An analysis of melt spinning master-curves of low-density polyethylene/linear low-density polyethylene blends. (August 2019)

• Record Type: Journal Article
• Authors: Liang, Ji-Zhao
• Is Part Of: Polymer testing. Volume 77(2019)
• Publication Date: 2019-08
• Subjects: Polyethylene -- Blends -- Melt spinning -- Extension flow -- Rheology; Polymers -- Testing -- Periodicals; Polymères -- Tests -- Périodiques; 620.1920287
• DOI: 10.1016/j.polymertesting.2019.105926
• Languages: English
• ISSNs: 0142-9418

Abstract

Abstract: The melt elongation rheological behavior of a low-density polyethylene (LDPE) blended with a linear low-density polyethylene (LLDPE) was studied using a melt spinning technique. Based on the extension properties of the LDPE/LLDPE blend melt under experimental conditions, the melt spinning master-curves were plotted by introducing scaling factor b. The results showed that the extension load increased with increasing extension rate while decreased with increasing die extrusion temperature. It was found that the melt spinning master-curves could describe the elongation rheological behavior of the LDPE/LLDPE melt melts under different conditions including various die extrusion temperatures, die extrusion rates and LLDPE weight fractions. In addition, both the relationship between the scaling factor and absolute temperature and the relationship between lg b and lg v 0 were linear. Highlights: Plotting the blend melt spinning master-curves by introducing scaling factor b. Observing that the extension load increased with increasing extension rate while decreased with increasing die extrusion temperature. Finding that the melt spinning master-curves could describe the melt rheological behavior of the blends under different conditions. Noting that the relationship between the scaling factor and absolute temperature and the relationship between and were linear. Explaining the mechanisms of the blend melt spinning master-curves.