Crosslinked phases

C. Harrats and G. Groeninckx, Reactive processing of polymer blend using reactive compatibilisa-tion and dynamic crosslinking phase morphology control and microstructure-property reactions,... 

As mentioned earlier, the existence of an intermediate phase with slightly stiffer modulus than that of the rubber matrix was reported [Fukahori, 2005], determined by finite element calculation. The author reported that two phases surround CB particles one is closely comparable with bound rubber, a 2-nm-thick glassy phase (GH phase), the other is a 10-nm-thick non-crosslinked phase (SH phase). The intermediate regions observed in this study were usually observed around CB regions, and the Young s moduli of these regions were also higher. Thus, there is a possibility that we have observed the SH phase directly in real space for the first time. 

In the case of the peroxide crosslinked blends, the dynamic aspects probably prevent the crosslinking phase from becoming truly continuous since the material will flow. The final blend is thus thermoplastic and can be... 

These generally gave two-phase blends with PIB and butyl rubber. Properties vs polyblend ratio usually indicated that these phases were partially miscible solid solutions [77]. Crosslinked phases increased stability of morphology and properties [26]. Intensive studies of HDPE -I- Butyl blends gave bimodal peaks for melt viscosity and ultimate elongation vs blend ratio, which were explained by two continuous laminar/fibrillar phases [188]. 

Polyftert-butylamine sulfide) prepared from rm-butylamine and S2CI2 and poly(imine sulfide) prepared from amylamine and 8202 were found to be superior vulcanizing agents for rubbers compared to sulfur and other polyfalkylamine sulfides) [183,184]. Paushkin et al. [185-193] have done extensive studies on poly(amine sulfides). Cross-linked polyethylene, on heating at 150 °C for 75 h in air in the presence of polyfaniline disulfide), lost only 5% of the crosslinked phase in comparison to 100% in the absence of p[Pg.107]

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