Transfer Constants for Vinyl Ethers at

The vinyl ether transfer agents, like other vinyl ethers, can show marked acid sensitivity. They are not suited for use with acid monomers. Even traces of acidic impurities in the monomer or the polymerization medium can catalyze decomposition of the transfer agent. 

2 Ailyl sulfides, sulfonates, halides, phosphonates, silanes 

Some typical transfer constants for allyl sulfides are given in Table 6.7. The values of Clt for these reagents are less dependent on the particular monomer than those for halocarbons (Table 6.2) or thiol transfer agents (Table 6.4). The low transfer constant of 32 demonstrates the importance of the activating group Z (cf. 11). 

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