Rheological, thermal, and morphological properties of low‐density polyethylene/ultra‐high‐molecular‐weight polyethylene and linear low‐density polyethylene/ultra‐high‐molecular‐weight polyethylene blends

Abstract

The dynamic rheological behavior of low‐density polyethylene (LDPE)/ultra‐high‐molecular‐weight polyethylene (UHMWPE) blends and linear low‐density polyethylene (LLDPE)/UHMWPE blends was measured in a parallel‐plate rheometer at 180, 190, and 200°C. Analysis of the log–additivity rule, Cole–Cole plots, Han curves, and Van Gurp curves of the LDPE/UHMWPE blends indicated that the blends were miscible in the melt. In contrast, the rheological properties of LLDPE/UHMWPE showed that the miscibility of the blends was decided by the composition of LLDPE. The differential scanning calorimetry results and scanning electron microscopy photos of the LLDPE/UHMWPE blends were consistent with the rheological properties, whereas with regard to the thermal and morphological properties of LDPE/UHMWPE blends, the results reveal three endothermic peaks and phase separation, which indicated a liquid–solid phase separation in the LDPE/UHMWPE blends. © 2012 Wiley Periodicals, Inc. J. Appl. Polym. Sci., 2013

Influence of Molecular Weight on the Creep Resistance of Almost Molten Polyethylene Blends

“…By comparison with the melting thermogram of neat LDPE, we identify the first peak at 111 °C as melting of LDPE crystallites. According to previous reports, the two additional peaks at about 118 and 124 °C correspond to melting of cocrystals and HDPE‐rich crystals, respectively. The melting endotherms of the two blends comprising the low and ultrahigh molecular‐weight polyethylene display a markedly different behavior, i.e., a single peak at 113 °C.…”

Thermal, electrical and rheological behavior of high-density polyethylene/graphite composites

“…7, the phase angle (δ) is plotted against the value of the complex modulus (G*), which is known as van GurpPalmen plot. The plot is often used to characterize the miscibility of polymer blends [39]. In addition, it is also recommended in literature to identify the 'rheological percolation'.…”

Thermal, Mechanical and Rheological Behaviors of Nanocomposites Based on UHMWPE/Paraffin Oil/Carbon Nanofiller Obtained by Using Different Dispersion Techniques

“…Additionally, other literature papers have studied the effect of filler materials on rheological behavior by using dynamic rheometry [16][17][18][19][20] because of the high complex viscosity of UHMWPE due to its high molecular weight. In particular, Chen Ma et al (2014) studied all the above mentioned thermal and rheological features of UHMWPE based nanocomposites and CNF modified with ionic liquid by sonication, mixed by stirring and then added with antioxidant using a twin-screw blender.…”