Numerical Modeling of Bubble Growth in Microcellular Polypropylene Produced in a Core-Back Injection Process Using Chemical Blowing Agents

2016 ◽  
Vol 31 (1) ◽  
pp. 26-36 ◽  
Author(s):  
J. A. Reglero Ruiz ◽  
M. Vincent ◽  
J.-F. Agassant
Keyword(s):  
Numerical Modeling ◽  
Bubble Growth ◽  
Blowing Agents ◽  
Injection Process ◽  
Chemical Blowing Agents

scholarly journals Morphological analysis of microcellular PP produced in a core-back injection process using chemical blowing agents and gas counter pressure

2015 ◽  
Vol 55 (11) ◽  
pp. 2465-2473 ◽  
Author(s):  
José Antonio Reglero Ruiz ◽  
Michel Vincent ◽  
Jean-François Agassant ◽  
Aurore Claverie ◽  
Sébastien Huck
Keyword(s):  
Morphological Analysis ◽  
Blowing Agents ◽  
Injection Process ◽  
Counter Pressure ◽  
Chemical Blowing Agents

Study of the rheology and foaming processes of poly(vinyl chloride) plastisols with different foaming agents

2019 ◽  
Vol 39 (2) ◽  
pp. 117-123 ◽  
Author(s):  
Yubi Ji ◽  
Heng Luo ◽  
Min Shi ◽  
Zhao Yang ◽  
Wei Gong ◽  
...  
Keyword(s):  
Vinyl Chloride ◽  
Complex Viscosity ◽  
Mechanical Analysis ◽  
Decomposition Temperature ◽  
Scanning Calorimetry ◽  
Foaming Agents ◽  
Blowing Agents ◽  
Poly Vinyl Chloride ◽  
Chemical Blowing Agents

AbstractPoly(vinyl chloride) (PVC) plastisols are widely used in the production of flexible PVC foams. In this study, we investigated the evolution of the complex viscosity of PVC plastisol by dynamic oscillatory tests, the storage modulus of the PVC compound by dynamic mechanical analysis, and the thermal behavior including the decomposition of three chemical blowing agents (CBAs), namely, azodicarbonamide, 4,4′-oxybis(benzenesulfonyl hydrazide), and sodium bicarbonate, by differential scanning calorimetry. Furthermore, the morphology and quality of the foams obtained from the corresponding plastisols were characterized by scanning electron microscopy. The results indicated that the onset decomposition temperature T2(5%) of a CBA in plastisol is the most critical indicator of the foam quality. The temperature difference corresponding to [T2(5%) – Tηmax] was also proved to be another important parameter. When T2(5%) is within the optimum temperature range of a PVC plastisol, the bigger the [T2(5%) – Tηmax] difference, the better the quality of the foams.

Versatile New Liquid Organic Chemical Blowing Agents for Cellular Vinyls

1966 ◽  
Vol 2 (2) ◽  
pp. 97-111 ◽  
Author(s):  
Chester S. Sheppard ◽  
H. Norman Schack ◽  
Orville L. Mageli
Keyword(s):  
Organic Chemical ◽  
Blowing Agents ◽  
Chemical Blowing Agents
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