Halato-telechelic polymers. 12. Block copolymerization of polystyrene and polybutadiene via ionic interactions

Comb-like polymer blends of poly(oxyethylene)s with CH3-terminated and CF3-terminated alkylsulfonylmethyl side chains: Effect of terminal CF3 moiety on the surface properties of the blends

“…Therefore, our blend system exhibits no LCST behavior. Teyssie and coworkers also reported polymer blend systems having both miscible and immiscible regions; three T g s were observed when a,x-carboxylic acid polystyrene was mixed with a,x-diamino polybutadiene and was explained in terms of the close contact afforded by the proton transfer between the carboxylic acid end groups and dimethyl amino end groups [36]. The 60/40 and 80/ 20 blends in the present study have two distinct T g s corresponding to the CH 3 -10SE and CF 3 -10SE regions, indicating that their amorphous regions are immiscible in these compositions.…”

Supramolecular thermoplastics and thermoplastic elastomer materials with self-healing ability based on oligomeric charged triblock copolymers

“…The material properties of the individual triblock copolymers and their mixtures were characterized by thermogravimetric analysis, MTDSC, DMA and dynamic rheometry ( Figures 3,4 and 5). Earlier work by Horrion et al 33 on mixtures of telechelic polymers with charged end groups revealed that significant aging effects had a role, as well as the thermal history. In our samples, the thermal properties of the mixtures did not change in consecutive heating and cooling cycles (after the first heating run), and the results obtained in the second heating runs will be discussed in the following.…”

“…Even relatively weak hydrogen bonds in combination with phase segregation can form a rather strong network from low-molecular-weight components. 28 Even though supramolecular networks based on electrostatic interactions in the form of hydrogels based on mixtures of high molar mass triblock copolymers [29][30][31][32] , as well as the use of ionic interactions to facilitate blending of immiscible polymers having a charged end group have been reported, [33][34][35][36][37] we are not aware of examples of bulk supramolecular materials with phase separated charged nanodomains based on oligomeric triblock copolymers. As there is a significant difference in chain mobility between hydrogels and bulk materials, similar types of interactions may lead to very different material properties and it cannot simply be assumed that using such charged triblock copolymer materials also leads to dynamic bulk materials.…”

Synthesis and properties of liquid-crystalline polyetherurethane cationomers

“…3). The soft segment T g 's are considered to be 10 8C above their DSC-determined T g 's; this difference has been observed between the two techniques under the conditions of analysis used [36,37]. Figure 3 shows that the effect of ion incorporation on the soft segment T g depends on the nature of the LCMQAs and the degree of quaternization.…”