Copolymer pseudo-block

Binder WH, Bemstorff S, Kluger C, Petraru L, Kunz MJ. Tunable materials from hydrogen-bonded pseudo block copolymers. Adv Mater 2005 17 2824-2828. 

Fig. 18 Formation of pseudo-block copolymers consisting of poly(isobutylene)-poly(ether-ketone) telechelics held together by triple hydrogen bonds...

Fig. 45 Pseudo-block copolymers associated via multiple hydrogen bonds and their temperature behavior in correlation to microphase separation of the PIB and PEK-telechelics, respectively...

The hydrogen bonding-based pseudo block copolymers considered were based on hydrogen bonding between end groups of different polymers to... 

The phase diagram in Fig. 15 is a prediction of thermodynamic equilibrium however, the process path of a sample intuitively affects the observed phase. For example, if end-functionalized polymers are miscible in the melt, then microphase separation could occur upon cooling. However, if macroscopic phase separation occurs first, then pseudo block copolymers can only form at the interface of a phase-separated mixture, further blocking the molecular transport required for structure formation. If both free and dimerized homopolymer are present during phase separation or microphase segregation, then the length scale of phase segregation/... 

Polymer crystallization within supramolecular pseudo block copolymers is sensitive to many factors, including the type, length, and physical state of the complementary block. Many of the same issues are relevant to crystallization within block copolymer nanoconfinement [103] however, pseudo block systems can experience macrophase separation [35], and end groups can act as nuclei. UmavelUng how reversible bond dynamics affects nucleation as well as the type, extent, and direction of crystallization is a major step in establishing control of the... 

Binder WH, Kunz MJ, Ingolic E (2004) Supramolecular poly (ether ketone)-poly isobutylene pseudo-block copolymers. J Polym Sci Polym Chem 42(1) 162-172... 

Ostas E, Schroter K, Beiner M, Yan TZ, Thum-Albrecht T, Binder WH (2011) Poly(epsilon-caprolactone)-poly(isobutylene) a crystallizing, hydrogen-bonded pseudo-block copolymer. J Polym Sci Polym Chem 49(15) 3404—3416... 

Pseudo-Block Copolymers or Supramolecular Block Copolymers... 

Figure 34.19 Hydrogen-bonded supramolecular or pseudo" block copolymers BCPl and BCP2, as investigated by Binder and coworkers. (Reprinted with permission from Ref. [88] 2004, Wiley-VCH.)...

Figure 3.5 Attachment of complex hydrogen-bonding systems to bis-telechelic PIB prepared by LCCR (Reprinted with permission from W.H. Binder, MJ. Kunz, C. Kluger et aL, Synthesis and analysis of telechelic polyisobutylenes for hydrogen-bonded supramolecular pseudo-block copolymers, Macromolecules, 37, 5, 1749-1759, 2004. 2004 American Chemical Society.)...

Binder, W.H., Bemstaff, S., Huger, C. et al. (2005a) Thnable materials from hydrogen-bonded pseudo block copolymers. Advanced Materials, 17,2824—2828. 

Binder, W.H., Kunz, M.J., and Ingolic, E. (2004a) Supramolecular poly(ether ketone)-polyisobutylene pseudo-block copolymers. Journal of Polymer Science Part A-Polymer Chemistry, 42,162-172. 

Rearranging and solving for f, gives a value of 85% butadiene in the polymer. In fact, this method is used commercially to form a pseudo-block copolymer, since once the butadiene is used up, then only styrene is added to the living end of the growing polymer chain. Similarly, using the reactivity ratios for a radical polymerization, then a polymer with 58% butadiene is produced. 

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