The functions of crystallizable ethylene-propylene copolymers in the formation of multiple phase morphology of high impact polypropylene

Cuiyan Tong, Yang Lan, Ye Chen, Yong Chen, Decai Yang, Xiaoniu Yang

Research output: Contribution to journalArticle

19 Citations (Scopus)

Abstract

The functions of crystallizable ethylene-propylene copolymers in the formation of multiple phase morphology of high impact polypropylene (hiPP) were studied by solvent extraction fractionation, transmission electron microscopy (TEM), selected area electron diffraction (SAED), nuclear magnetic resonance (13C-NMR), and selected reblending of different fractions of hiPP. The results indicate that hiPP contains, in addition to polypropylene (PP) and amorphous ethylene-propylene random copolymer (EPR) as well as a small amount of polyethylene (PE), a series of crystallizable ethylene-propylene copolymers. The crystallizable ethylene-propylene copolymers can be further divided into ethylene-propylene segmented copolymer (PE-s-PP) with a short sequence length of PE and PP segments, and ethylene-propylene block copolymer (PE-b-PP) with a long sequence length of PE and PP blocks. PE-s-PP and PE-b-PP participate differently in the formation of multilayered core-shell structure of the dispersed phase in hiPP. PE-s-PP (like PE) constructs inner core, PE-b-PP forms outer shell, while intermediate layer is resulted from EPR. The main reason of the different functions of the crystallizable ethylene-propylene copolymers is due to their different compatibility with the PP matrix.

Original languageEnglish (US)
Pages (from-to)1302-1309
Number of pages8
JournalJournal of Applied Polymer Science
Volume123
Issue number3
DOIs
StatePublished - Feb 5 2012

Fingerprint

Polypropylenes
Propylene
Ethylene
Copolymers
Polyethylene
Polyethylenes
ethylene
propylene
Nuclear magnetic resonance
Solvent extraction
Fractionation
Electron diffraction
Block copolymers

All Science Journal Classification (ASJC) codes

  • Chemistry(all)
  • Surfaces, Coatings and Films
  • Polymers and Plastics
  • Materials Chemistry

Cite this

Tong, Cuiyan ; Lan, Yang ; Chen, Ye ; Chen, Yong ; Yang, Decai ; Yang, Xiaoniu. / The functions of crystallizable ethylene-propylene copolymers in the formation of multiple phase morphology of high impact polypropylene. In: Journal of Applied Polymer Science. 2012 ; Vol. 123, No. 3. pp. 1302-1309.
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abstract = "The functions of crystallizable ethylene-propylene copolymers in the formation of multiple phase morphology of high impact polypropylene (hiPP) were studied by solvent extraction fractionation, transmission electron microscopy (TEM), selected area electron diffraction (SAED), nuclear magnetic resonance (13C-NMR), and selected reblending of different fractions of hiPP. The results indicate that hiPP contains, in addition to polypropylene (PP) and amorphous ethylene-propylene random copolymer (EPR) as well as a small amount of polyethylene (PE), a series of crystallizable ethylene-propylene copolymers. The crystallizable ethylene-propylene copolymers can be further divided into ethylene-propylene segmented copolymer (PE-s-PP) with a short sequence length of PE and PP segments, and ethylene-propylene block copolymer (PE-b-PP) with a long sequence length of PE and PP blocks. PE-s-PP and PE-b-PP participate differently in the formation of multilayered core-shell structure of the dispersed phase in hiPP. PE-s-PP (like PE) constructs inner core, PE-b-PP forms outer shell, while intermediate layer is resulted from EPR. The main reason of the different functions of the crystallizable ethylene-propylene copolymers is due to their different compatibility with the PP matrix.",
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The functions of crystallizable ethylene-propylene copolymers in the formation of multiple phase morphology of high impact polypropylene. / Tong, Cuiyan; Lan, Yang; Chen, Ye; Chen, Yong; Yang, Decai; Yang, Xiaoniu.

In: Journal of Applied Polymer Science, Vol. 123, No. 3, 05.02.2012, p. 1302-1309.

Research output: Contribution to journalArticle

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