Morphology Mapping of Nanoparticle-Filled Immiscible
Polymer Blends in Flow: The Existence of a Critical Ratio between
Nanoparticle Concentration and Droplet Concentration
Posted on 2018-09-21 - 08:13
The
delicate flow-induced morphology of immiscible polypropylene/polystyrene
blends in the presence of silica nanoparticles (NPs) is investigated
in a multiparameter space. The morphology map constructed based on
in situ morphology observation reveals that a critical ratio of NP
concentration to droplet concentration, which strongly depends on
the NP surface chemistries and the ratio of the NP concentration to
the droplet concentration, exists. Below or above the critical ratio,
the NPs display diverse effects on the morphology (promote or suppress
droplet coalescence). These results can be interpreted by the competition
between the bridging mechanism (acceleratory effect) and the enhanced
viscoelasticity (inhibitory effect) exerted by the NPs.
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Kong, Miqiu; Chen, Guangling; Xi, Shuting; Huang, Yajiang; Li, Guangxian (2018). Morphology Mapping of Nanoparticle-Filled Immiscible
Polymer Blends in Flow: The Existence of a Critical Ratio between
Nanoparticle Concentration and Droplet Concentration. ACS Publications. Collection. https://doi.org/10.1021/acsomega.7b02072
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