Rheological Behavior Of The Tin Fluorophosphate Glass/ Polymer Hybrid Materials

II Due to the low glass transition temperature(Tg) and superior processing performance, tin fluorophosphate glass(TFP) attracted much interest in recent years. The main research of TFP was focused on the isothermal and non-isothermal crystallization kinetics, melting behavior, compatibility, etc., but less on its rheological behavior research. This dissertation explored rheological behavior of TFP-polymer hybrid materials. Contrast the rheological behavior of three different inorganic filler TFP, Ca CO3 and Ca Si O3 filled PA6 matrix. And further explore the rheological behavior of TFP filling low liquidity matrix PC and GF-PA6 composites.Comparison the rheological behavior of three different filler TFP, Ca CO3, Ca Si O3 filling PA6 shows that TFP, Ca CO3 and Ca Si O3 have had different effects on the rheological behavior of PA6. PA6 with a small amount of TFP filled performed a decrease of modulus and complex viscosity, while Ca CO3 and Ca Si O3 filling system showed an increase of modulus and complex viscosity. Further more, TFP filling system showed a significant shear thinning behavior, which indicated that the improvement of the processing performance of materials. Ca Si O3 and Ca CO3 distributed irregularly in the PA6 matrix, while TFP with tiny glass beads embedded in the PA6 matrix. IR spectrum revealed the presence of hydrogen bonding interactions of PA6, and there have been no chemical interaction between Ca Si O3 or Ca CO3 and PA6 molecules. Because of the particular interaction between TFP and PA6, the addition of TFP reduced Tm and Tc, and with little shift of Tm and Tc in Ca Si O3, Ca CO3 filling system.The study of TFP-PC hybrids showed that TFP have had a large extent affected the rheological behavior of the hybrids. The storage modulus of the material increased at the low frequency, while loss modulus of hybrids with TFP content less than 30% displayed a decrease at the low frequency. With the addition of TFP the complex viscosity of PC decreased and a shear thinning behavior occurs. The complex viscosity of hybrids appeared a sharply increase as TFP content more than 30%, however, the shear thinning was enhanced. SEM graphs of TFP and hybrids revealed that TFP particles deformed during the processing. TFP particles dispersed as tiny glass beads in the PC matrix, and the interface layer blurred. But the agglomeration occured at higher TFP content. IR absorption of hybrids bright light on that there have been hydrogen bonding interactions existing between TFP and the PC. Furthermore, DSC results indicated that TFP played as a plasticizer to PC.The effect of TFP to the rheological behavior of GF-PA6 composites have been studied as well. The filling of TFP raised the storage modulus, loss modulus, complex viscosity of GF-PA6 composite system at low frequencies. However with the increase of frequency the tendency decreased, the storage modulus, loss modulus, complex viscosity of ternary TFP-GF-PA6 composites decreased with the increase of TFP contents. The rheological parameters of each material showed strong frequency dependence. Materials showed a significant shear thinning behavior. The processing performance of the composites has been significantly improved. Composites with TFP contents reached 50% shown agglomeration phenomenon, while TFP distributed as small beads in the composites with TFP less than 30%. Incorporated GF in the matrix did not affect hydrogen bonding interactions between TFP and PA6. The addition of TFP reduced the Tm and Tc of the composite system, and the crystallization rate of the material decreased as well.