Orientation of LDPE Crystals from Microscale to Nanoscale <italic style="font-style: italic">via</italic> Microlayer or Nanolayer Coextrusion

Hong-ting Pu; Jun-feng Cheng

doi:10.1007/s10118-016-1850-0

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Orientation of LDPE Crystals from Microscale to Nanoscale via Microlayer or Nanolayer Coextrusion

Papers | Updated：2021-05-12

- Orientation of LDPE Crystals from Microscale to Nanoscale via Microlayer or Nanolayer Coextrusion
- Chinese Journal of Polymer Science Vol. 34, Issue 12, Pages: 1411-1422(2016)
- Affiliations：
  
  School of Materials Science and Engineering, Tongji University, Shanghai 201804, China
- Author bio：
- Funds：
- DOI：10.1007/s10118-016-1850-0
  CLC：
- Received：13 May 2016，
  
  Revised：2016-6-18，
  
  Accepted：18 June 2016，
  
  Published：2016-12
- Accepted：
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Hong-ting Pu, Jun-feng Cheng. Orientation of LDPE Crystals from Microscale to Nanoscale via Microlayer or Nanolayer Coextrusion[J]. Chinese Journal of Polymer Science, 2016, 34(12): 1411-1422. DOI: 10.1007/s10118-016-1850-0.
DOI：

Hong-ting Pu, Jun-feng Cheng. Orientation of LDPE Crystals from Microscale to Nanoscale via Microlayer or Nanolayer Coextrusion[J]. Chinese Journal of Polymer Science, 2016, 34(12): 1411-1422. DOI: 10.1007/s10118-016-1850-0. DOI：

摘要

Abstract

The microlayer or nanolayer coextrusion of hundreds or thousands of alternating low density polyethylene (LDPE)/polystyrene (PS) microlayers or nanolayers were used to study the orientation of LDPE crystals in the confined quasi-two-dimensional or two-dimensional space. The clear and continuous layer structures from microscale to nanoscale can be found in SEM images. The morphology evolution of LDPE crystals in the confined microlayer or nanolayer can be varied from 3D spherulites

2D spherulites

stacked edge-on lamellar

to single edge-on lamellar. Due to the orientation of the LDPE crystals

the tensile strength of the films increases obviously when the layer thickness reduces to nanoscale. The 2D small angle X-ray scattering (SAXS) patterns can reflect the average degree of orientation of LDPE in the confined layers. The stacking of LDPE lamellae is suppressed in interlamination and oppositely in parallel to the extrusion direction. The specific orientation function

can be calculated from the patterns. The infrared dichroism further confirms the mutation of the orientation of LDPE crystals from microscale to nanoscale in the confined space.

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Orientation of LDPE Crystals from Microscale to Nanoscale via Microlayer or Nanolayer Coextrusion

DOI：10.1007/s10118-016-1850-0

摘要

Abstract

关键词

Keywords

references