Synthesis and properties of novel functionally substituted carbosilane polymers

Abstract

3'-(phenyloxy)propyl]-i-silabutane], and poly [l-methyl-l-[3'-(pentafluorophenyl)propyl]-l-ailabutane] have been prepared by the platinum-catalyzed hydrosilation graft reactions between poly(l-methyl-l-silabutane) and the appropriate functional alkene. These polymers have been characterized by , 13C, 19F (where appropriate), and "Si NMR as well as by FT-IR and UV spectroscopy. The molecular weight distributions

Anionic Grafting to Strategies for Functional Polymethacrylates: Convenient Preparation of Stimuli‐Responsive Block Copolymer Architectures

“…One convenient strategy for the introduction of functional groups focuses on the postmodification of BCPs. For instance, polystyrene‐ block ‐polyisoprene (PS‐ b ‐PI), polystyrene‐ block ‐polybutadiene (PS‐ b ‐PBd), and polysiloxane‐based BCPs can be used for this purpose and pendant functional moieties can be introduced by hydrosilylation, hydroboration, or thiol‐ene chemistry . As a result, subsequent grafting to protocols for the BCPs lead to grafted, comb, or dendritic BCPs .…”

“…For instance, polystyrene-block-polyisoprene (PS-b-PI), polystyrene-block-polybutadiene (PS-b-PBd), and polysiloxanebased BCPs can be used for this purpose and pendant functional moieties can be introduced by hydrosilylation, hydroboration, or thiol-ene chemistry. [39][40][41][42][43][44][45][46][47][48][49][50][51][52] As a result, subsequent grafting to protocols for the BCPs lead to grafted, comb, or dendritic BCPs. [53][54][55][56][57] As one prominent example, grafting methodologies can be applied for poly butadiene (PBd) with, for instance, PS or PBd macro anions by anionic polymerization after functionalization of the PBd backbone with chlorosilane moieties, which were introduced by hydrosilylation.…”

A convenient synthesis strategy for microphase-separating functional copolymers: the cyclohydrocarbosilane tool box

“…4 Furthermore, block copolymers and architectures thereof can consist of so-called stimuli-responsive polymers i.e., polymers which are capable of changing their conformation, solubility, or even break or form covalent bonds caused by different external triggers such as the change of temperature, pH value, light, redox reagents or electrical field. [35][36][37][38][39][40][41][42][43] There, especially the group of Frey succeeded in the formation of various functional polycarbosilanebased architectures by using convenient hydrosilylation protocols. There, the inorganic block segmentalso referred to as preceramic block segmentis directly converted into the ceramic material after thermal treatment maintaining the block copolymer-templated nanostructure.…”

Immobilization of Poly(1,1-dimethysilacyclobutane) by Means of Anionic Ring-Opening Polymerization on Organic Nanoparticles and Reinvestigation of Crystallization

“…The latter method has the advantage that well-defined hyperbranched materials can be obtained with high ceramic yields after pyrolysis. A postmodification of more intensively investigated polymers, e.g., polyisoprene or poly(ethylene oxide) (PEO) and also unsaturated PCS via hydrosilylation is a feasible strategy to introduce pendant side groups with additional functionalities [15][16][17][18][19][20]. The above mentioned synthetic strategies suffer from the disadvantages that well-defined PCS with respect to narrowly distributed high molar masses cannot be obtained, as well as it is impossible to gain block copolymer structures.…”