Poly(phenylene sulfide) magnetic composites. II. Crystallization, thermal, and viscoelastic properties
作者：Wu, Defeng，Wu, Lanfeng，Gao, Fei，Zhang, Ming，Yan, Changhao
關(guān)鍵字：none
論文來源：期刊
具體來源：Polymer Engineering and Science
發(fā)表時間：2008年
Poly(phenylene sulfide)/ferrosoferric oxide composites
(PPS/Fe3O4) with various loading levels were prepared
by melt compounding. The crystallization, thermal, and
viscoelastic properties were characterized respectively
by the DSC, DMA, TGA and parallel plate rheometer.
The results reveal that the well-dispersed Fe3O4 particle
restricts the segmental motion of polymer chain,
leading to a remarkable increase of the glass transition
temperature and thermal stability of the PPS due to the
strong physical association and interactions between
particles and matrix. The presence of the Fe3O4 particles,
however, can not facilitate crystallization of PPS,
because the particles only play the role of inert filler
and have no heterogeneous nucleating effect. The
crystallization kinetics, as a result, decreases with
increasing particles loadings due to the increasing
restriction of the chain mobility and high viscosity. In
addition, the rheological percolated network of the
Fe3O4 particles is very sensitive to the steady shear deformation,
and also to the temperature. The network
structure is easily broken by the steady shear flow due
to the sharply reduced particle–particle interactions.
However, the percolation threshold reduces with
increase of temperature, because those interactions
are temperature-dependent.