Effect of Reactive Organic Modifiers on Thermal/Mechanical Properties of Epoxy/Clay Nanocomposites

doi:10.11901/1005.3093.2019.403

Chinese Journal of Materials Research

2020, Vol. 34

Issue (3): 161-168 DOI: 10.11901/1005.3093.2019.403

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Effect of Reactive Organic Modifiers on Thermal/Mechanical Properties of Epoxy/Clay Nanocomposites

CHEN Bin¹(

),PEI Xinpeng¹,XU Yang¹,ZHANG Ying²(

)

1. School of Materials Science and Engineering, Shenyang University of Chemical Technology, Shenyang 110142, China
2. School of Applied Chemistry, Shenyang University of Chemical Technology, Shenyang 110142, China

Cite this article:

CHEN Bin,PEI Xinpeng,XU Yang,ZHANG Ying. Effect of Reactive Organic Modifiers on Thermal/Mechanical Properties of Epoxy/Clay Nanocomposites. Chinese Journal of Materials Research, 2020, 34(3): 161-168.

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Abstract

Two reactive organic modifiers were firstly synthesized by reaction of triglycidyl p-aminophenol (TGPAP) with bromo-n-butane (BB) and 2-bromoethanol (BE) respectively. By using the two modifiers, two different types of organic clays (B-Clay and E-Clay) with the same reactive functional groups but different in compatibility with epoxy were prepared. Epoxy/clay nanocomposites were then synthesized with the above two organoclay via "clay-slurry compounding method''. The effect of two reactive organic modifiers on the structure and thermal/mechanical properties of the nanocomposites was studied. It is shown that E-Clay gave a highly exfoliated structure in epoxy matrix because of its better compatible with epoxy pre-polymer, while B-Clay presented an exfoliated/intercalated mixed structure. Remarkable improvement in tensile strength and modulus were obtained for the nanocomposites due to the formation of strong interfacial bonding between epoxy matrix and clay layers, which derived from reactions of organic modifiers on the organoclay with curing agent during curing. For the nano-composite with incorporation of 3.0% clay, the tensile strength and modulus enhanced by 76.47% and 258% for E-Clay respectively, while that with B-Clay were 52.51% and 236.92%. Besides, the glass transition temperature (T_g) of the two type of nanocomposites was marginally improved relative to neat epoxy resin.

Key words: organic polymer materials epoxy clay nanocomposites interface mechanical properties

Received: 16 August 2019

ZTFLH:

TQ323.5

Fund: National Natural Science Foundation of China(20974064);the Doctoral Scientific Research Foundation of Liaoning Province(20170520152)

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	Bin CHEN
	Xinpeng PEI
	Yang XU
	Ying ZHANG

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https://www.cjmr.org/EN/10.11901/1005.3093.2019.403 OR https://www.cjmr.org/EN/Y2020/V34/I3/161

Fig.1 Scheme of synthesis of organic modifiers

Fig.2 FT-IR spectra of pristine, B-Clay and E-Clay

Fig.3 TGA curves of pristine clay, E-Clay and E-Clay-g-D230

Fig.4 TEM micrographs of epoxy/clay nanocomposites with 3.5% (mass fraction) clay loading (a) B-Clay; (b) E-Clay

Fig.5 XRD patterns of the two organoclays at different stages of the nanocomposites synthesis (A) B-Clay; (B) E-Clay

Fig.6 Stress-strain curves of pristine epoxy polymer and of epoxy/clay nanocomposites (a) Epoxy/B-Clay; (b) Epoxy/E-Clay

Table 1 Tensile and thermo-mechanical properties of neat epoxy polymer and epoxy/clay nanocomposites

Fig.7 tanδ versus temperature plots of pristine epoxy polymer and of its nanocomposites (a) epoxy/B-Clay, (b) epoxy/E-Clay

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