The effect of the length of the short chain branch on the impact properties of linear low density polyethylene

1992 ◽  
Vol 32 (14) ◽  
pp. 944-955 ◽  
Author(s):  
T. M. Liu ◽  
W. E. Baker
Keyword(s):  
Short Chain ◽  
Low Density Polyethylene ◽  
Low Density ◽  
Linear Low Density Polyethylene ◽  
Impact Properties ◽  
The Impact ◽  
Chain Branch

The Influence of Short Chain Branch on the Crystal Characteristics and Breakdown Strength of Low-Density Polyethylene

2021 ◽  
Vol 28 (4) ◽  
pp. 1181-1188
Author(s):  
Liuhao Jiang ◽  
Shihang Wang ◽  
Liuqing Yang ◽  
Shengtao Li ◽  
Yang Feng ◽  
...  
Keyword(s):  
Breakdown Strength ◽  
Short Chain ◽  
Low Density Polyethylene ◽  
Low Density ◽  
Chain Branch

scholarly journals Effect of Die Head Temperature at Compounding Stage on the Degradation of Linear Low Density Polyethylene/Plastic Film Waste Blends after Accelerated Weathering

2016 ◽  
Vol 2016 ◽  
pp. 1-18 ◽  
Author(s):  
S. M. Al-Salem ◽  
N. M. Al-Dousari ◽  
G. Joseph Abraham ◽  
M. Aromin D’Souza ◽  
O. A. Al-Qabandi ◽  
...  
Keyword(s):  
Light Transmission ◽  
Rapid Change ◽  
Low Density Polyethylene ◽  
Accelerated Weathering ◽  
Low Density ◽  
Plastic Film ◽  
Linear Low Density Polyethylene ◽  
Total Change ◽  
The Impact ◽  
Head Temperature

Accelerated weathering test was performed on blends of linear low density polyethylene (LLDPE) and plastic film waste constituting the following percentages of polyolefin polymers (wt.%): LLDPE (46%), low density polyethylene (LDPE, 51%), high density polyethylene (HDPE, 1%), and polypropylene (PP, 2%). Compounded blends were evaluated for their mechanical and physical (optical) properties. The impact of photodegradation on the formulated blends was studied, and loss of mechanical integrity was apparent with respect to both the exposure duration to weathering and waste content. The effect of processing conditions, namely, the die head temperature (DHT) of the blown-film assembly used, was investigated in this work. It was witnessed that surpassing the melting point of the blends constituting polymers did not always result in a synergistic behaviour between polymers. This was suspected to be due to the loss of amorphous region that polyolefin polymers get subjected to with UV exposure under weathering conditions and the effect of the plastic waste constituents. The total change in colour (ΔE) did not change with respect to DHT or waste content due to rapid change degradation on the material’s surface. Haze (%) and light transmission (%) decreased with the increase in waste content which was attributed to lack of miscibility between constituting polymers.

scholarly journals Rotational Molding of Linear Low-Density Polyethylene Composites Filled with Wheat Bran

Polymers ◽  
2020 ◽  
Vol 12 (5) ◽  
pp. 1004 ◽  
Author(s):  
Aleksander Hejna ◽  
Mateusz Barczewski ◽  
Jacek Andrzejewski ◽  
Paulina Kosmela ◽  
Adam Piasecki ◽  
...  
Keyword(s):  
Polymer Composites ◽  
Wheat Bran ◽  
Mechanical Performance ◽  
Low Density Polyethylene ◽  
Low Density ◽  
Linear Low Density Polyethylene ◽  
Rotational Molding ◽  
Wood Polymer ◽  
Wood Polymer Composites ◽  
The Impact

Application of lignocellulosic fillers in the manufacturing of wood polymer composites (WPCs) is a very popular trend of research, however it is still rarely observed in the case of rotational molding. The present study aimed to analyze the impact of wheat bran content (from 2.5 wt.% to 20 wt.%) on the performance of rotationally-molded composites based on a linear low-density polyethylene (LLDPE) matrix. Microscopic structure (scanning electron microscopy), as well as physico-mechanical (density, porosity, tensile performance, hardness, rebound resilience, dynamic mechanical analysis), rheological (oscillatory rheometry) and thermo-mechanical (Vicat softening temperature) properties of composites were investigated. Incorporation of 2.5 wt.% and 5 wt.% of wheat bran did not cause significant deterioration of the mechanical performance of the material, despite the presence of ‘pin-holes’ at the surface. Values of tensile strength and rebound resilience were maintained at a very similar level, while hardness was slightly decreased, which was associated with the porosity of the structure. Higher loadings resulted in the deterioration of mechanical performance, which was also expressed by the noticeable rise of the adhesion factor. For lower loadings of filler did not affect the rheological properties. However, composites with 10wt.% and 20 wt.% also showed behavior suitable for rotational molding. The presented results indicate that the manufacturing of thin-walled products based on wood polymer composites via rotational molding should be considered a very interesting direction of research.

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