TY - JOUR

T1 - Similar nature leads to improved properties

T2 - Cyclic organosilicon triperoxides as promising curing agents for liquid polysiloxanes

AU - Дерябин, Константин Валерьевич

AU - Яременко, И.А.

AU - Числов, Михаил Владимирович

AU - Fleury, F.

AU - Терентьев, А.О.

AU - Исламова, Регина Маратовна

N1 - Funding Information: Preparation of polymer compositions and assessment of their properties were supported by the Russian Ministry of Education and Science (State Contract 14.W03.31.0014, Megagrant). Synthesis of peroxides was supported by RFBR according to the research project no. 18-53-15010 and Projets de Recherche Conjoints (PRC) – CNRS, PRC Russie 2017 CNRS. Measurements were performed at the Center for Magnetic Resonance, the Center for Chemical Analysis and Materials Research, the Center of Thermal Analysis, Calorimetry and the Chemistry Educational Centre and the Centre for Culture Collection of Microorganisms (all in Saint Petersburg State University).

PY - 2018/9/21

Y1 - 2018/9/21

N2 - Cyclic organosilicon triperoxides were found to be vinyl-selective free-radical initiators for thermal curing at 100-180 °C of vinyl-terminated polydimethylsiloxane and trimethylsilyl-terminated polymethylhydrosiloxane producing homogeneous transparent silicone rubbers with antibacterial properties. The usage of the cyclic organosilicon triperoxides as the curing agents does not require free radical inhibitors in comparison with diacyl- and dialkyl peroxides. Among the tested compounds, the peroxide with the Me-Si-Me fragment and two cyclohexane rings is a much more active curing agent (180 °C, c = 0.22 M, τ curing = 45 min) than other organosilicon peroxides. Cured silicone samples from mixtures with vinyl-terminated polysiloxane and silicone hydride have improved mechanical properties: peroxides provide more than 200% elongation, and compression sets of the samples are less than 1%. The prepared silicone rubbers showed pronounced antibacterial activity.

AB - Cyclic organosilicon triperoxides were found to be vinyl-selective free-radical initiators for thermal curing at 100-180 °C of vinyl-terminated polydimethylsiloxane and trimethylsilyl-terminated polymethylhydrosiloxane producing homogeneous transparent silicone rubbers with antibacterial properties. The usage of the cyclic organosilicon triperoxides as the curing agents does not require free radical inhibitors in comparison with diacyl- and dialkyl peroxides. Among the tested compounds, the peroxide with the Me-Si-Me fragment and two cyclohexane rings is a much more active curing agent (180 °C, c = 0.22 M, τ curing = 45 min) than other organosilicon peroxides. Cured silicone samples from mixtures with vinyl-terminated polysiloxane and silicone hydride have improved mechanical properties: peroxides provide more than 200% elongation, and compression sets of the samples are less than 1%. The prepared silicone rubbers showed pronounced antibacterial activity.

KW - 1,2-DIOXOLANES

KW - COMPLEXES

KW - COPOLYMERS

KW - CROSS-LINKING

KW - CURED SILICONE-RUBBER

KW - HYDROSILYLATION

KW - MECHANICAL-PROPERTIES

KW - PERFORMANCE

KW - PEROXIDES

UR - http://www.scopus.com/inward/record.url?scp=85053723874&partnerID=8YFLogxK

UR - http://www.mendeley.com/research/similar-nature-leads-improved-properties-cyclic-organosilicon-triperoxides-promising-curing-agents-l

U2 - 10.1039/c8nj02499e

DO - 10.1039/c8nj02499e

M3 - Article

VL - 42

SP - 15006

EP - 15013

JO - New Journal of Chemistry

JF - New Journal of Chemistry

SN - 1144-0546

IS - 18

ER -