writer：Defeng Wu, Chixing Zhou, Fan Xie, Dalian Mao, Bian Zhang.
keywords：rheological behavior; thermal stability; PBT; epoxy resin; clay; nanocomposites.
source：期刊
specific source：Polymer Degradation & Stability
Issue time：2005年

Polymer Degradation & Stability

ABSTRACT: Epoxy resin was used as a compatilizer to prepare poly(butylene terephthalate)/clay nanocomposites (PCN) via melt intercalation. The morphology of PCN hybrids was investigated using XRD and TEM. The results reveal that with the addition of epoxy, the silicate are easy to be intercalated and presents a nice dispersion in the matrix. The linear viscoelastic behaviour of the nanocomposites was measured by the parallel plate rheometer. The ternary hybrids show a stronger solid-like response at terminal zone than that of the sample without epoxy. However, with the epoxy loading up to 6wt% and above, the loss modulus and high-frequency storage modulus for ternary hybrids decline. Thermogravimetric analysis shows that only the hybrids with lower epoxy loading (2-4wt%) present a higher thermal stability than that of the sample without epoxy, while with increasing in epoxy content, the thermal stability of the ternary nanocomposites declines somewhat. The compatilizer loadings do have influence on the performance of nanocomposites and, the best fitting compatilizer dosage, 4wt%, is decided by a new ‘crossover point’ rheological method.