Polymerization of an epoxy‐containing silacyclobutane and its application to networked polymer synthesis

Abstract

Polymerization of a silacyclobutane having an epoxy moiety and its application to networked polymer synthesis were examined. Four-membered ring-opening polymerization of silacyclobutane having a 3,4-epoxybutyl group on the silicon atom (OBMSB) was achieved by using a platinum vinyldisiloxane complex with keeping the epoxy ring unchanged. Copolymerization of 1,1-diethylsilacyclobutane (DESB) with OBMSB by using the same catalyst effectively gave the corresponding copolymers [poly(DESB-co-OBMSB)]. Thermal properties of the polyOBMSB, polyDESB, and poly(DESB-co-OBMSB) were investigated by DSC and TGA. Cast films of the obtained polymers with 1naphthylmethylmethyl-p-hydroxyphenylsulfonium hexafluor-oantimonate, a small amount of thermally latent acid generator were prepared. Heating the films at 80 C for 2 h gave crosslinked networked polycarbosilanes through cationic ring-opening of the epoxy moieties. Thermal and mechanical properties of the networked polymers were investigated by TGA, DSC, and tensile strength measurements.

Advances in the Synthesis of Preceramic Polymers for the Formation of Silicon-Based and Ultrahigh-Temperature Non-Oxide Ceramics

“…Silacyclobutane rings with Si−Cl side groups can be synthesized through Grignard chemistry and further functionalized to contain various chemical moieties. Some examples include 5membered cyclic carbonates for electrolyte applications, 157,158 carbohydrate derivatives for bioapplications, 159,160 epoxyfunctionalized polycarbosilanes for elastomer development, 161 and styrene or benzocyclobutene derivative low-dielectric insulating materials. 162 BCPs continue to be an area of interest, particularly synthesizing polystyrene/polycarbosilane blocks through anionic ROP, as they can undergo phase separation into microdomains.…”

Synthesis and Properties of Polycarbosilanes Having 5-Membered Cyclic Carbonate Groups as Solid Polymer Electrolytes

“…Polycarbosilanes have many unique properties such as high flexibility, excellent thermal stability, chemical and electrochemical stability, , so they can be potential key polymers for novel functional materials. We recently reported applications of polycarbosilanes to prepare gel polymer electrolytes for lithium ion batteries and to other soft network-forming materials. , We have also investigated polycarbosilanes having sugar-derived structures in the polymer side chains and evaluated whether they could be used as biocompatible materials …”

“…We recently reported applications of polycarbosilanes to prepare gel polymer electrolytes for lithium ion batteries 16 and to other soft network-forming materials. 17,18 We have also investigated polycarbosilanes having sugarderived structures in the polymer side chains and evaluated whether they could be used as biocompatible materials. 19 Polycarbosilanes having 5-membered cyclic carbonate groups in their side chains are expected to be good candidates of new SPE matrices.…”

Synthesis of polycarbosilanes having sugar-derived structures as novel materials for cell cultivation

“…Some polycarbosilanes have been known as ceramic precursors . We have recently reported their applications to gel polymer electrolytes for lithium ion batteries and to other soft network‐forming materials . Furthermore, polycarbosilanes have been considered to be bioinactive and be used for biocompatible materials.…”

“…3 We have recently reported their applications to gel polymer electrolytes for lithium ion batteries 4 and to other soft network-forming materials. 5 Furthermore, polycarbosilanes have been considered to be bioinactive and be used for biocompatible materials. For example, carbosilane dendrimers modified with amines or ammonium, 6,7 poly(ethylene oxide), 8 and sugar-derived moieties [9][10][11][12] were investigated.…”