scholarly journals Joint effects of long-chain branching and specific nucleation on morphology and thermal properties of polypropylene blends

2020 ◽  
Vol 14 (10) ◽  
pp. 952-961
Author(s):  
L. Gajzlerova ◽  
J. Navratilova ◽  
A. Ryzi ◽  
T. Slabenakova ◽  
R. Cermak
Keyword(s):  
Thermal Properties ◽  
Chain Branching ◽  
Long Chain Branching ◽  
Joint Effects ◽  
Polypropylene Blends ◽  
Long Chain

scholarly journals Crystallization Behavior and Crystal Morphology of Linear/Long Chain Branching Polypropylene Blends

2008 ◽  
Vol 40 (5) ◽  
pp. 450-454 ◽  
Author(s):  
Xiang-Dong Wang ◽  
Yu-Xia Zhang ◽  
Ben-Gang Liu ◽  
Zhong-Jie Du ◽  
Hang-Quan Li
Keyword(s):  
Crystallization Behavior ◽  
Crystal Morphology ◽  
Chain Branching ◽  
Long Chain Branching ◽  
Polypropylene Blends ◽  
Long Chain

Novel Dynamically Vulcanized Elastomer-Polypropylene Blends with Improved Elasticity

2003 ◽  
Vol 76 (1) ◽  
pp. 202-211 ◽  
Author(s):  
M. D. Ellul
Keyword(s):  
Residual Deformation ◽  
Thermoplastic Elastomer ◽  
Chain Branching ◽  
Low Frequencies ◽  
Long Chain Branching ◽  
Rubber Phase ◽  
Polypropylene Blends ◽  
Branched Polypropylene ◽  
Long Chain ◽  
Long Chain Branched Polypropylene

Abstract High elasticity in dynamically vulcanized EPDM-Polypropylene blends, as demonstrated by lower residual deformation upon release of constraint, is a much desired attribute. It has been found that this property can be improved beyond the conventional norms of highly crosslinking the rubber phase. This is achieved through the use of a polypropylene phase with a high degree of long-chain branching. The branching index, g', at molecular weight greater than 1×106 should be less than about 0.6. It is postulated that in the melt and at low frequencies the long-chain branched polypropylene behaves as a network. Therefore in the melt, the dynamically vulcanized alloy behaves as a dual network material: one network being the chemically crosslinked rubber phase, and the other being the physical network arising from the high level of long-chain branching in polypropylene. In the solid state, the co-continuous morphology arising from the choice of long-chain branched polypropylene contributes to the enhanced elasticity of the dynamically vulcanized thermoplastic elastomer.

Characterization of long chain branching: Dilution rheology of industrial polyethylenes

2002 ◽  
Vol 46 (2) ◽  
pp. 401-426 ◽  
Author(s):  
B. J. Crosby ◽  
M. Mangnus ◽  
W. de Groot ◽  
R. Daniels ◽  
T. C. B. McLeish
Keyword(s):  
Chain Branching ◽  
Long Chain Branching ◽  
Long Chain

Character of long-chain branching in highly purified natural rubber

2010 ◽  
Vol 115 (6) ◽  
pp. 3645-3650 ◽  
Author(s):  
Sureerut Amnuaypornsri ◽  
Lucksanaporn Tarachiwin ◽  
Jitladda T. Sakdapipanich
Keyword(s):  
Natural Rubber ◽  
Chain Branching ◽  
Long Chain Branching ◽  
Long Chain

The effect of long chain branching on the processability of polypropylene in thermoforming

2004 ◽  
Vol 44 (5) ◽  
pp. 973-982 ◽  
Author(s):  
A. D. Gotsis ◽  
B. L. F. Zeevenhoven ◽  
A. H. Hogt
Keyword(s):  
Chain Branching ◽  
Long Chain Branching ◽  
Long Chain
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