Get access

In situ control of co-continuous phase morphology for PS/PS-co-TMI/PA6 blend

Authors

  • Cai-Liang Zhang,

    1. State Key Laboratory of Chemical Engineering, Department of Chemical and Biological Engineering, Zhejiang University, Hangzhou, People's Republic of China
    Search for more papers by this author
  • Tao Zhang,

    1. State Key Laboratory of Chemical Engineering, Department of Chemical and Biological Engineering, Zhejiang University, Hangzhou, People's Republic of China
    Search for more papers by this author
  • Lian-Fang Feng

    Corresponding author
    1. State Key Laboratory of Chemical Engineering, Department of Chemical and Biological Engineering, Zhejiang University, Hangzhou, People's Republic of China
    Search for more papers by this author

ABSTRACT

The emulsification efficiency of PS-co-TMI, a copolymer polymerized by styrene and 3-isopropenyl-α,α-dimethylbenzene isocyanate (TMI), for polystyrene (PS)/polyamide 6 (PA6) blend was studied. During the mixing process, an effective emulsifier PS-g-PA6 was generated, which was demonstrated by differential scanning calorimetry (DSC) and fourier transform infrared spectroscopy. PS-g-PA6 generated by PS-co-TMI with high TMI content was found to contain some unreacted isocyanate active groups which reduced using efficiency of PS-co-TMI. Irrespective of TMI content in PS-co-TMI, the dosage of PS-co-TMI reached 20 wt %, unreacted PS-co-TMI was detected. These results indicated that reactive emulsification limits for both active groups' content and reactive precursors' dosage. After the rational addition of PS-co-TMI into PS/PA6 system, phase sizes of co-continuous structure were reduced conspicuously. However, co-continuous structure was evolved into matrix-dispersed structure while the dosage of PS-co-TMI reached 20 wt %. Emulsification efficiencies of PS-co-TMI with different TMI contents, 2.2, 4.1, and 7.5 wt %, were compared. The results revealed PS-co-TMI with 2.2 wt % TMI content had the highest reactive emulsification efficiency because of the block-copolymer-inclined emulsifier generated in the mixing process. © 2013 Wiley Periodicals, Inc. J. Appl. Polym. Sci., 2014, 131, 39972.

Get access to the full text of this article

Ancillary