Thermal and Thermorheologic Characterization of Different Polyolefin Waste Fractions

2017 ◽  
Vol 907 ◽  
pp. 74-79
Author(s):  
Adela Lazar ◽  
Catalin Croitoru ◽  
Mircea Horia Tierean ◽  
Liana Sanda Baltes
Keyword(s):  
Molecular Mass ◽  
High Density Polyethylene ◽  
Melt Flow Index ◽  
Household Waste ◽  
Flow Index ◽  
Melt Flow ◽  
Polymer Waste ◽  
Lower Molecular Mass ◽  
Low Shear

In this study, melt flow index values from several household waste fractions containing mainly polypropylene and high-density polyethylene, were measured at 190 °C for polyethylene and 230 °C for polypropylene-rich fractions. High values of MFI (low shear viscosities) have been reported probably due to the lower molecular mass of the polymer waste and/or the presence of surfactant compounds on the surface of the polymer flakes. Also, by extruding the same batch in different cycles at the same temperature values, the number of processing cycles on which the polymer could be recycled has been determined.

scholarly journals EFFECT OF POLYETHYLENE MOLECULAR MASS CHARACTERISTICS ON SLIP EFFECT

2016 ◽  
Vol 11 (5) ◽  
pp. 91-93
Author(s):  
A. A. Yurkin ◽  
I. D. Simonov-Emelyanov ◽  
P. V. Surikov ◽  
N. L. Shembel
Keyword(s):  
Molecular Weight ◽  
Molecular Mass ◽  
Rheological Properties ◽  
Melt Flow Index ◽  
Flow Index ◽  
Slip Effect ◽  
Melt Flow ◽  
Molecular Weight Characteristics ◽  
Different Temperatures ◽  
Different Molecular Weight

The rheological properties of polyethylene with different molecular weight characteristics were studied. Difference of molecular weight characteristics was found on the basis of melt flow index, and slip effect in the molten polyethylene flow was studied. The presence of slip effect is found in case of flowing polyethylene with a higher molecular weight in contrast to polyethylene with lower molecular weight at different temperatures. Changes of the slip effect parameters upon mixing polyethylenes with very much different molecular weight characteristics were studied.

Estimation of the melt rheology of polymer waste from melt flow index

Polymer ◽  
1983 ◽  
Vol 24 (6) ◽  
pp. 722-728 ◽  
Author(s):  
A.V. Shenoy ◽  
D.R. Saini ◽  
V.M. Nadkarni
Keyword(s):  
Melt Flow Index ◽  
Flow Index ◽  
Melt Flow ◽  
Melt Rheology ◽  
Polymer Waste

Properties of Recycled High Density Polyethylene/Recycled Polypropylene Blends: Effect of Maleic Anhydride Polypropylene

2013 ◽  
Vol 594-595 ◽  
pp. 837-841 ◽  
Author(s):  
A.A.S. Maryam Atiqah ◽  
Husseinsyah Salmah ◽  
Z. Firuz ◽  
D.N.U. Lan
Keyword(s):  
Tensile Strength ◽  
Maleic Anhydride ◽  
Modulus Of Elasticity ◽  
High Density Polyethylene ◽  
Melt Flow Index ◽  
Flow Index ◽  
Melt Flow ◽  
Recycled Polypropylene ◽  
Blend Ratios ◽  
Compatibilized Blends

Polymer blending provides an efficient way to develop new materials with improved properties while preserve the primary properties of the materials at lower cost. The blends recycled high density polyethylene (rHDPE) and recycled polypropylene (rPP) with and without maleic anhydride polypropylene (MAPP) have been investigated. The effect of different blend ratios on tensile properties, morphology and melt flow index were studied. The tensile strength and modulus of elasticity of both blends increased with increased of rPP in the blend ratios but the elongation at break decreased. It was found that the tensile strength and modulus of elasticity of compatibilized rHDPE/rPP blends higher than uncompatibilized blends. The SEM micrograph of tensile fractured surface of compatibilized blends showed better interfacial adhesion and interaction between rHDPE and rPP. The melt flow index of compatibilized blends showed better flowablity than uncompatibilized blends.

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