Preparation of linear low-density polyethylene byin situ copolymerization of ethylene with Zr supported on montmorillonite/Fe/methylaluminoxane catalyst system

2004 ◽  
Vol 94 (4) ◽  
pp. 1690-1696 ◽  
Author(s):  
Zhicheng Zhang ◽  
Cunyue Guo ◽  
Nannan Cui ◽  
Yucai Ke ◽  
Youliang Hu
Keyword(s):  
Catalyst System ◽  
Low Density Polyethylene ◽  
Low Density ◽  
Linear Low Density Polyethylene

Linear low density polyethylene: catalyst system effect on polymer microstructure

1995 ◽  
Vol 98 (3) ◽  
pp. 123-133 ◽  
Author(s):  
Giulio Balbontin ◽  
Isabella Camurati ◽  
Tiziano Dall'Occo ◽  
Robert C. Zeigler
Keyword(s):  
Catalyst System ◽  
Low Density Polyethylene ◽  
Low Density ◽  
Linear Low Density Polyethylene ◽  
System Effect ◽  
Polymer Microstructure

Tandem Catalyst System for Linear Low-Density Polyethylene with Short and Long Branching

2010 ◽  
Vol 43 (11) ◽  
pp. 4838-4842 ◽  
Author(s):  
Eric D. Schwerdtfeger ◽  
Craig J. Price ◽  
Jianfang Chai ◽  
Stephen A. Miller
Keyword(s):  
Catalyst System ◽  
Low Density Polyethylene ◽  
Low Density ◽  
Linear Low Density Polyethylene

scholarly journals Identification of the LLDPE Constitutive Material Model for Energy Absorption in Impact Applications

Polymers ◽  
2021 ◽  
Vol 13 (10) ◽  
pp. 1537
Author(s):  
Luděk Hynčík ◽  
Petra Kochová ◽  
Jan Špička ◽  
Tomasz Bońkowski ◽  
Robert Cimrman ◽  
...  
Keyword(s):  
Strain Rate ◽  
Material Model ◽  
Low Density Polyethylene ◽  
Low Density ◽  
Linear Low Density Polyethylene ◽  
Stress Strain ◽  
Rate Dependent ◽  
Constitutive Material Model ◽  
Principal Directions ◽  
Constitutive Material

Current industrial trends bring new challenges in energy absorbing systems. Polymer materials as the traditional packaging materials seem to be promising due to their low weight, structure, and production price. Based on the review, the linear low-density polyethylene (LLDPE) material was identified as the most promising material for absorbing impact energy. The current paper addresses the identification of the material parameters and the development of a constitutive material model to be used in future designs by virtual prototyping. The paper deals with the experimental measurement of the stress-strain relations of linear low-density polyethylene under static and dynamic loading. The quasi-static measurement was realized in two perpendicular principal directions and was supplemented by a test measurement in the 45° direction, i.e., exactly between the principal directions. The quasi-static stress-strain curves were analyzed as an initial step for dynamic strain rate-dependent material behavior. The dynamic response was tested in a drop tower using a spherical impactor hitting a flat material multi-layered specimen at two different energy levels. The strain rate-dependent material model was identified by optimizing the static material response obtained in the dynamic experiments. The material model was validated by the virtual reconstruction of the experiments and by comparing the numerical results to the experimental ones.

Physical and mechanical properties of linear low-density polyethylene/cycloolefin copolymer/layered silicate nanocomposite

2015 ◽  
Vol 37 (11) ◽  
pp. 3167-3174 ◽  
Author(s):  
S. Sánchez-Valdes ◽  
E. Ramírez-Vargas ◽  
L.F. Ramos de Valle ◽  
J.G. Martinez-Colunga ◽  
J. Romero-Garcia ◽  
...  
Keyword(s):  
Mechanical Properties ◽  
Layered Silicate ◽  
Physical And Mechanical Properties ◽  
Low Density Polyethylene ◽  
Low Density ◽  
Linear Low Density Polyethylene
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