A straightforward method to synthesize α,ω-telechelic poly(dimethylsiloxane)s.

M.S.LENCINA; C. MÜLLER; V. HANAZUMI; F. L. REDONDO; M.D. NINAGO; C. VITALE; M.A.VILLAR; A.E. CIOLINO

Simposio; Fifth International Symposium Frontiers in Polymer Science; 2017

In this work we report the synthesis of , telechelic PDMS by employing a novel bifunctional initiator, obtained from a commercial available siloxane precursor, poly(dimethylsiloxane) diglycidylether terminated (PDMS-DGE). The synthetic strategy involves the high-vacuum reaction of sec-BuLi+ with DPE, and subsequently with PDMS-DGE to promote the nuclephilic ring-opening of the epoxide ends. The resulting bifunctional initiator was then employed to polymerize hexamethly(cyclotrisiloxane) (D3) by using conventional anionic polymerization methods. From suitable terminating agents, silane (-SiH), vinyl (-CH=CH2), hydroxyl (-OH), trimethyl and even methacryloyl ended PDMS were obtained.