Morphology Mapping of Nanoparticle-Filled Immiscible Polymer Blends in Flow: The Existence of a Critical Ratio between Nanoparticle Concentration and Droplet Concentration | Zendy

Miqiu Kong | Zendy; Guangling Chen | Zendy; Shuting Xi | Zendy; Yajiang Huang | Zendy; Guangxian Li | Zendy

Open Access

Morphology Mapping of Nanoparticle-Filled Immiscible Polymer Blends in Flow: The Existence of a Critical Ratio between Nanoparticle Concentration and Droplet Concentration

Author(s) -

Miqiu Kong,

Guangling Chen,

Shuting Xi,

Yajiang Huang,

Guangxian Li

Publication year - 2018

Publication title -

acs omega

Language(s) - English

Resource type - Journals

SCImago Journal Rank - 0.779

H-Index - 40

ISSN - 2470-1343

DOI - 10.1021/acsomega.7b02072

Subject(s) - morphology (biology) , coalescence (physics) , nanoparticle , chemical engineering , materials science , polystyrene , polymer blend , polymer , viscoelasticity , polypropylene , nanotechnology , composite material , copolymer , genetics , physics , astrobiology , engineering , biology

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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