RAFT Optimization
What is an example of a more activated monomer (MAM)?
Styrene, methyl methacrylate, methyl acrylate, acetonitrile
What type of mechanism is RAFT?
Radical
What does the R group do in the RAFT agent?
Becomes the leaving group and new chain initiator
What type of grafting technique incorporates the advantages of grafting-to and -from?
CAP
Who founded RAFT polymerization?
Ezio Rizzardo
What is an example of a less activated monomer (LAM)?
Vinyl acetate, vinyl chloride, NVP, NVC
Which is faster in the mechanism, transfer or propagation?
Transfer
What does the Z group of the RAFT agent do?
Stabilizes radical and activates C=S bond
What initiator did the group use?
Lithium phenyl-2,4,6-trimethylbenzoylphosphinate (LAP)
What is an important application of RAFT polymerization?
Drug delivery, bio materials
What principle makes a MAM versus a LAM?
Electron donation or withdrawal, or unsaturated carbons vs heteroatoms
What are typical initiators of RAFT?
AIBN, Photo initiators, thermal initiators
What term is used as stabilization of xanthates and dithiocarbamates?
Resonance
What were the two polypeptides used in the article?
PLLMA and PLGMA
What is the relationship between dispersity and conversion in RAFT polymerization?
Inverse (Dispersity decreases as conversion increases)
How can you make a switchable RAFT agent?
Make the Z-group pH dependent
What are the typical end groups of RAFT polymerization?
The R group and dithio compound of the RAFT agent
What type of R group is best for MAMs?
Tertiary with stabilizing groups
What polypeptide provided longer single layer film thickness?
PLGMA
What was the first attempt at reversible chain transfer?
Iodine-mediated per fluorinated polymerization
What is an example of a universal RAFT agent?
Fluorine or imidazole as the Z group
What is an example of a possible end group modification?
Hetero Diels Alder, Thermolysis, Nucleophile, Radical Induced Reactions
What is one of the most used Z groups?
Phenyl ring or thio-alkyl group
What novel property does CAP-RAFT offer for the films?
Single-step macro-crosslinking
What does RAFT stand for?
Reversible Addition-Fragmentation Chain Transfer Polymerization