Preparation and Properties Characterization of EVA/Organic Modified Rectorite Composite Foaming Materials

doi:10.19491/j.issn.1001-9278.2020.09.008

Abstract

Abstract:

The organic modified rectorite (OREC) was prepared with dodecyl trimethyl ammonium bromide, and then the EVA/OREC composite foaming materials were prepared by a melting intercalation technology. The morphology and mechanical properties of the composites were investigated by FTIR spectroscopy, X-Ray diffraction, scanning electron microscopy and universal testing machine. The effects of interlayer spacing and content of rectorite on the mechanical properties of the composite were investigated. The results indicated that the interlayer spacing of rectorite increased by 10.9 % after organic modification, and the tensile strength, elongation at break, tear strength of the composite foaming materials were enhanced significantly. The composite foaming materials achieved the optimum mechanical properties at the OREC content of 1.8 %.

Key words: ethylene-vinyl acetate copolymer, rectorite, organic modification, composite, foaming materials

CLC Number:

TQ325.5

HONG Xiansheng, QIU Hongfeng, HUANG Mian, ZHENG Yuying. Preparation and Properties Characterization of EVA/Organic Modified Rectorite Composite Foaming Materials[J]. China Plastics, 2020, 34(9): 46-50.

Figures/Tables 6

Fig.1. FTIR spectrum of REC and OREC

Fig.2. XRD spectrum of REC and OREC

Fig.3. Density of the foamed composites

Fig.4. Tensile strength，elongation at break and tear strength of the foamed composites

Fig.5. SEM images of EVA composites with different comosition

m_EVA∶m_REC	发泡倍率	泡孔密度/个?cm^-3
100∶0	6.41	4.22×10¹⁵
90∶10	7.40	2.87×10¹⁶
90∶10	7.64	1.70×10¹⁶
80∶20	8.40	9.40×10¹⁵
80∶20	7.55	2.73×10¹⁶

Tab.1. Foaming ratio and cell density of composite foam materials with different formulation components

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