Copolymerization of ethylene and in situ -generated α-olefins to high-performance linear low-density polyethylene with a two-catalyst system supported on mesoporous molecular sieves

2010 ◽  
Vol 59 (6) ◽  
pp. 725-732 ◽  
Author(s):  
Cun-Yue Guo ◽  
Hao Xu ◽  
Mingge Zhang ◽  
Hai-Jian Yang ◽  
Fengwen Yan ◽  
...  
Keyword(s):  
Molecular Sieves ◽  
High Performance ◽  
Catalyst System ◽  
Mesoporous Molecular Sieves ◽  
Low Density Polyethylene ◽  
Low Density ◽  
Linear Low Density Polyethylene

High performance linear low density polyethylene nanocomposites reinforced by two-dimensional layered nanomaterials

Polymer ◽  
2019 ◽  
Vol 172 ◽  
pp. 142-151 ◽  
Author(s):  
Tao Li ◽  
Haoyang Sun ◽  
Fan Lei ◽  
Dandan Li ◽  
Jing Leng ◽  
...  
Keyword(s):  
High Performance ◽  
Low Density Polyethylene ◽  
Low Density ◽  
Two Dimensional ◽  
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

In Situ Positron Lifetime Measurement for the Strained Polyethylene

2012 ◽  
Vol 733 ◽  
pp. 139-142
Author(s):  
Masanori Fujinami ◽  
Ryutaro Minei ◽  
Chang Gui Liu ◽  
Kenta Hara
Keyword(s):  
Structural Change ◽  
Positron Lifetime ◽  
Tensile Deformation ◽  
Positron Annihilation Spectroscopy ◽  
Low Density Polyethylene ◽  
Low Density ◽  
Linear Low Density Polyethylene ◽  
Day By Day ◽  
Positron Lifetime Measurement

The in situ positron annihilation spectroscopy measurement has been developed and applied to investigate the structural change in free volume on the tensile deformation of linear low-density polyethylene. The pick-off lifetime of ortho-positronium (Ps) decreases by applying the strain and an aging variation cannot be observed. On the contrary the fraction of Ps formation gradually decreases day by day and becomes constant after several days. Further, after release of strain, it returns to the original value. The reason is considered to be that the molecular chains become rigid gradually during deformation and they lose the flexibility.

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