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      Morphology and Isothermal Crystallization Kinetics of Polypropylene/Poly(ethylene-co-vinyl alcohol) Blends

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          Abstract

          Polypropylene (PP)/poly(ethylene-co-vinyl alcohol) (EVOH) blends were prepared by melt blending using PP-g-MAH as a compatabilizer. The microstructure and rheological behavior of PP/EVOH blends were studied. The results showed the that EVOH particles were uniformly dispersed in the PP matrix and inhibited the mobility of PP chains. The isothermal crystallization kinetics and morphology development of PP/EVOH blends were compared with that of pure PP. It was found that the EVOH essentially acted as an effective nucleating agent for PP, which could significantly increase the nucleation rate because the EVOH molecules in PP/EVOH blends aggregated together to form interface. Therefore, the introduction of EVOH increased the overall rate of isothermal crystallization compared with pure PP, although the PP molecular chains would be hindered seriously if excessive amounts of EVOH were added. X-ray diffraction showed that pure PP and PP/EVOH blends exhibited an identical crystal structure, and the crystallinity of the PP phase in the blends was not significantly different from that of pure PP.

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          Most cited references 27

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          Regime III crystallization in melt-crystallized polymers: The variable cluster model of chain folding

           John Hoffman (1983)
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            Crystallization behaviour of poly(ether-ether-ketone)

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              X‐Ray Study of Isothermal Thickening of Lamellae in Bulk Polyethylene at the Crystallization Temperature

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                Author and article information

                Journal
                ipp
                International Polymer Processing
                Carl Hanser Verlag
                0930-777X
                2195-8602
                29 April 2019
                : 34
                : 2
                : 195-208
                Affiliations
                1 Department of Polymer Material and Engineering, College of Materials and Metallurgy, Guizhou University, Guiyang, PRC
                2 National Engineering Research Center for Compounding and Modification of Polymeric Materials, Guiyang, PRC
                Author notes
                [* ] Correspondence address, Mail address: Shuhao Qin, National Engineering Research Center for Compounding and Modification of Polymeric Materials, Guiyang 550014, PRC, E-mail: caiyuanzhangting@ 123456126.com
                Article
                IPP3589
                10.3139/217.3589
                © 2019, Carl Hanser Verlag, Munich
                Page count
                References: 35, Pages: 14
                Product
                Self URI (journal page): http://www.hanser-elibrary.com/loi/ipp
                Categories
                Regular Contributed Articles

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