1 Department of Polymers and Composites, RISE Research Institutes of Sweden SE-501 15 Borås, Sweden; Department of Fibre and Polymer Technology, KTH Royal Institute of Technology SE-100 44 Stockholm, Sweden.
2 Department of Polymers and Composites, RISE Research Institutes of Sweden SE-501 15 Borås, Sweden.
3 Department of Fibre and Polymer Technology, KTH Royal Institute of Technology SE-100 44 Stockholm, Sweden. Electronic address: mikaelhe@kth.se.