The Structure, Morphology And Properties Of (Phenylene Sulfide) (PPS)/isotactic Polypropylene (iPP) In-situ Microfibrillar Blend

This work, as a sub-project to prepare TP/TP in-situ microfibrillar blends through "melt extrusion-hot stretching-quenching" method, granted by National Science Foundation (No.50103007), is attempt to study the preparation, morphology, crystallization, rheology and mechanical properties of PPS/iPP in-situ microfibrillar blend, and the factors influence these properties will be investigated in detail.1) PPS/iPP in-situ microfibrillar blend could be successfully prepared via a "melt extrusion-hot stretching-quenching" process, and well defined PPS microfibrils could be obtained. The microfibrils characteristics, such as diameter and its distribution, were mainly dominated by the composition of the blend and hot stretch ratio (HSR). The microfibrils diameters became larger with the increase of the PPS concentration at a fixed HSR, but the minimum diameters remained constant, that is, the minimum diameter was independent of PPS concentration. The diameter of most PPS particles in the common blend was comparable to even larger than that of the PPS fibrils in the microfibrillar blend at the same PPS content. Increasing the HSR, the maximum diameter first increased and then decreased, while the minimum diameter remained invariable.2) the study of non-isothermal crystallization of PPS/iPP in-situ microfibrillar blend found that: the PPS microfibrils and spherical particles could act as...