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Structure and mechanical properties of polycarbonate modified clay nanocomposites.
J Nanosci Nanotechnol. 2008 Apr; 8(4):1880-5.JN

Abstract

Polycarbonate (PC)/modified clay nanocomposites were prepared, in the absence and presence of different amounts of maleic anhydride grafted polypropylene (PP-g-MA), by direct melt blending. Their structures, as well as mechanical, morphological and thermal properties, were characterized by X-ray diffractometry (XRD), tensile testing, transmission electron microscopy (TEM), and thermogravimetric analysis (TGA). The XRD results of the PC/clay nanocomposites showed that they had intercalated structures, although some exfoliation was visible at low clay contents, that the gallery heights of the PC/clay nanocomposites were almost the same, and that some of the clay layers collapsed as a result of modifier decomposition at the high processing temperature. The XRD patterns of the PC/PP-g-MA/clay nanocomposites clearly show less intercalation and more exfoliation with increasing PP-g-MA content. These results were supported by TEM observations. Both the tensile strength and modulus show substantial improvements with both increasing clay and PP-g-MA contents, while the elongation at break substantially decreases, although the presence of PP-g-MA somewhat improves these values. All the nanocomposites have lower thermal stability than pure PC, but the presence of PP-g-MA seems to improve the thermal stability of these samples.

Authors+Show Affiliations

Guduri BR
Department of Chemistry, University of the Free State (Qwaqwa Campus), Private Bag X13, Phuthaditjhaha 9866, South Africa.
Luyt AS
No affiliation info available

MeSH

Aluminum SilicatesClayCrystallizationElasticityMacromolecular SubstancesMaterials TestingMolecular ConformationNanostructuresNanotechnologyParticle SizePolycarboxylate CementSurface PropertiesTensile Strength

Pub Type(s)

Journal Article
Research Support, Non-U.S. Gov't

Language

eng

PubMed ID

18572589

Citation

Guduri, Babu R., and Adriaan S. Luyt. "Structure and Mechanical Properties of Polycarbonate Modified Clay Nanocomposites." Journal of Nanoscience and Nanotechnology, vol. 8, no. 4, 2008, pp. 1880-5.
Guduri BR, Luyt AS. Structure and mechanical properties of polycarbonate modified clay nanocomposites. J Nanosci Nanotechnol. 2008;8(4):1880-5.
Guduri, B. R., & Luyt, A. S. (2008). Structure and mechanical properties of polycarbonate modified clay nanocomposites. Journal of Nanoscience and Nanotechnology, 8(4), 1880-5.
Guduri BR, Luyt AS. Structure and Mechanical Properties of Polycarbonate Modified Clay Nanocomposites. J Nanosci Nanotechnol. 2008;8(4):1880-5. PubMed PMID: 18572589.
* Article titles in AMA citation format should be in sentence-case
TY - JOUR T1 - Structure and mechanical properties of polycarbonate modified clay nanocomposites. AU - Guduri,Babu R, AU - Luyt,Adriaan S, PY - 2008/6/25/pubmed PY - 2008/7/23/medline PY - 2008/6/25/entrez SP - 1880 EP - 5 JF - Journal of nanoscience and nanotechnology JO - J Nanosci Nanotechnol VL - 8 IS - 4 N2 - Polycarbonate (PC)/modified clay nanocomposites were prepared, in the absence and presence of different amounts of maleic anhydride grafted polypropylene (PP-g-MA), by direct melt blending. Their structures, as well as mechanical, morphological and thermal properties, were characterized by X-ray diffractometry (XRD), tensile testing, transmission electron microscopy (TEM), and thermogravimetric analysis (TGA). The XRD results of the PC/clay nanocomposites showed that they had intercalated structures, although some exfoliation was visible at low clay contents, that the gallery heights of the PC/clay nanocomposites were almost the same, and that some of the clay layers collapsed as a result of modifier decomposition at the high processing temperature. The XRD patterns of the PC/PP-g-MA/clay nanocomposites clearly show less intercalation and more exfoliation with increasing PP-g-MA content. These results were supported by TEM observations. Both the tensile strength and modulus show substantial improvements with both increasing clay and PP-g-MA contents, while the elongation at break substantially decreases, although the presence of PP-g-MA somewhat improves these values. All the nanocomposites have lower thermal stability than pure PC, but the presence of PP-g-MA seems to improve the thermal stability of these samples. SN - 1533-4880 UR - https://www.unboundmedicine.com/medline/citation/18572589/Structure_and_mechanical_properties_of_polycarbonate_modified_clay_nanocomposites_ DB - PRIME DP - Unbound Medicine ER -