Novel phosphate glass/polyamide 6 hybrids: Miscibility, crystallization kinetics, and mechanical properties

Abstract

The miscibility, crystallization kinetics, and mechanical properties of a novel low T g phosphate glass (Pglass)/polyamide 6 hybrid material were investigated. Here, we report the first evidence for miscibility of inorganic phosphate glass and organic polymer prepared by blending both components in the liquid phase using conventional polymer processing methods. From classical melting point depression measurements, we obtained a chi interaction parameter (v) of À0.067 for the Pglass/polyamide 6 hybrid, indicating that the inorganic glass and polyamide 6 are miscible. The crystallization kinetic parameters for the hybrids were determined using the Avrami approach and found to depend on the volume fraction of Pglass present in the system. In addition, we studied both the dynamic and static mechanical behavior of the hybrids. The results showed a single T g that decreased by up to 10 8C with increasing phosphate glass volume percent for the hybrids, giving further evidence for the hybrid component miscibility and plasticizing action of the phosphate glass in the pure polyamide 6, respectively. The tensile (static) mechanical properties of the hybrids were found to be remarkably similar to those obtained from typical polymers plasticized with relatively low molecular weight compounds. V V C 2005 Wiley Periodicals, Inc. J Polym Sci Part B: Polym Phys 44: 441-450, 2006

The effect of Pglass state on the non-isothermal cold and melt crystallization processes of PET matrix

“…It was found that with the addition of Pglass into PET matrix, the values of T g , T oc and T cc of the PET/Pglass blends decreased at a given heating rate. The decreasing of T g values may arise from the plasticizing effect of Pglass which has been reported in the PA6/Pglass blend system [6]. In addition, the values of T m increased slightly with the addition of Pglass, indicating Pglass may induce the formation of thicker PET lamellae.…”

“…What is more, there is no intractable viscosity and dispersity problem which usually accompanys with composites processing with fillers such as talc, clay and glass fiber [3]. Several polymers such as PP [4], LDPE [5] and PA6 [6] have been successfully blent with Pglass for the production of novel hybrids.…”

Study of the effects of melt blending speed on the structure and properties of phosphate glass/polyamide 12 hybrid materials

“…This experimental observation is consistent with reported studies on Pglass/LDPE and Pglass/Polyamide 6 hybrid systems, where it was shown that the Pglass inhibited crystallite formation. 19,28,29 It is believed that the Pglass is acting similarly in the hybrid system of the present study and is a common feature of hybrid systems. The effect of melt-mixing speed on the percentage crystallinity is negligibly small.…”

“…Furthermore, because of the partial miscibility of the constituent phases, the local properties can vary in a nontrivial manner across the interfaces. 3,22,29 It is precisely a combination of all these factors that brings about the interesting and advantageous properties of the present hybrids. But it is also the same factors that make it so difficult to develop accurate theoretical equations for predicting the properties of the hybrids.…”

Bio-polyamides based on renewable raw materials

“…The prominent peak above 50°C is typically attributed to the dynamic glass transition [56,57], although some authors dispute it [51]. We will come back to this point, in light of the results by the stochastic modulated DSC results.…”