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Deformation of dispersed PA66 phase in drawn PA66/SAN blend

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Abstract

Polyamide 66/styrene acrylonitrile (PA66/SAN) drawn strands were prepared by stretching the corresponding extrudates at 130 °C. During stretching, the PA66 droplets in the extrudate are deformed as a result of the stretching-induced stress. In drawn strands, the morphology of the deformed PA66 is greatly affected by the morphology of the PA66 dispersed phase in the extrudate as well as by the interfacial adhesion between the PA66 and SAN matrix. Upon stretching, the cylindrical PA66 threads in the uncompatibilized extrudate [styrene acrylonitrile maleic anhydride (SANMA) as compatibilizer] deform into PA66 fibrils with large aspect ratio, while the small spherical PA66 droplets are only slightly deformed. Interfacial adhesion between the PA66 and SAN is improved in the compatibilized PA66/SAN extrudate. Consequently, despite the small diameter, PA66 droplets in the compatibilized blend are greatly deformed during stretching.

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Acknowledgment

This work was finished in the frame of RLP Graduate School of Excellence and additionally supported by BASF SE.

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Authors and Affiliations

  1. Institut für Verbundwerkstoffe (Institute for Composite Materials), University of Kaiserslautern, Erwin Schrödinger Str., 67663, Kaiserslautern, Germany

    Wenjing Li

  2. Chair of Composite Engineering, University of Kaiserslautern, Gottlieb Daimler Strasse, Gebäude 44, 67663, Kaiserslautern, Germany

    Alois K. Schlarb

  3. BASF SE, Polymer Research Division, Engineering Plastics GKT/B – B1, Carl-Bosch-Str. 38, 67056, Ludwigshafen, Germany

    Martin Weber

  4. Laboratory on Polymers, Sofia University, 1126, Sofia, Bulgaria

    Michael Evstatiev

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  1. Wenjing Li
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  2. Alois K. Schlarb
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Correspondence to Wenjing Li.

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Li, W., Schlarb, A.K., Weber, M. et al. Deformation of dispersed PA66 phase in drawn PA66/SAN blend. Polym. Bull. 64, 483–495 (2010). https://doi.org/10.1007/s00289-009-0216-y

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  • DOI: https://doi.org/10.1007/s00289-009-0216-y

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