TY - JOUR

T1 - A metal-free radical technique for cross-linking of polymethylhydrosiloxane or polymethylvinylsiloxane using AIBN

AU - Deriabin, Konstantin V.

AU - Dobrynin, Mikhail V.

AU - Islamova, Regina M.

PY - 2020/7/14

Y1 - 2020/7/14

N2 - A new method was developed for the metal-free cross-linking of silicone rubbers. This process uses azobisisobutyronitrile (AIBN) to selectively react with Si-H and vinyl groups as a free-radical initiator for the thermal curing of polymethylhydrosiloxane (PMHS) and polymethylvinylsiloxane (PMVS). The AIBN-initiated curing reaction between the Si-H groups of PMHS generated Si-O-Si and Si-Si cross-links. In contrast, PMVS was cured via the formation of C-C bonds through "methyl-vinyl"and "vinyl-vinyl"mechanisms. Curing reactions were performed at 80-120 °C in air and confirmed by 13C and 29Si solid state NMR analyses and swelling trials.

AB - A new method was developed for the metal-free cross-linking of silicone rubbers. This process uses azobisisobutyronitrile (AIBN) to selectively react with Si-H and vinyl groups as a free-radical initiator for the thermal curing of polymethylhydrosiloxane (PMHS) and polymethylvinylsiloxane (PMVS). The AIBN-initiated curing reaction between the Si-H groups of PMHS generated Si-O-Si and Si-Si cross-links. In contrast, PMVS was cured via the formation of C-C bonds through "methyl-vinyl"and "vinyl-vinyl"mechanisms. Curing reactions were performed at 80-120 °C in air and confirmed by 13C and 29Si solid state NMR analyses and swelling trials.

KW - SI-H BONDS

KW - HYDROSILYLATION

KW - REAGENTS

UR - http://www.scopus.com/inward/record.url?scp=85087785803&partnerID=8YFLogxK

U2 - 10.1039/d0dt01061h

DO - 10.1039/d0dt01061h

M3 - Article

C2 - 32589173

AN - SCOPUS:85087785803

VL - 49

SP - 8855

EP - 8858

JO - Dalton Transactions

JF - Dalton Transactions

SN - 1477-9226

IS - 26

ER -