期刊
POLYMER TESTING
卷 63, 期 -, 页码 73-83出版社
ELSEVIER SCI LTD
DOI: 10.1016/j.polymertesting.2017.07.012
关键词
Immiscible PP/PS blends; Clay; Eccentric rotor extruder; Continuous elongational flow; Exfoliation mechanism
资金
- Key Program of National Natural Science Foundation of China [51435005]
- National Natural Science Foundation of China [51505153]
- National Instrumentation Program [2012YQ230043]
- Natural Science Foundation of Guangdong Province, China [2016A030310429]
- Science and Technology Program of Guangzhou, China [201607010240]
- National Key Research and Development Program of China [2016YFB0302301]
The polypropylene (PP)/polystyrene (PS)/montmorillonite (MMT) blends were prepared by an innovative eccentric rotor extruder based on continuous elongational flow. Addition of MMT nanoparticles was found to reduce the PS droplet size and improve the compatibility of PP/PS. The MMT nanoparticles had clear intercalation and/or exfoliation structures and were located mostly at the interface of PP/PS. It was found that the intercalation and exfoliation of MMT was finished under the synergy of interfacial interaction and tensile deformation so that we called the mechanism as MMT exfoliation mechanism induced by synergy of interface and tensile deformation. The rheological analysis showed that incorporation of MMT led to an increase in complex viscosity to an optimum level (5 wt%), after which any further increase in MMT concentration decreased the complex viscosity. Moreover, the degree of crystallinity of blends was controlled by the heterogeneous nucleation effect of MMT and the inhibition effect of PS. (C) 2017 Elsevier Ltd. All rights reserved.
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