Journal of Materials Science

, Volume 44, Issue 12, pp 3248–3254 | Cite as

Latex derived blends of poly(vinyl acetate) and natural rubber: thermal and mechanical properties

  • Stephen S. Ochigbo
  • Adriaan S. Luyt
  • Walter W. FockeEmail author


Poly(vinyl acetate) (PVAc) and natural rubber blends (NR) were prepared by low shear blending of the corresponding lattices. Thin films were cast using a doctor blade technique. SEM and DMA confirmed the essential immiscibility of the two polymers. Even when the poly(vinyl acetate) forms the matrix phase, it still contains domains encapsulated by a rubber phase where particles that resemble the original latex are visible. This incomplete droplet coalescence of the poly(vinyl acetate) is attributed to the fact that the rubber latex droplets were an order of magnitude smaller than the poly(vinyl acetate) latex droplets. Tensile testing revealed a nonlinear dependence of tensile strength and elongation on blend composition. Surprisingly good tensile yield strengths were obtained at intermediate to high PVAc contents. Thermogravimetric analysis of degradation in air and nitrogen atmospheres indicated independent degradation of the parent polymers.


Natural Rubber Dynamic Mechanical Analysis PVAc Vinyl Acetate Emulsion Droplet 
These keywords were added by machine and not by the authors. This process is experimental and the keywords may be updated as the learning algorithm improves.



Financial support for this research from the Institutional Research Development Programme (IRDP) of the National Research Foundation (NRF), the University of the Free State and the University of Pretoria is gratefully acknowledged.


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Copyright information

© Springer Science+Business Media, LLC 2009

Authors and Affiliations

  • Stephen S. Ochigbo
    • 1
    • 2
  • Adriaan S. Luyt
    • 2
  • Walter W. Focke
    • 1
    Email author
  1. 1.Institute of Applied Materials, Department of Chemical EngineeringUniversity of PretoriaPretoriaSouth Africa
  2. 2.Department of ChemistryUniversity of the Free State (Qwaqwa Campus)PhuthaditjhabaSouth Africa

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