Rate autoacceleration and gelation behavior in radical copolymerization of methacrylate and dimethacrylate was written by Zhu, Mengbing;Xu, Sijia;Zhang, Hongwen;Ding, Yonghong;Yu, Qiang. And the article was included in Huagong Xuebao (Chinese Edition) in 2009.Computed Properties of C14H12S2 This article mentions the following:
Atom transfer radical polymerization (ATRP), reversible addition-fragmentation chain transfer (RAFT) and conventional free radical polymerization (FRP) of polyethylene glycol Me ether methacrylate (PEGMEMA) and polyethylene glycol dimethacrylates (PEGDMA) were conducted resp., and their reaction kinetics and gelation behavior were investigated with respect to the polymerization rate, vinyl conversion, gel point, and evolution of network. All the three systems experienced autoacceleration of the reaction. The rate autoacceleration in the ATRP was caused by diffusion-controlled radical deactivation, while that in the RAFT was attributed to diffusion-controlled addition of propagating radicals to RAFT-capped chains. In the ATRP and RAFT systems, the slow growth of primary chains allowed adequate chain relaxation and diffusion of reacting species, which reduced the probability of intramol. cyclizations and limited the formation of microgels, leading to earlier gelation, as compared with the FRP system. The crosslinking networks in the ATRP and RAFT developed mainly through gel radical propagation with monomers, along with incorporation of branched polymers, resulting in a gradual increase in gel fraction and network d. In the experiment, the researchers used many compounds, for example, Benzyl benzodithioate (cas: 27249-90-7Computed Properties of C14H12S2).
Benzyl benzodithioate (cas: 27249-90-7) belongs to esters. Esters typically have a pleasant smell; those of low molecular weight are commonly used as fragrances and are found in essential oils and pheromones. Cyclic esters are called lactones, regardless of whether they are derived from an organic or inorganic acid. One example of an organic lactone is γ-valerolactone.Computed Properties of C14H12S2
Referemce:
Ester – Wikipedia,
Ester – an overview | ScienceDirect Topics