Abstract

In order to solve the problems of the poor binding capacity, forming the aggregate easily between the surface of calcium
carbonate powder and SF/PVA blend system, causing the dispersion inhomogeneous in the organic blending system.
The CaCO3-filled SF/PVA blend films were prepared by blending solution with CaCO3 treated with titanate coupling
agent. According to IR, the introduction of titanate coupling agent was indeed to crosslink the CaCO3 with PVA and SF.
DSC showed that the compatibility of each component of blend films had obviously changed by adding of glycerin.
When the content of calcium carbonate was 5wt%, the improving of the tensile strength, elongation at break mechanical
properties and the stability of wet of blend films had obvious effect. In addition, when the content of titanate coupling
agent was 0.3wt%, the blend films exhibited a breaking strength of 45.26Mpa and 832.78% elongation at break,
dissolve-loss rates were 2.88%. After the content of titanate coupling agent increased, the mechanical properties
decreased and dissolve-loss rates increased gradually.

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