The Universal Selection Source: Cosmetics Ingredients

Online Course

Reactive Extrusion for Twin Screw Extrusion Pro

This is a Past Course

Recorded on May 16, 2017

Get started with reactive extrusion for your thermoplastics by getting a 360⁰ view of the process, reaction chemistry as well as how to configure the extruder.

Kenneth Russell will help you spend less time on trial and error & develop materials with reactive extrusion faster by sharing hands-on tips on injecting liquids, defining the right residence time distribution (RTD)…

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Kenneth Russel Presented By:
Kenneth W Russell

Length: 90 min

Course Type: Formulation
Level: Beginner

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Package includes:

.wmv Courses Recording, Presentation Slides & Transcript of Q&A session

Why should you view this course?

Did you think of using Reactive Extrusion to develop your next exciting materials & then realize that reactive chemistry makes a big difference? Don’t give up… Join this course instead and:

  1. Save time by knowing the basics of reactive extrusion and how to achieve desired polymer properties using your extruder as a reactor
  2. Understand the very important reaction chemistry (Free-Radical, Saponification and more...) governing the whole process
  3. Achieve good mixing by understanding how to best configure the reactive extrusion process (Screw design, Liquid injection, Mixing configurations...)
Reactive Extrusion

Who should view this course?

  1. R&D Chemists, Research Engineers working with twin-screw extrusion
  2. Product Development Manager
  3. Compounders
  4. Masterbatchers
  5. Application Development Manager
who are willing to step into Reactive Extrusion. The course is particularly suited for people with prior experience in Twin Screw Extrusion

Course Outline

The following sections will be covered during this course:
  1. Introduction

  2. Why use an extruder as a reactor?

  3. Configuring the process for reactive extrusion
    • Screw design concerns
    • Liquid injection
      • How to inject liquid
      • Why liquids should should be handled in a certain way
    • Mixing configurations
    • Screw elements that should be used for good mixing and elements that should be avoided
    • Measuring residence time distribution (RTD)
    • General trends in how RTD is affected by screw configuration

  4. Reaction Chemistry and Effect on Extruder Configuration
    • Free-Radical chemistry
      • Initiation
      • Propagation
      • PE crosslinking
      • PP chain scission
      • Grafting
    • Saponification
      • Patent examples
      • Making ionomers with ethylene – acrylate polymers
    • Trans-esterification
      • Patent examples – ethylene acrylate polymers with alcohol
      • Use of a Partial condenser to improve conversion


  5. Safety
    • Raw material hazards
      • Maleic anhydride
      • Organic peroxides
      • Alcohols
    • Hazards due to reactivity
      • Volatile by-products
    • Thermal hazards
    • Melt temperature
    • Pressure development

  6. Practical heat transfer concerns for Good Reaction Control (at the Expected Rate)

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Members Reviews

The explanations about how to inject liquids and the proper screw design was useful.

Jan M. , from Lehmann & Voss & Co. KG

It was useful to have a general overview of some key points/parameter in REX in twin screw. The Q&A was useful.

Joachim S. , from PolyOne

Learnt about possibilities of using a twin screw extruder as a reactor. Also, learnt about set up, start up and potential designs.

Robin van V. , from Kraton Polymers

This was a good introduction to reactive extrusion.

Brett R. , from Total Cray Valley

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