Antagonistic immiscibility

The shear-induced interlayer slip was theoretically predicted — it creates a tree-ring structure in the extrudates [Utracki et al., 1986 Utracki, 1991b Bousmina et al., 1999]. The relation may be used to describe the steady-state viscosity of antagonistically immiscible polymer blends, such as PP/LCP [Ye et al., 1991 Utracki, 1991b]. 

PS is antagonistically immiscible with all other engineering resins, viz. PA, PC, POM, and PEST. PS has been added to these polymers to improve processability and reduce cost without unduly affecting the performance (the so-called, extension of the engineering performance ). 

PMMA is antagonistically immiscible with a polyolefins — blends of this type have been used in non-critical applications, viz. PP/PMMA blends with EVAc were used as plastic-paper [Yamamoto et al., 1971], while those with PVC (or CA) as wood-like materials [Yahata et al., 1971]. For more demanding applications, either PO should be blended with an acrylic copolymer comprising a PO block, or PO should be grafted with acrylic moieties. Examples of the PO/Acrylics blends are listed in Table 1.36. 

Blends of PP/PEST are at an early stage of development. PP is antagonistically immiscible with PEST, and when the concentration of the dispersed phase exceeds 5-10 wt% compatibiliza-tion is necessary. Initially, the uncompatibilized... 

PP/POM blends are antagonistically immiscible, not available on the market. The early blends contained a small amount of one resin in another, viz. either PP or LDPE, with 1-10 wt% POM showed improved processability, good appearance and improved performance [Rudin and Schreiber, 1964]. However, blends containing higher concentration of ingredients must be compatibilized, viz. by addition of muconic acid-grafted PP [Chen et al., 1991], or by TPU and EBA-GMA [Subramanian, 1992]. 

PP/POM blends are antagonistically immiscible, not available on the market The early blends contained a small amount of one resin in another, viz., either PP or LDPE, with 1—10 wt% POM showed improved processability, good appearance. 

In discussing the elongational flow behavior of polymer blends, the difference between single-phase (homopolymer or miscible blend) and multiphase (antagonistically immiscible PE/PS blend) was demonstrated in Eigures 2.12 and 2.13,... 

The miscibility stretches from highly miscible pairs (e.g., low MW blends of PS with PVME showing high negative value of the binary thermodynamic interaction parameter, Xi2 0)5 to antagonistically immiscible mixtures, viz. PE/PA, where X12 Performance of the materials at either end of the miscibility scale is poor. ITie singlephase miscible blends are usually brittle and must be compounded either with an... 

Mixtures of polyolefins and polystyrene - relevant components in the packaging plastics waste recycling problem - are antagonistically immiscible. The phase diagram... 

The performance of polymer blends largely depend on the degree of dispersion. For example, mixtures of PO and PS are antagonistically immiscible. Their blends have coarse phase morphology and poor mechanical properties [8]. However, the morphology and performance can be enhanced by a judicious selection of the compatibilization method. 

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