A Mathematical Model for the Reactive Extrusion of Methyl Methacrylate in a Co-rotating Twin-Screw Extruder

2005 ◽  
Vol 44 (26) ◽  
pp. 9805-9817 ◽  
Author(s):  
Alejandro Zagal ◽  
Eduardo Vivaldo-Lima ◽  
Octavio Manero
Keyword(s):  
Mathematical Model ◽  
Methyl Methacrylate ◽  
Reactive Extrusion ◽  
Twin Screw Extruder ◽  
Screw Extruder ◽  
Twin Screw

scholarly journals Investigation of the Thermal and Hydrolytic Degradation of Polylactide during Autoclave Foaming

Polymers ◽  
2021 ◽  
Vol 13 (16) ◽  
pp. 2624
Author(s):  
Julia Dreier ◽  
Christian Brütting ◽  
Holger Ruckdäschel ◽  
Volker Altstädt ◽  
Christian Bonten
Keyword(s):  
Thermal Degradation ◽  
Hydrolytic Degradation ◽  
Reactive Extrusion ◽  
Foaming Properties ◽  
Twin Screw Extruder ◽  
Degradation Behavior ◽  
Screw Extruder ◽  
Melt Strength ◽  
Twin Screw ◽  
Good Potential

Polylactide (PLA) is one of the most important bioplastics worldwide and thus represents a good potential substitute for bead foams made of the fossil-based Polystyrene (PS). However, foaming of PLA comes with a few challenges. One disadvantage of commercially available PLA is its low melt strength and elongation properties, which play an important role in foaming. As a polyester, PLA is also very sensitive to thermal and hydrolytic degradation. Possibilities to overcome these disadvantages can be found in literature, but improving the properties for foaming of PLA as well as the degradation behavior during foaming have not been investigated yet. In this study, reactive extrusion on a twin-screw extruder is used to modify PLA in order to increase the melt strength and to protect it against thermal degradation and hydrolysis. PLA foams are produced in an already known process from the literature and the influence of the modifiers on the properties is estimated. The results show that it is possible to enhance the foaming properties of PLA and to protect it against hydrolysis at the same time.

Graft Polymerization of L-Lactide onto Cellulose in Ionic Liquid via Twin Screw Extruder

2013 ◽  
Vol 658 ◽  
pp. 8-12
Author(s):  
Xuan Zhong ◽  
Xian Tao Tong ◽  
Mu Huo Yu ◽  
Hai Feng Li ◽  
Huan Li ◽  
...  
Keyword(s):  
Thermal Stability ◽  
Ionic Liquid ◽  
Ring Opening ◽  
Graft Polymerization ◽  
Reactive Extrusion ◽  
Extrusion Process ◽  
Twin Screw Extruder ◽  
Reaction Products ◽  
Screw Extruder ◽  
Twin Screw

A twin-screw extruder was used to carry out the ring opening graft polymerization of L-lactide onto cellulose through reactive extrusion process. Ionic liquid (1-butyl-3-methylimidazolium chloride) [Bmim]Cl and Sn(oct)2 were used as solvent and catalyst, respectively. FTIR, TGA and XRD were used to investigate the structure, thermal stability and crystalline behavior of the reaction products. The result showed a successful ring opening polymerization of L-lactide on cellulose. Furthermore, it showed a increased crystalline degree and thermal stability after being introduced the PLLA.

scholarly journals Single-step reactive extrusion of PLLA in a corotating twin-screw extruder promoted by 2-ethylhexanoic acid tin(II) salt and triphenylphosphine

Polymer ◽  
2000 ◽  
Vol 41 (9) ◽  
pp. 3395-3403 ◽  
Author(s):  
S. Jacobsen ◽  
H.G. Fritz ◽  
Ph. Degée ◽  
Ph. Dubois ◽  
R. Jérôme
Keyword(s):  
Reactive Extrusion ◽  
Single Step ◽  
Twin Screw Extruder ◽  
Screw Extruder ◽  
Twin Screw

A Simple-to-Implement Simulator for the Reactive Extrusion of Poly(Lactic Acid) in a Corotating Uniform Twin-Screw Extruder

2020 ◽  
Author(s):  
René O Vargas ◽  
J Esteban López-Aguilar ◽  
Lorenzo A Martínez-Suástegui ◽  
Francisco López-Serrano
Keyword(s):  
Lactic Acid ◽  
Reactive Extrusion ◽  
Poly Lactic Acid ◽  
Twin Screw Extruder ◽  
Screw Extruder ◽  
Twin Screw
Sign in / Sign up

Export Citation Format

Share Document