2017
DOI: 10.1002/polb.24324
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Correspondence between the rigid amorphous fraction and nanoconfinement effects on glass formation

Abstract: Semicrystalline polymers' properties are strongly influenced by the presence of a "rigid amorphous fraction" (RAF) of material with enhanced glass transition temperature and suppressed mobility. Here, we review striking similarities between this domain and near-interface regions of altered dynamics in other nanostructured polymers, including thin films, nanocomposites, layered films, and ionomers. Building on these observations, we present results of molecular simulations of model nanolayered polymers in which… Show more

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Cited by 26 publications
(23 citation statements)
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References 124 publications
(195 reference statements)
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“…The RAF has been discovered in almost all semicrystalline polymers, as well as in a large array of interfacially‐rich polymeric systems that exhibit alterations in dynamics and glass formation behavior . This large array includes nanolayered polymers, block copolymers, as well as polymer nanocomposites .…”
Section: Introductionmentioning
confidence: 99%
See 2 more Smart Citations
“…The RAF has been discovered in almost all semicrystalline polymers, as well as in a large array of interfacially‐rich polymeric systems that exhibit alterations in dynamics and glass formation behavior . This large array includes nanolayered polymers, block copolymers, as well as polymer nanocomposites .…”
Section: Introductionmentioning
confidence: 99%
“…The RAF has been discovered in almost all semicrystalline polymers, [1] as well as in a large array of interfacially-rich polymeric systems that exhibit alterations in dynamics and glass formation behavior. [3,4] This large array includes nanolayered polymers, [5][6][7] block copolymers, [8,9] as well as polymer nanocomposites. [10][11][12][13][14][15][16][17][18] Like the RAF of semicrystalline polymers, all these systems exhibit evidence of a domain near internal or external interfaces in which dynamics and glass formation behavior are profoundly altered.…”
Section: Introductionmentioning
confidence: 99%
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“…TEM analysis suggests clay tactoids have aspect ratios around 2‐2.4. Based on the Halpin‐Tsai (HT) Model's prediction , these aspect ratio values can give rise to a nominal 1.08% increase in Young's modulus. Our results are in rough agreement with this prediction.…”
Section: Resultsmentioning
confidence: 99%
“…First, it has long been known that interfacial interactions between amorphous and crystalline domains in semicrystalline polymers can induce the formation of a “rigid amorphous fraction” of amorphous material with suppressed dynamics . Simulation results indicate that this effect is likely physically equivalent to alterations in dynamics near nanoparticles and in thin films . Second, as discussed above the nanofillers can also induce spatially varying alterations in dynamics.…”
Section: Introductionmentioning
confidence: 91%