摘要
An novel compounding process using nano-CaCO_(3) aqueous suspension for preparing polymer/nano-CaCO_(3) composites with nanoparticles dispersed at the nanoscale is reported.The process is called the mild mixing method.In this method,the pre-dispersed nano-particle suspensions are blended with melting polymers in a weak shearing field using an extruder,followed by removing the water from the vent.The four typical poly-meric nanocomposites were prepared by mild mixing method.The dispersion of nano-CaCO_(3) in the matrix of the polymer at the nanoscale was confirmed by scanning electron microscopy(SEM).The molecular weights of polycarbonate(PC)and its nanocomposite showed that the degradation had not occurred during the mild mixing processing.The mechanical properties of the composite with 1.5 wt-% nano-CaCO_(3) improve slightly.It proved that this approach is suitable for the preparation of nano-composites based on both polar and non-polar polymers.
基金
The authors gratefully acknowledge the financial support from the National Natural Science Foundation of China(Grant No.10590351)
Sichuan University Youth Science Foundation(Grant No.06007).
