2012
DOI: 10.1007/s00396-012-2590-5
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Emulsion polymerization of styrene using irreversible addition–fragmentation chain transfer agents: effect on the course of the polymerization and molecular weight

Abstract: The emulsion polymerization of styrene with three different chain transfer agents (CTAs) based on irreversible addition-fragmentation chain transfer (AFCT) mechanism was first reported in this work. The influences of these irreversible AFCT agents on the rate of polymerization, particle size, and molecular weight were investigated. It was found that the intrinsic activity and desorption behaviors of the CTAs determined the efficiency for molecular weight control, rate of polymerization, and particle size in th… Show more

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Cited by 6 publications
(10 citation statements)
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“…Thus, a good balance between water solubility and monomer solubility of the CTA is required [20]. In our previous study [21], a similar conclusion was obtained in which ethyl α-p-toluenesulfonyl-methacrylate with a higher C tr significantly reduced the R p .…”
Section: Introductionsupporting
confidence: 57%
“…Thus, a good balance between water solubility and monomer solubility of the CTA is required [20]. In our previous study [21], a similar conclusion was obtained in which ethyl α-p-toluenesulfonyl-methacrylate with a higher C tr significantly reduced the R p .…”
Section: Introductionsupporting
confidence: 57%
“…21 Alternative to thiol-ene chemistry, AFCT reagents 22,23 can also be used to modify the process of radical chain growth. However, AFCT reagents have been the focus of research mostly studying molecular weight regulation of linear polymers 24 or end-group functionalization. 25 Some studies were also done using AFCT chemistry for the acceleration of cationic photopolymerization.…”
Section: Introductionmentioning
confidence: 99%
“…The AFCT mechanism shows great potential in pushing an uncontrolled radical chain growth polymerization reaction toward a step growth-like manner (Figure ). , By adding AFCT reagents to a radical polymerizable cross-linking monomer mixture, the uncontrolled radical chain growth mechanism can be altered and would ultimately produce materials with a more homogeneous network structure and, consequently, improved mechanical properties. β-Allyl sulfones are promising AFCT reagents, and basic polymerization studies on such substances have already been performed. , However, hardly any AFCT reagents aside from β-allyl sulfides have been mentioned for the synthesis of photopolymerized cross-linked functional materials. Research on AFCT reagents thus far was mainly focused on molecular weight control of linear polymers (e.g., styrene and methyl methacrylate), for the synthesis of hyperbranched polymers or end-group functionalization. ,, In general, highly cross-linked polymers with AFCT reagents potentially pave the way for applications such as shape memory polymers , and covalent adaptable networks …”
Section: Introductionmentioning
confidence: 99%