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Troubleshooting Polyolefin Grafting via Reactive Extrusion

This is a Past Course

Recorded on Nov 21, 2017

Achieve high quality grafted polyolefin products using reaction extrusion by understanding all components - chemistry of the reaction, the design of the extruder and the operation of the process.

Kenneth Russell will help you understand & control grafting reaction, interaction b/w components, optimize compounding. He will also share practical troubleshooting tips for issues such as black specks, gel defects, varying melt viscosities...

Read the full Course Outline

Kenneth Russel Presented By:
Kenneth W Russell

Length: 90 min

Course Type: Methodology
Level: Advanced

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

Why should you view this course?

To achieve high quality grafted polyolefin products, you need to ensure that the grafted monomer is fully bound to the polymer. This can be tricky as several competing reactions are usually present! Also, the same free radical chemistry in a reactive extruder gives different results with PE and PP. 

To understand how to control the chemistry & process and troubleshoot recurring issues, join this course and:

1. Achieve desired quality by understanding the mechanism of grafting & free radical chemistry in a reactive extruder and how PP differs from PE during reaction

2. Optimize your compounding process by understanding the interactions b/w components, type of mixing required, how to control melt temp., screw designs..

3. Troubleshoot efficiently current & future challenges (black specks, gel defects, varying melt viscosities, high volatiles...) with practical tips from Kenneth Russell 
Troubleshooting Polyolefin Grafting via Reactive Extrusion

Who should view this course?

Engineers and lead operators (polymer converters) producing / entering into production of grafted polyolefin products using reactive extrusion. 

Course Outline

  1. Review of the reactive extrusion process
    1. Reactions with polypropylene
    2. Reactions with polyethylene
    3. How polypropylene differs from polyethylene during reaction

  2. Feeding of liquids

  3. Free Radical Chemistry
    1. Typical peroxides used
    2. Safe handling of peroxides
    3. Alternate initiators/catalysts
      1. AIBN
      2. UV

  4. Screw design considerations

  5. Controlled rheology of polypropylene
    1. Out of control melt flow
    2. Uncontrolled degradation
    3. Generation of volatiles
    4. Effect of stabilizers

  6. Grafting of Maleic Anhydride to PP
    1. Controlling MAH content
    2. Is the MAH fully bound?
    3. Controlling melt viscosity for PP

  7. Crosslinking of PE
    1. Differences between HDPE/LLDPE and LDPE

  8. Grafting Maleic Anhydride to PE
    1. Generation of gels and specs
    2. Controlling melt viscosity for PE
    3. Safety concerns with Maleic Anhydride

  9. Grafting silanes to PE
    1. Process concerns
    2. Silane handling

  10. 30 Mins Q&A Session- Ask your questions directly to the expert !

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