Macromol. Chem. Phys. 8/2007

Abstract

Cover: Sequential anionic copolymerization opens access to the world of block copolymers. Plenty of microphase morphologies can be created especially with triblock systems. Moreover, when ferrocene is involved, special optical and electronic properties can be achieved, and no staining is required for TEM. Further details can be found in the Full Paper by C. Kloninger and M. Rehahn* on page 833.

Silacyclobutane‐Based Diblock Copolymers with Vinylferrocene, Ferrocenylmethyl Methacrylate, and [1]Dimethylsilaferrocenophane

“…a a The inverse procedure is possible as well in this case, as we can conclude from previous studies on other PFS‐based block copolymers 34–39…”

“…THF, n‐ hexane, and LiCl were dried and deoxygenated following standard procedures. FS 1 ,34–39 FMMA 3 ,20 and vinylferrocene (VFc) 5 23 were synthesized and purified as reported elsewhere. n ‐BuLi (1.6 M solution in n ‐hexane) was used as the initiator for anionic chain growth.…”

Defined Poly[styrene‐block‐(ferrocenylmethyl methacrylate)] Diblock Copolymers via Living Anionic Polymerization

“…During the course of earlier TEM studies on silaferrocenylene-based block copolymers, [23][24][25][26][27] we had learned that dichloromethane is an appropriate solvent for casting films of ferrocene-containing macromolecules. Therefore, we prepared a series of film samples of the new PS-b-PFMMA materials from the same solvent, having compositions M PS / M PFMMA (in kDa) of 10/100, 6/10, 12/ 25, 27/36, and 48/85.…”

A Novel Crystallization Scheme in Poly[styrene‐block‐(ferrocenyl dimethylsilane)] Diblock Copolymers

“…For complementary studies, moreover, block copolymers would be highly valuable which are composed of a non‐crystallizing A‐block and a crystallizing B‐block where i) both blocks have their glass transition temperatures ( T g s) below the crystallization temperature ( T c ) of the crystallizing one, ii) the B‐block only shows moderate rates of nucleation and crystal growth, and iii) the copolymer allows high‐resolution transmission electron microscopy (TEM) and X‐ray scattering measurements without staining and thus in‐situ monitoring of B‐block crystallization. Poly(ferrocenyl dimethylsilane) (PFDMS)28–39 might act as such a novel crystallizing B‐block system: PFDMS has already attracted much attention as a result of its (opto)electronic and redox properties, because it can be converted into ceramic and magnetic materials, and because it is available by living anionic polymerization which provides access to plenty of well‐defined copolymer architectures 34–54. Another special feature of PFDMS is its low rate of nucleation and crystal growth.…”