Thermal degradation and rheological behaviour of EVA/montmorillonite nanocomposites

被引：150

作者：

Riva, A

Zanetti, M

Braglia, M

Camino, G

Falqui, L

机构：

[1] CNR, IMAG, Ist Studi Chim Fis Macromol Sintet & Nat, I-16149 Genoa, Italy

[2] TILAB, I-10148 Turin, Italy

[3] Univ Turin, I-10125 Turin, Italy

来源：

POLYMER DEGRADATION AND STABILITY | 2002年 / 77卷 / 02期

关键词：

nanocomposite; EVA; montmorillonite; melt compounding; thermal degradation; rheology;

D O I：

10.1016/S0141-3910(02)00065-4

中图分类号：

O63 [高分子化学（高聚物）];

学科分类号：

070305 [高分子化学与物理]; 080501 [材料物理与化学]; 081704 [应用化学];

摘要：

The study is focused on the co-polymer poly(ethylene-co-vinylacetate) (EVA) used in telecommunication cable manufacturing. Different modified fillosilicates and EVA polymer were mixed at 120 degreesC in a Brabender mixer AEW330 in order to obtain polymer layered silicate nanocomposites(PLSN). Exfoliated nanocomposites were obtained with montmorillonite exchanged with methyl tallow bis(2-hydroxyethyl) ammonium and fluorohectorite exchanged with octadecylammonium, whereas with montmorillonite exchanged with dimethyl dehydrogenated tallow ammonium and fluorohectorite exchanged with amino dodecanoic acid an intercalated nanocomposite and a microcomposite were obtained respectively. It has been demonstrated that a low silicate percentage (10%) nanodispersed in the polymer matrix is capable of dramatically reducing the influence of oxygen during thermooxidation, and to substantially increase the storage modulus of the material. The acid catalysis of acetic acid elimination observed heating EVA nanocomposites in nitrogen is more effective in the case of exfoliated morphologies. (C) 2002 Elsevier Science Ltd. All rights reserved.

引用

页码：299 / 304

页数：6

共 15 条

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