Development of partial miscibility in polycarbonate/polypropylene blends via annealing

Abstract

<jats:title>Abstract</jats:title> <jats:p>The morphology, dynamic mechanical properties and infrared spectra of polycarbonate (PC)/polypropylene (PP) blends were investigated. As expected, PC and PP were immiscible when blended together; however partial miscibility developed following annealing. The miscibility of one polymer in the other was examined using the modified Fox equation and the values of the Flory-Huggins polymer-polymer interaction parameter (<jats:italic>χ</jats:italic><jats:sub>12</jats:sub>) were also calculated following the Kim and Burns approach. Moreover, the possible causes for partial miscibility in the annealed PC/PP blends were explored by infrared spectroscopy. It was concluded that annealing caused degradation of PP, leading to the formation of polar groups which were then able to interact with PC generating regions of partial miscibility.</jats:p>

Synthesis of novel polycarbonate‐based thermoplastic polyurethane elastomers compatibilizers with octadecyl side chains and their application in PC/PP blends

“…When x is 1.5, the E' reaches the maximum value, indicating that the addition of TPU‐G1.5 can significantly improve the compatibility between PC and PP, which is consistent with the above results of mechanical properties and scanning electron microscope test. The interaction between the components of PC/PP/TPU‐Gx blends can be determined according to the compositional dependence of glass transition temperature (Tg) 12 . In Figure 10B, all PC/PP blends show two peaks that correspond to Tg of PC and PP, respectively.…”

“…Because of its low density, low cost, and superior comprehensive performance, PP has been one of the most common polyolefins with numerous applications 9 . Blending of PC with PP has been investigated for years, 9,11‐13 but the major problem is the immiscibility between PC and PP, for the obvious differences in polarity and solubility parameters between them 14 . Weak interfacial adhesion in the case of neat blends results phase separation, which in turn affects the mechanical properties 15 .…”

Partial Miscibility and Concentration Distribution of Two-Phase Blends of Crosslinked NBR and PVC

“…The dissimilar components in polymer blends can be estimated from the compositional dependence of the glass transition [ 19 , 20 ]. A single glass transition can be seen at intermediate temperatures between those of the component polymers in miscible polymer blends due to the cooperative segmental motion of the component polymers [ 21 ].…”

Phase-Separated Structure of NBR/PVC Blends with Different Acrylonitrile Contents Investigated Using STEM–EDS Mapping Analysis

“…Dissimilar polymers are only miscible via a favorable specific interaction between them, and most pairs of dissimilar polymers are phase-separated [ 1 , 2 , 3 , 4 ]. The degree of miscibility has been estimated from the glass transition, depending on the blend composition, using differential scanning calorimetry and dynamic mechanical analysis (DMA) [ 5 , 6 , 7 ]. A single glass transition is seen at intermediate temperatures between those of the component polymers in miscible blends, whereas two separate glass transitions are seen in phase-separated blends.…”