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Flexible Sheet Molding Compound (SMC) Using Aliphatic Polyester as Cross Linker

  • M. Esfandeh and M. R. Ebrahimi
Published/Copyright: June 6, 2013
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International Polymer Processing
From the journal International Polymer Processing Volume 18 Issue 2

Abstract

Thermoset resins are brittle and have a poor resistance to crack initiation and growth. This is attributed to their amorphous and highly cross-linked structure. In composite parts made from thermoset molding compositions such as Sheet Molding Compound (SMC) and Bulk Molding Compound (BMC), the initial stage of composite failure is attributed to the properties of the polyester based resin. Thus, improving resin properties by adding various additives has been an interesting area of research. In this work, Maleic anhydride-terminated polycaprolactone (MATPCL) was used to modify the flexural properties of unsaturated polyester (UP) resin. MATPCL was prepared in the lab and was added to UP at 3, 5, 10, 20, 40 and 50 percent by weight. Mechanical properties of the cured samples (flexural and impact strength) were determined and an almost linear increase in impact properties was observed with increasing the MATPCL content. Phase behavior of UP/MATPCL blends was inspected both visually and using scanning electron microscopy and, no gross phase separation was seen at the levels used. SMC was prepared in conventional method using chopped glass fibers and the resin formulation having 20 wt% of MATPCL. Thickening behavior, molding characteristics, mechanical properties and fracture behavior of the prepared sheets were determined and compared with the sheets made from non-modified UP resin.

* Mail address: M. Esfandeh, Iran Polymer & Petrochemical Institute, P. O. Box 14965/115, Tehran, Iran
Received: 2003-2-12
Accepted: 2003-2-23
Published Online: 2013-06-06
Published in Print: 2003-05-01

© 2003, Carl Hanser Verlag, Munich

Articles in the same Issue

  1. Editorial
  2. Fourteenth in a Series: Heinz List and his Family of Continuous Mixing Machines
  3. Screw Extrusion
  4. Influence of Non-Newtonian Behaviour on the Processing Characteristics of Wall-slipping Materials
  5. Neural Network Approach to Density Control of Rigid PVC Foam in Extrusion Process
  6. Investigation of Melting Phenomena in Modular Co-rotating Twin Screw Extrusion
  7. Mixing and Compounding
  8. Montmorillonite Co-intercalated with Octadecylamine and Stearic Acid by Low Temperature Melting and its Influence on PP Nanocomposites
  9. Analysis and Optimization of Kenics Static Mixers
  10. Electret-thermal Analysis of Polymer Blends
  11. Effects of Zinc Fatty Acids on Improved Polymer Processing for Critical Extrusions
  12. Flexible Sheet Molding Compound (SMC) Using Aliphatic Polyester as Cross Linker
  13. Co-Extrusion
  14. Investigation of the Interfacial Instabilities in the Coextrusion Flow of PE and PS
  15. Film
  16. Radiant Heating of Plastics: Application to Film Blowing Processes
  17. Injection Molding
  18. Measurement and Prediction of Temperature Distribution in an Injection Molding Cavity
  19. A Study of Processing Conditions on the Properties of Diffraction Optical Elements by Injection/Compression Molding Process
  20. Flow Behavior of Sandwich Injection Molding in Sequential and Simultaneous Injection
  21. Rotational Molding
  22. Rotational Moulding and Powder Processing of Natural Fibre Reinforced Thermoplastics
https://doi.org/10.3139/217.1739

Articles in the same Issue

  1. Editorial
  2. Fourteenth in a Series: Heinz List and his Family of Continuous Mixing Machines
  3. Screw Extrusion
  4. Influence of Non-Newtonian Behaviour on the Processing Characteristics of Wall-slipping Materials
  5. Neural Network Approach to Density Control of Rigid PVC Foam in Extrusion Process
  6. Investigation of Melting Phenomena in Modular Co-rotating Twin Screw Extrusion
  7. Mixing and Compounding
  8. Montmorillonite Co-intercalated with Octadecylamine and Stearic Acid by Low Temperature Melting and its Influence on PP Nanocomposites
  9. Analysis and Optimization of Kenics Static Mixers
  10. Electret-thermal Analysis of Polymer Blends
  11. Effects of Zinc Fatty Acids on Improved Polymer Processing for Critical Extrusions
  12. Flexible Sheet Molding Compound (SMC) Using Aliphatic Polyester as Cross Linker
  13. Co-Extrusion
  14. Investigation of the Interfacial Instabilities in the Coextrusion Flow of PE and PS
  15. Film
  16. Radiant Heating of Plastics: Application to Film Blowing Processes
  17. Injection Molding
  18. Measurement and Prediction of Temperature Distribution in an Injection Molding Cavity
  19. A Study of Processing Conditions on the Properties of Diffraction Optical Elements by Injection/Compression Molding Process
  20. Flow Behavior of Sandwich Injection Molding in Sequential and Simultaneous Injection
  21. Rotational Molding
  22. Rotational Moulding and Powder Processing of Natural Fibre Reinforced Thermoplastics
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