FOS: Natural sciences > Chemical sciences

Other information

Authenticus ID: P-006-9DT

DOI: 10.1515/polyeng-2012-0150

Abstract (EN): Several biodegradable polymers are used in many products with short life cycles. The performance of a product is mostly conditioned by the materials selection and dimensioning. Strength, maximum strain and toughness will decrease along its degradation, and it should be enough for the predicted use. Biodegradable plastics can present short-term performances similar to conventional plastics. However, the mechanical behavior of biodegradable materials, along the degradation time, is still an unexplored subject. The maximum strength failure criteria, as a function of degradation time, have traditionally been modeled according to first order kinetics. In this work, hyperelastic constitutive models are discussed. An example of these is shown for a blend composed of poly(L-lactide) acid (PLLA) and polycaprolactone (PCL). A numerical approach using ABAQUS is presented, which can be extended to other 3D geometries. Thus, the material properties of the model proposed are automatically updated in correspondence to the degradation time, by means of a user material subroutine. The parameterization was achieved by fitting the theoretical curves with the experimental data of tensile tests made on a PLLA-PCL blend (90:10) for different degradation times. The results obtained by numerical simulations are compared to experimental data, showing a good correlation between both results.

Language: English

Type (Professor's evaluation): Scientific

No. of pages: 10