Molecular mechanics simulation on the nanoindentation on POSS nanocomposite

Fanlin Zeng; Yi Sun; Yu Zhou; Jun Li

doi:10.1117/12.779826

1 November 2007 Molecular mechanics simulation on the nanoindentation on POSS nanocomposite

Fanlin Zeng, Yi Sun, Yu Zhou, Jun Li

Proceedings Volume 6423, International Conference on Smart Materials and Nanotechnology in Engineering; 642322 (2007) https://doi.org/10.1117/12.779826
Event: International Conference on Smart Materials and Nanotechnology in Engineering, 2007, Harbin, China

Abstract

Mechanical behaviors of the nanoindentation into the films of the polystyrene (PS) and the polyhedral oligomeric silsesquioxane (POSS) reinforced PS (propyl-POSS-PS, P-POSS-PS) were studied using the molecular mechanics simulations. The serrated load-displacement curves of two kinds of polymers were obtained. And the curves show that the loads increase with increasing displacements. A method to compute the hardness of homopolymers in the molecular simulations of the nanoindentation was proposed by considering the response of the load-indentation depth and the constructional deformations of the simulation models. The results indicate that the hardness of the P-POSS-PS (9.1mol% propyl-POSS attached) is about 60% higher than that of the PS. The hardness of polymers can be observably improved by the POSS. A formula is deduced to characterize the relationship between the hardness and the indentation depth of common polymeric materials based on a kind of representative polymer nylon. Computational results prove that this formula is valid to a large proportional of polymers. Afterward the hardness of the PS and the P-POSS-PS were corrected and the necessary indentation depths for the credible hardness were provided.

Citation Download Citation

Fanlin Zeng, Yi Sun, Yu Zhou, and Jun Li "Molecular mechanics simulation on the nanoindentation on POSS nanocomposite", Proc. SPIE 6423, International Conference on Smart Materials and Nanotechnology in Engineering, 642322 (1 November 2007); https://doi.org/10.1117/12.779826

ACCESS THE FULL ARTICLE

INSTITUTIONAL
Select your institution to access the SPIE Digital Library.

SELECT YOUR INSTITUTION

PERSONAL
Sign in with your SPIE account to access your personal subscriptions or to use specific features such as save to my library, sign up for alerts, save searches, etc.

PERSONAL SIGN IN

No SPIE Account? Create one

PURCHASE THIS CONTENT

SUBSCRIBE TO DIGITAL LIBRARY

50 downloads per 1-year subscription

Members: $195

Non-members: $335 ADD TO CART

25 downloads per 1 - year subscription

Members: $145

Non-members: $250 ADD TO CART

PURCHASE SINGLE ARTICLE

Includes PDF, HTML & Video, when available