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A Study of Properties of Polyamide/Butyl Rubber Blends

A Study of Properties of Polyamide/Butyl Rubber Blends. J.D. (Jack) Van Dyke Marek Gnatowski Andy Koutsandreas Andrew Burczyk. Blending Possibilities. Type of butyl rubber (IIR, CIIR, BIIR) Proportion in the blend Non-vulcanized or dynamically vulcanized

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A Study of Properties of Polyamide/Butyl Rubber Blends

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  1. A Study of Properties of Polyamide/Butyl Rubber Blends J.D. (Jack) Van Dyke Marek Gnatowski Andy Koutsandreas Andrew Burczyk

  2. Blending Possibilities • Type of butyl rubber (IIR, CIIR, BIIR) • Proportion in the blend • Non-vulcanized or dynamically vulcanized • Vulcanizing agent (S, ZnO/ZDEDC, MgO/ Amine) • Type of polyamide • Blending conditions • Preparation of the sample

  3. Polyamide/Butyl Rubber Blends Non-Vulcanized • Halogenated butyl rubber - more reactive • Graft/block formation during high speed mixing • Halogenated butyl rubber – more graft/block • Evidence of graft/block in extracted samples • Presence of polyamide peak by FTIR • Microanalysis indicates excess nitrogen present

  4. Tensile Properties of Polyamide 12/ Rubber Blends- Non-Vulcanized

  5. Non-Vulcanization vs. Dynamic Vulcanization

  6. Dynamic Vulcanization

  7. Rheology of PA/Butyl Rubber Blends – Comparison

  8. % Insolubles – Non Vulcanized vs. Dynamically Vulcanized

  9. Polyamide Melting Temperature - Effect of Rubber Type and Processing

  10. Comparison of Tensile Strengths - Non-Vulcanized and Dynamically Vulcanized

  11. Comparison of Elongations - Non-Vulcanized and Dynamically Vulcanized

  12. Effect Molding Procedure on Tensile Properties for Dynamically-Vulcanized 40/60 PA/Rubber Blends

  13. Effect of Rubber Properties on Tensile Strength for Dynamically Vulcanized 40/60 PA/Rubber Blends

  14. Conclusions • Compatible blends are formed under high shear mixing - both non-vulcanized and vulcanized. • Rheology of the blends depends on the method of preparation. • A sample is more processible at high shear in dynamically vulcanized blends.

  15. Conclusions 4. For dynamically vulcanized blends, the highest tensile and elongation values are obtained with CIIR as the blend component. 5. Mechanical properties seem to be affected by a. type of halogen b. Mooney viscosity of the rubber c. method of processing d. not affected by the unsaturation in the rubber phase.

  16. Acknowledgements • Department of National Defence – Canada • Laboratory staff at PEC • Dave Lesewick, Christine Mah • Laboratory staff at TWU • Andria Lengkeek, Miriam Buschhaus • Polymer Engineering Co. and Trinity Western University • Generous use of facilities

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