On modifying properties of polymeric melts by nanoscopic particles

Atılgan, Canan and İnanç, İbrahim and Atılgan, Ali Rana (2012) On modifying properties of polymeric melts by nanoscopic particles. Journal of Polymer Science Part B: Polymer Physics, 50 (23). pp. 1653-1662. ISSN 0887-6266 (Print) 1099-0488 (Online)

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We study geometric and energetic factors that partake in modifying properties of polymeric melts via inserting well-dispersed nanoscopic particles (NP). Model systems are cis-1,4-polybutadiene melts including a single atomic clusters of size varied in the range 10–150 atoms (3–7 A° in radius; 0.1–1.5% v/v). We modify the interactions between the chains and the particle by tuning attractive van der Waals interactions. Using molecular dynamics, we study equilibrium fluctuations and dynamical properties at the interface. The NPs move in the polymer matrix in two different regimes corresponding to trapped and free diffusion, depending on the NP size. Furthermore, degree of crowding around the NP by the polymer chains is quantified. Effect of NP size and interaction strength both on volume and volumetric fluctuations is manifested in mechanical properties, quantified here by bulk modulus, K. Tuning NP size and nonbonded interactions results in 15% enhancement in K by addition of a maximum of 1.5% v/v NP.
Item Type: Article
Uncontrolled Keywords: interaction parameter; interfaces; mechanical properties; molecular modeling; nanoparticles; polybutadiene; relaxation; structure-property relations; thermodynamics
Subjects: Q Science > QD Chemistry > QD450-801 Physical and theoretical chemistry
Q Science > QC Physics > QC310.15 Thermodynamics
Divisions: Faculty of Engineering and Natural Sciences > Academic programs > Materials Science & Eng.
Faculty of Engineering and Natural Sciences
Depositing User: Canan Atılgan
Date Deposited: 03 Dec 2012 11:38
Last Modified: 26 Apr 2022 09:00
URI: https://research.sabanciuniv.edu/id/eprint/20400

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