Effect of chain architecture on biaxial orientation and oxygen permeability of polypropylene film

Dias, P.; Yuan, Li-Yan; Hiltner, A.; Baer, E.; Chen, H. Y.; Chum, S. P.

doi:10.1002/app.27197

Cited by 16 publications

(10 citation statements)

References 16 publications

(20 reference statements)

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“…Stretching at lower temperatures resulted in void formation in the case of composite films. With increasing temperature, the stress response decreased as more crystals melted [17]. An optimum balance in stress response and orientation was achieved for the composites at 155 C. The film was preheated at 155 C for 60 s and stretched at a strain rate of 400% s À1 or 5% s À1 .…”

Section: Biaxial Orientationmentioning

confidence: 99%

Biaxially oriented poly(propylene-g-maleic anhydride)/phosphate glass composite films for high gas barrier applications

Gupta¹,

Yuan²,

Deans³

et al. 2009

Polymer

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Section: Biaxial Orientationmentioning

confidence: 99%

Biaxially oriented poly(propylene-g-maleic anhydride)/phosphate glass composite films for high gas barrier applications

Gupta¹,

Yuan²,

Deans³

et al. 2009

Polymer

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“…Several studies have focused on the effect of processing conditions or further treatment on the structure of PP films . The change and relationships of structure, surface morphology, and properties of biaxially oriented films or blown films are also widely discussed .…”

Section: Introductionmentioning

confidence: 99%

Influences of processing on the phase transition and crystallization of polypropylene cast films

Zhang

et al. 2014

J of Applied Polymer Sci

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Phase transition and changes of properties of isotactic polypropylene (i‐PP) cast films with the processing conditions have been investigated by wide‐angle X‐ray diffraction, two‐dimensional small‐angle X‐ray scattering, and atomic force microscopy. It was found that chill roll temperature was a major factor, which influenced the formation of mesomorphic phase and its transition to spherulitic structure. Only mesomorphic phase was observed in the films produced under a chill roll temperature of below 40°C. When the roll temperature was increased to 60°C, mesomorphic phase coexisted with spherulitic crystal structure, and totally transformed to monoclinic structure at the roll temperature of 80°C. Differential scanning calorimetry, tensile, and optical tests were also performed on the films. The results showed that the observed structure changes were closely related to the thermal behavior, tensile, and optical properties of the PP films. The influence of die temperature on the films was also discussed, but the effect was much less than chill roll temperature. © 2014 Wiley Periodicals, Inc. J. Appl. Polym. Sci. 2014, 131, 41100.

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“…The biaxial stretching of the material either in one single step or sequentially is a fundamental step in the production of polypropylene films for packaging applications. Orientation of polypropylene involves a morphological transformation of spherulites into a network of microfibrils and reduces the gas permeability of polypropylene 13–15…”

Section: Introductionmentioning

confidence: 99%

Influence of incorporation of ZnO nanoparticles and biaxial orientation on mechanical and oxygen barrier properties of polypropylene films for food packaging applications

Lepot

Bael

Rul

et al. 2010

J of Applied Polymer Sci

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In this work, the effect of zinc oxide (ZnO) concentration and shape on processing and properties of new biaxially oriented polypropylene (BOPP)-ZnO nanocomposites was studied. The use of spherical nanoparticles and nanorods was expected to differently influence the properties of the final material. Films of isotactic polypropylene prepared with different ZnO incorporation were biaxially oriented under conditions of temperature and strain rate that were similar to those encountered in a commercial film process. Scanning electron microscopy analysis was performed to visualize the dispersion degree of the ZnO nanoparticles in the polymer matrix and to observe the surface and the orientation of the elongated nanoparticles. Furthermore, the prepared ZnO-BOPP nanocomposites were evaluated for both mechanical and oxygen barrier property enhancement. A good combination of mechanical and oxygen barrier properties was obtained for the ZnO-BOPP films. This result makes the ZnO-BOPP nanocomposite a proper material for applications such as food packaging.

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Effect of chain architecture on biaxial orientation and oxygen permeability of polypropylene film

Cited by 16 publications

References 16 publications

Biaxially oriented poly(propylene-g-maleic anhydride)/phosphate glass composite films for high gas barrier applications

Biaxially oriented poly(propylene-g-maleic anhydride)/phosphate glass composite films for high gas barrier applications

Influences of processing on the phase transition and crystallization of polypropylene cast films

Influence of incorporation of ZnO nanoparticles and biaxial orientation on mechanical and oxygen barrier properties of polypropylene films for food packaging applications

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