Abstract
The on-line morphological development during film blowing of 2 different linear low density polyethylenes (LLDPEs) and a blend of LLDPE with low density polyethylene (LDPE) has been investigated, for the first time, using synchrotron Small Angle X-ray Scattering (SAXS). The processing conditions, blow-up ratio and take-up ratio, have been varied and the resulting lamellar thickness, linear crystallinity and orientation evolution in machine direction is obtained from a detailed analysis of SAXS data. Ex-situ SAXS and wide angle X-ray Diffraction (WAXD) confirmed the effect of molecular structure and composition on structure evolution observed in the on-line experiments. The results obtained provide a valuable set of data for the understanding of the film blowing process and can be used to extend and improve numerical model. (C) 2015 Elsevier Ltd. All rights reserved.
| Original language | English |
|---|---|
| Pages (from-to) | 190-208 |
| Number of pages | 19 |
| Journal | European Polymer Journal |
| Volume | 74 |
| DOIs | |
| Publication status | Published - Jan-2016 |
| Externally published | Yes |
Keywords
- Film blowing
- SAXS
- Crystallisation
- Processing
- LOW-DENSITY POLYETHYLENE
- SECONDARY CRYSTALLIZATION
- 2-PHASE SYSTEMS
- MORPHOLOGY
- ORIENTATION
- POLYMERS
- LLDPE
- MELT
- CRYSTALLINITY
- DIFFRACTION