Rheology of Thermoplastic Foam Extrusion Process

2014 ◽  
pp. 39-82
Author(s):  
Richard Gendron ◽  
Louis Daigneault
Keyword(s):  
Extrusion Process ◽  
Foam Extrusion ◽  
Thermoplastic Foam

Growth of gas bubbles in the foam extrusion process

2000 ◽  
Vol 19 (2) ◽  
pp. 97-112 ◽  
Author(s):  
Chong Hoon Lee ◽  
Ki-Jun Lee ◽  
Ho Gab Jeong ◽  
Seong Woo Kim
Keyword(s):  
Gas Bubbles ◽  
Extrusion Process ◽  
Foam Extrusion

Microcellular Structure of PP/Waste Rubber Powder Blends with Supercritical CO2 by Foam Extrusion Process

2009 ◽  
Vol 45 (6) ◽  
pp. 499-514 ◽  
Author(s):  
Zhen Xiang Xin ◽  
Zhen Xiu Zhang ◽  
Kaushik Pal ◽  
Kwang-Jea Kim ◽  
Dong Jin Kang ◽  
...  
Keyword(s):  
Supercritical Co2 ◽  
Extrusion Process ◽  
Rubber Powder ◽  
Foam Extrusion ◽  
Waste Rubber ◽  
Powder Blends ◽  
Waste Rubber Powder

A Study of Strain-Induced Nucleation in Thermoplastic Foam Extrusion

2004 ◽  
Vol 40 (1) ◽  
pp. 27-44 ◽  
Author(s):  
Jacques Tatibouët ◽  
Richard Gendron
Keyword(s):  
Foam Extrusion ◽  
Thermoplastic Foam

scholarly journals Effects of chemical modifications on the rheological and the expansion behavior of polylactide (PLA) in foam extrusion

e-Polymers ◽  
2019 ◽  
Vol 19 (1) ◽  
pp. 297-304 ◽  
Author(s):  
Tobias Standau ◽  
Svenja Murillo Castellón ◽  
Agathe Delavoie ◽  
Christian Bonten ◽  
Volker Altstädt
Keyword(s):  
Compression Strength ◽  
Cell Structure ◽  
Extrusion Process ◽  
Dicumyl Peroxide ◽  
Melt Strength ◽  
Foam Extrusion ◽  
Density Reduction ◽  
Expansion Behavior ◽  
Number Of Publications ◽  
First Time

AbstractIt is well known that polylactide (PLA) is difficult to foam due to its low melt strength. Thus, many ways were described in the literature to enhance the foamability. However, the melt strength was actually determined only in a limited number of publications. In this study, the addition of chemical modifiers was used to change the rheological behavior of PLA and thereby improve its foamability in foam extrusion process. For the first time the use of dicumyl peroxide modified PLA in foam extrusion is described. Both modifications lead to a distinct increase in melt strength. Here, the highest increase was shown for the PLA modified with dicumyl peroxide. Furthermore, strain hardening was observed for PLA modified with the peroxide. Low density foams were achieved for neat and modified PLA in foam extrusion. Neat PLA showed a density of 45 kg/m3, while the peroxide modified PLA showed the highest expansion with a density reduction down to 32 kg/m3. Both modifications result in a more uniform cell structure and an improved compression strength. Here, the foamed, peroxide modified PLA showed outstanding performance compared to neat PLA foam with twice the compression strength (151 Pa) even at a 30% lower density.

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