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Organoclay polybutylene terephthalate nanocomposites using dual surfactant modified montmorillonite prepared by the masterbatch method

journal contribution
posted on 13.09.2016, 09:12 by Andrew R. McLauchlin, Xujin Bao, Feng Zhao
This paper reports the application of dual-surfactant, thermally stable organoclays (OC) to the production of poly(butylene terephthalate) (PBT) nanocomposites by the masterbatch method. A common failing of single surfactant organoclays is their thermal instability at high polymer processing temperatures, such as that used for PBT (235°C). This can be overcome by first modifying the clay mineral with a thermally stable surfactant such as aminopropyl-POSS (AP-POSS). In this study, sodium montmorillonite (Na+Mt) was sequentially modified with AP-POSS and ditallowdimethylammonium chloride by ion-exchange reaction to give dual-surfactant organoclay (OC). This dual surfactant clay mineral was then used to prepare masterbatches comprising 40% clay mineral intercalated with CBT polymerized by ring-opening polymerization. The masterbatches were then processed with PBT by melt compounding to give PBT-clay nanocomposites whose morphology was studied by XRD and TEM and mechanical properties were assessed by tensile testing. Spectral examination showed that the dual surfactant clay mineral was readily intercalated by PBT, while electron microscopy revealed that an intercalated/exfoliated micromorphology was achieved. The elastic modulus and tensile strength of PBT were increased by inclusion of dual-surfactant clay, while the reduction in elongation typically associated with nanoclay inclusion was mitigated by the dual surfactant clay. The possible antagonism of the catalyst used in the ring-opening polymerization and the reinforcing effect of the dual surfactant clay is also discussed.

Funding

Contract grant sponsor: UK Department of Trade and Industry/ Technology Strategy Board.

History

School

  • Aeronautical, Automotive, Chemical and Materials Engineering

Department

  • Materials

Published in

Applied Clay Science

Volume

53

Issue

4

Pages

749 - 753

Citation

MCLAUCHLIN, A., BAO, X. and ZHAO, F., 2011. Organoclay polybutylene terephthalate nanocomposites using dual surfactant modified montmorillonite prepared by the masterbatch method. Applied Clay Science, 53 (4), pp.749-753.

Publisher

© Elsevier

Version

VoR (Version of Record)

Publisher statement

This work is made available according to the conditions of the Creative Commons Attribution-NonCommercial-NoDerivatives 4.0 International (CC BY-NC-ND 4.0) licence. Full details of this licence are available at: https://creativecommons.org/licenses/by-nc-nd/4.0/

Publication date

2011

Notes

Closed access.

ISSN

0169-1317

Language

en

Exports