NOTICE: Due to a lapse in annual appropriations, most of this website is not being updated. Learn more.

Form submissions will still be accepted but will not receive responses at this time. Sections of this site for programs using non-appropriated funds (such as NVLAP) or those that are excepted from the shutdown (such as CHIPS and NVD) will continue to be updated.

U.S. flag

An official website of the United States government

Official websites use .gov
A .gov website belongs to an official government organization in the United States.

Secure .gov websites use HTTPS
A lock ( ) or https:// means you’ve safely connected to the .gov website. Share sensitive information only on official, secure websites.

PUBLICATIONS

Tuning Polymer Melt Fragility With Antiplasticizer Additives

Published

Author(s)

Robert A. Riggleman, Jack F. Douglas, J J. de Pablo

Abstract

A polymer-diluent model exhibiting antiplasticization has beendeveloped and characterized by molecular dynamics simulations. Antiplasticizer molecules are shown to decrease the glass transition temperature Tg, but to increase the elastic moduli of the polymeric material. The addition of antiplasticizing particles renders the polymer melt a stronger glass-forming material through various characteristic temperatures, the fragility parameter D from fits to the VFTH equation, and through the observation of the temperature dependence of the size of cooperatively rearranging regions (strings) in each system. The length of the strings exhibits a weaker temperature dependence in the antiplasticized glass-forming system than in the more fragile pure polymer, consistent with the Adam-Gibbs model of glass formation.Upon cooling, the strings become increasingly concentrated in the antiplasticizer particles. Finally, we discuss several structuralindicators of cooperative dynamics, and find that that the dynamic propensity gives a strong correlation with the mobility in eachsystem.
Citation
Journal of Chemical Physics
Volume
126
Pub Type
Journals

Download Paper

Local Download

Keywords

antiplasticer additives, film imprinting, fragility, glass transition, nanoparticles, polymer melt, shear modulus, voronoi volume
Polymers and Materials

Citation

Riggleman, R. , Douglas, J. and de Pablo, J. (2007), Tuning Polymer Melt Fragility With Antiplasticizer Additives, Journal of Chemical Physics, [online], https://tsapps.nist.gov/publication/get_pdf.cfm?pub_id=852717 (Accessed October 11, 2025)

Issues

If you have any questions about this publication or are having problems accessing it, please contact [email protected].

Created June 18, 2007, Updated October 12, 2021
Was this page helpful?