According to the previous discussion regarding the initiation of vinyl group
polyaddition by addition of DCPO, it is important to notice that above a certain value of DCPO concentration, the initiator will simply degrade without interacting with PSZ20, forming radicals that will not combine with vinyl groups
At the end of every branch, there is a vinyl group
. This star-like structure significantly influences the properties of the new polymers.
As illustrated in Figure 8, the methylene hydrogen atoms between the vinyl group
and the phenyl group should be very labile to abstraction by singlet oxygen since the radical can be resonance stabilized by both the adjacent double bond and the phenyl ring.
2) showed major peaks at 2931.41 cm-1 (Acetyl groups), 2866.83 cm-1 (symmetric CH3), 1770.20 cm-1 (vinyl group
), and 1055.17 cm-1 (RO strong) .
In this study, vinyl IL monomer was synthesized with a vinyl group
named 1-butyl-3-(4-vinylbenzyl)imidazolium chloride ([BVBI][Cl]) in order to prepare AEMs.
The vinyl group
of the O-MMT can be inserted in functional vinyl polymers by radiation-induced copolymerization of the functional vinyl monomers such as sodium styrene sulfonate (NaSS).
The internal crosslinking agent is a silane compound with one vinyl group
or allyl group attached to a silicon atom and at least one Si-O bond.
In the IR spectra, the absence of a sharp band at 948 [cm.sup.-1] and chemical shift [delta] at 7.16 ppm due to CH = CH in a monomer having vinyl group
, such as monomer NPAM indicates the formation of polymer via vinyl group
The name "addition cure" derives from the crosslinking reaction that consists of a multi-functional silicon hydride crosslinker that, in the presence of a precious metal catalyst such as platinum, adds across the double bond of the vinyl group
on the siloxane polymer chain.
The vinyl group
participates in the peroxide cure of the resin or elastomer system.
The collaborative work exploited near infrared (NIR) spectroscopy, which uses clinically relevant sized specimens, to provide information on both vinyl group
conversion and water uptake on the same composite specimen.