Initiator Integrated Poly (Dimethylsiloxane) and Methods for Making the Same and Its Application

Abstract

Disclosed herein is an initiator integrated polydimethylsiloxane (iPDMS). The iPDMS is a polydimethylsiloxane undergoing a hydrosilylation reaction. The initiator 10-undecenyl 2-bromo-2-methyl propionate is integrated on the surface of iPDMS by covalent bond. At % is 0.01-1% confirmed by X-ray photoelectron spectroscopy. Disclosed herein is a method for making an initiator integrated polydimethylsiloxane. Prepolymer A, cross-linker B and vinyl-terminated initiator C were mixed below a ratio of 10:1:4-0.01 for 6-24 hours, then the elastomer was formed. And, disclosed herein is functional surface modification of initiator integrated polydimethylsiloxane and its applications for biocompatibility, organic solvent compatibility and heat-sensitive materials.

1 . A method of making a polydimethylsiloxane carrying an initiator on its surface comprising the steps of:
 mixing prepolymer A, cross-linker B and vinyl-terminated initiator C with a weight ratio of 10:1:4-0.01 causing a hydrosilylation reaction;   keeping said mixture for 6-24 hours to form polydimethylsiloxane carrying an initiator on its surface, which results from the hydrosilylation reaction,   wherein said prepolymer A is polydimethyl-methylvinylsiloxane, said cross-linker B is vinyl-endcapped polydimethyl-methylvinylsiloxane or, polydimethyl-methylhydrogenosiloxane, and said vinyl-terminated initiator C referred is 10-undecenyl 2-bromo-2-methylpropionate.   
     
     
         2 . A functional polydimethylsiloxane which is obtained by carrying out Si-Atom Transfer Radical Polymerization of oligo(ethylene glycol) methyl methacrylate, 1H, 1H, 2H,2H-perfluorodecyl methacrylate, or N-isopropylacrylamide from iPDMS, wherein iPDMS results from a hydrosilylation reaction, with 10-undecenyl 2-bromo-2-methyl propionate in 0.01-1At % being fixed on its surface through covalent bond. 
     
     
         3 . A functional polydimethylsiloxane which is obtained by carrying out SI-ATRP of 1H, 1H, 2H, 2H-perfluorodecyl methacrylate from iPDMS, wherein iPDMS results from a hydrosilylation reaction, with 10-undecenyl 2-bromo-2-methyl propionate in 0.01-1 At % being fixed on its surface through covalent bond. 
     
     
         4 . A functional polydimethylsiloxane which is obtained by carrying out SI-ATRP of poly(N-isopropylacrylamide) from iPDMS, wherein iPDMS results from a hydrosilylation reaction, with 10-undecenyl 2-bromo-2-methyl propionate in 0.01-1 At % being fixed on its surface through covalent bond.