Key Laboratory of Fine Chemical Engineering and Functional Materials; School of Chemical Engineering, Sichuan University, Chengdu 610065, China
Jiangwenwei@scu.edu.cn
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Zhang, C.; Liu, R.; Liu, J. Y.; Jiang, W. W. Impact of carbon chain structures in the backbone on the flexibility of modified polyarylene sulfide resins: molecular dynamics simulations and mesoscopic analysis. Chinese J. Polym. Sci. 2024, 42, 544–557
Chi Zhang, Rong Liu, Jing-Yuan Liu, et al. Impact of Carbon Chain Structures in the Backbone on the Flexibility of Modified Polyarylene Sulfide Resins: Molecular Dynamics Simulations and Mesoscopic Analysis. [J]. Chinese Journal of Polymer Science 42(4):544-557(2024)
Zhang, C.; Liu, R.; Liu, J. Y.; Jiang, W. W. Impact of carbon chain structures in the backbone on the flexibility of modified polyarylene sulfide resins: molecular dynamics simulations and mesoscopic analysis. Chinese J. Polym. Sci. 2024, 42, 544–557 DOI: 10.1007/s10118-024-3072-1.
Chi Zhang, Rong Liu, Jing-Yuan Liu, et al. Impact of Carbon Chain Structures in the Backbone on the Flexibility of Modified Polyarylene Sulfide Resins: Molecular Dynamics Simulations and Mesoscopic Analysis. [J]. Chinese Journal of Polymer Science 42(4):544-557(2024) DOI: 10.1007/s10118-024-3072-1.
Innovative introduction of hexyl long carbon chains and imide ring structures into Polyphenylene Sulfide addresses its flexibility and impact resistance shortcomings. Molecular dynamics simulations reveal that elongating carbon chains lowers the glass transition temperature (Tg) and elastic modulus while increasing tensile strength.
In the domain of high-performance engineering polymers
the enhancement of mechanical flexibility in poly(phenylene sulfide) (
PPS
) resins has long posed a significant challenge. A novel molecular structure
designated as
PP-He-IS
wherein imide rings and an aliphatic hexylene chain are covalently incorporated into the
PPS
backbone to enhance its flexibility
is introduced in this study. Molecular dynamics (MD) simulations are employed to systematically explore the effects of diversifying the backbone chain structures by substituting phenyl units with alkyl chains of varying lengths
referred to as
PP-A-IS
where "
A
" signifies the distinct intermediary alkyl chain configurations. Computational analyses reveal a discernable decrement in the glass transition temperature (
T
g
) and elastic modulus
counterbalanced by an increment in yield strength as the alkyl chain length is extended. Notably
the PP-He-IS variant is shown to exhibit superior yield strength while simultaneously maintaining reduced elastic modulus and
T
g
values
positioning it as an advantageous candidate for flexible
PPS
applications. Mesoscopic analyses further indicate that structures such as
PP-He-IS
PP-Pe-IS
and
PP-Bu-IS
manifest remarkable flexibility
attributable to the presence of freely rotatable carbon-carbon single bonds. Experimental validation confirms that a melting temperature of 504 K which is lower than that of conventional
PPS
and lower crystallinity are exhibited by
PP-He-IS
thereby affording enhanced processability without compromising inherent thermal stability. Novel insights into the strategic modification of
PPS
for mechanical flexibility are thus furnished by this study
which also accentuates the pivotal role played by molecular dynamics simulations in spearheading high-throughput investigations in polymer material modifications.
Molecular dynamics simulationsPolyarylene SulfideMain-chain modificationsFlexibilityAliphatic hexylene chain
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