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Issue 104, 2016, Issue in Progress
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Double glass transitions in exfoliated poly(methyl methacrylate)/organically modified MgAl layered double hydroxide nanocomposites

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Abstract

A series of nanocomposites based on poly(methyl methacrylate) (PMMA) and organically modified MgAl layered double hydroxides (O-LDH) were synthesized via in situ polymerization. The modification of LDH by sodium dodecylbenzenesulfonate (SDBS) resulted in an enlarged interlayer distance and a nearly complete substitution of the original NO3 in LDH layers. The polymerization of methyl methacrylate led to a disorderly exfoliated LDH in the PMMA matrix. The results of dynamic mechanical analysis (DMA) showed that there were two tan δ peaks in the PMMA/O-LDH nanocomposites at low frequencies. And the second peak at about 80 °C higher than the main peak (glass transition of PMMA matrix) gradually disappeared with increasing frequency, corresponding to the glass transition of PMMA chains confined on the O-LDH surface. Both of the two peaks shifted to higher temperature with increasing heating rate due to the strain lag of the sample.

Graphical abstract: Double glass transitions in exfoliated poly(methyl methacrylate)/organically modified MgAl layered double hydroxide nanocomposites

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Publication details

The article was received on 13 Jun 2016, accepted on 11 Oct 2016 and first published on 12 Oct 2016


Article type: Paper
DOI: 10.1039/C6RA15172H
Citation: RSC Adv., 2016,6, 101941-101947
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    Double glass transitions in exfoliated poly(methyl methacrylate)/organically modified MgAl layered double hydroxide nanocomposites

    X. Li, L. Chen, Q. Li, J. Zhang, Z. Su, X. Zhang, K. Zheng and X. Tian, RSC Adv., 2016, 6, 101941
    DOI: 10.1039/C6RA15172H

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