Macromolecular Materials and Engineering

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Influence of Boehmite Nanoparticle Loading on the Mechanical, Thermal, and Rheological Properties of Biodegradable Polylactide/Poly(ϵ-caprolactone) Blends

Stephen C. Agwuncha

DST/CSIR National Centre for Nanostructured Materials, Council for Scientific and Industrial Research, Pretoria, 0001 South Africa

Division of Polymer Technology, Department of Chemical, Metallurgical, Material Engineering, Tshwane University of Technology, Pretoria 0001 South Africa

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Suprakas Sinha Ray,

Corresponding Author

Suprakas Sinha Ray

[email protected]
| Fax: +27 12 841 2229

DST/CSIR National Centre for Nanostructured Materials, Council for Scientific and Industrial Research, Pretoria, 0001 South Africa

Department of Applied Chemistry, University of Johannesburg, Doornfontein, 2028 Johannesburg, South Africa

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Jarugala Jayaramudu,

Jarugala Jayaramudu

DST/CSIR National Centre for Nanostructured Materials, Council for Scientific and Industrial Research, Pretoria, 0001 South Africa

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Caroline Khoathane,

Caroline Khoathane

Division of Polymer Technology, Department of Chemical, Metallurgical, Material Engineering, Tshwane University of Technology, Pretoria 0001 South Africa

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Rotimi Sadiku,

Rotimi Sadiku

Division of Polymer Technology, Department of Chemical, Metallurgical, Material Engineering, Tshwane University of Technology, Pretoria 0001 South Africa

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Stephen C. Agwuncha,

Stephen C. Agwuncha

DST/CSIR National Centre for Nanostructured Materials, Council for Scientific and Industrial Research, Pretoria, 0001 South Africa

Division of Polymer Technology, Department of Chemical, Metallurgical, Material Engineering, Tshwane University of Technology, Pretoria 0001 South Africa

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Suprakas Sinha Ray,

Corresponding Author

Suprakas Sinha Ray

[email protected]
| Fax: +27 12 841 2229

DST/CSIR National Centre for Nanostructured Materials, Council for Scientific and Industrial Research, Pretoria, 0001 South Africa

Department of Applied Chemistry, University of Johannesburg, Doornfontein, 2028 Johannesburg, South Africa

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Jarugala Jayaramudu,

Jarugala Jayaramudu

DST/CSIR National Centre for Nanostructured Materials, Council for Scientific and Industrial Research, Pretoria, 0001 South Africa

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Caroline Khoathane,

Caroline Khoathane

Division of Polymer Technology, Department of Chemical, Metallurgical, Material Engineering, Tshwane University of Technology, Pretoria 0001 South Africa

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Rotimi Sadiku,

Rotimi Sadiku

Division of Polymer Technology, Department of Chemical, Metallurgical, Material Engineering, Tshwane University of Technology, Pretoria 0001 South Africa

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First published: 07 November 2014

https://doi.org/10.1002/mame.201400212

Citations: 38

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Abstract

Blends of polylactide (PLA) and poly(ϵ-caprolactone) (PCL) were melt-processed with boehmite (BAI) nanoparticles to produce ternary biocomposites with the intent of broadening the potential applications of PLA. The mechanical properties of the prepared composites exhibited remarkable improvement in the elongation-at-break of between 60 and 430% for increasing loadings of PCL and BAI in the blends. Furthermore, the melting temperatures of PLA and PCL were observed to shift approximately 2 °C toward each other in the composites, an indication of improved compatibility. This partial compatibility was also observed from the electron microscopy images, which also revealed a good dispersion of PCL in the PLA. The composite with balanced properties was found to be consisting of 70 wt% PLA, 30 wt% PCL, and 4 wt% BAI. mame201400212-gra-0001

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Figure S1. Plot of dynamic storage modulus (G′) and dynamic loss modulus (G″) of selected samples from 70/30 group as indicated on each plot.

Figure S2. The formation of PLA crystals in the neat PLA polymer with respect to treatment condition, A is melt-quenched while B, C and D were isothermally held at 115, 120 and 125^oC, respectively for 80 min.

Figure S3. POM images showing the effect of change in the isothermal temperature on the rate and number of crystals formed with respect to the amount of BAI added. The three columns represent 0%, 2% and 4% BAI additions in group 70/30 respectively from the left.

Figure S4. Dynamic time sweep data for the neat PLA, PCL, 70/30 blend and 70/30/4 composite samples.

Figure S5. ART-FTIR results for neat PLA, neat PCL, 70/30/0, 70/30/2, 70/30/4, 70/30/6, 60/40/0, and 60/40/4 from top, respectively.

Table S1. XRD results showing the peak angles and calculated % crystallinity for major peaks in each sample

Table S2. DSC data for all samples.

Please note: The publisher is not responsible for the content or functionality of any supporting information supplied by the authors. Any queries (other than missing content) should be directed to the corresponding author for the article.

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Volume300, Issue1

January 2015

Pages 31-47

Influence of Boehmite Nanoparticle Loading on the Mechanical, Thermal, and Rheological Properties of Biodegradable Polylactide/Poly(ϵ-caprolactone) Blends

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Influence of Boehmite Nanoparticle Loading on the Mechanical, Thermal, and Rheological Properties of Biodegradable Polylactide/Poly(ϵ-caprolactone) Blends

Abstract

Supporting Information

References

Citing Literature

References

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