Mechanical properties of attapulgite clay reinforced polyurethane shape-memory nanocomposites

Xu, Ben, Huang, Wei Min, Pei, Yu Tao, Chen, Zhen Guo, Kraft, Arno, Reuben, Robert, de Hosson, Jeff and Fu, Yong Qing (2009) Mechanical properties of attapulgite clay reinforced polyurethane shape-memory nanocomposites. European Polymer Journal, 45 (7). pp. 1904-1911. ISSN 0014-3057

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Nanocomposites based on attapulgite clay and shape-memory polyurethane were fabricated by mechanical mixing. The mechanical properties of samples were evaluated using a micro-indentation tester. The untreated commercial attapulgite clay resulted in a significant decrease in glass transition temperature and hardness of the nanocomposite due to the presence of moisture as well as the clay’s amorphous structure and surface hydroxyl groups. The attapulgite nanoparticles were heat-treated at 850 °C, which resulted in crystallization of the particles and formation of layered attapulgite structure. The hardness of the nanocomposites composed of the heat treated clay powder dramatically increased as a function of clay content, which is attributed to the homogeneous dispersion of the nanofillers in the polymer matrix and strong filler–polymer interactions. Shape recovery of indentations has been demonstrated upon heating.

Item Type: Article
Subjects: F200 Materials Science
H300 Mechanical Engineering
J500 Materials Technology not otherwise specified
Department: Faculties > Engineering and Environment > Mechanical and Construction Engineering
Depositing User: Bin Xu
Date Deposited: 06 Jun 2013 08:12
Last Modified: 13 Oct 2019 00:25

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