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Alternating Copolymer of Double Four Ring Silicate and Dimethyl Silicone Monomer–PSS‐1
Author(s) -
Smet Sam,
Vandenbrande Steven,
Verlooy Pieter,
Kerkhofs Stef,
Breynaert Eric,
Kirschhock Christine E. A.,
MartineauCorcos Charlotte,
Taulelle Francis,
Van Speybroeck Veronique,
Martens Johan A.
Publication year - 2017
Publication title -
chemistry – a european journal
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.687
H-Index - 242
eISSN - 1521-3765
pISSN - 0947-6539
DOI - 10.1002/chem.201701237
Subject(s) - copolymer , silicate , monomer , silicone , ring (chemistry) , polymer chemistry , materials science , chemical engineering , chemistry , composite material , polymer , organic chemistry , engineering
A new copolymer consisting of double four ring (D4R) silicate units linked by dimethylsilicone monomer referred to as polyoligosiloxysilicone number one (PSS‐1) was synthesized. The D4R building unit is provided by hexamethyleneimine cyclosilicate hydrate crystals, which were dehydrated and reacted with dichlorodimethylsilane. The local structure of D4R silicate units and dimethyl silicone monomers was revealed by multidimensional solid‐state NMR, FTIR and modeling. On average, D4R silicate units have 6.8 silicone linkages. Evidence for preferential unidirectional growth and chain ordering within the PSS‐1 copolymer was provided by STEM and TEM. The structure of PSS‐1 copolymer consists of twisted columns of D4R silicate units with or without cross‐linking. Both models are consistent with the spectroscopic, microscopic and physical properties. PSS‐1 chains are predicted to be mechanically strong compared to silicones such as PDMS, yet more flexible than rigid silica materials such as zeolites.