Single molecule diffusion and its heterogeneity during the bulk radical polymerization of styrene and methyl methacrylate

Stempfle, Beate; Dill, Maren; Winterhalder, Martin; Müllen, Kläus; Wöll, Dominik

doi:10.1039/c2py20268a

Cited by 31 publications

(39 citation statements)

References 42 publications

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“…13%. 22 Interestingly, within the same monomer conversion range the deviation of the similarly sized PDI-PMMA13k from the initial scaling appears. At this point, macroscopic (bulk-)viscosity looses its validity to describe molecular motion, and nano-viscosity starts to rule.…”

Section: Discussionmentioning

confidence: 90%

“…We observed significant heterogeneity in single molecule motion during the autoacceleration period of the polymerization of methyl methacrylate, which is known to exhibit a strong Trommsdorff effect. 22 Such a heterogeneous behaviour can also be found in microviscosity measurements using molecular rotors. 23 In contrast, single molecule mobility during the styrene polymerization with only weak Trommsdorff effect was essentially homogeneous.…”

Section: Introductionmentioning

confidence: 80%

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Diffusion of single molecular and macromolecular probes during the free radical bulk polymerization of MMA – towards a better understanding of the Trommsdorff effect on a molecular level

et al. 2016

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Section: Discussionmentioning

confidence: 90%

Section: Introductionmentioning

confidence: 80%

Diffusion of single molecular and macromolecular probes during the free radical bulk polymerization of MMA – towards a better understanding of the Trommsdorff effect on a molecular level

et al. 2016

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“…Furthermore, at the molecular level, the roles of chain diffusion in the termination step were recently discussed . The contribution of translational diffusion of ‘short chains’ and ‘long chains’ in the termination step is explained and also discussed in detail in the recent textbook by Young and Lovell and in studies on the diffusion of single probe molecules during the polymerization of styrene and MMA by fluorescence correlation spectroscopy and wide‐field fluorescence microscopy …”

Section: Features Of Polymerization Kinetics In the Bulk Statementioning

confidence: 99%

Phase separation of polymer mixtures driven by photochemical reactions: current status and perspectives

Tran‐Cong‐Miyata

Nakanishi

2016

Polymer International

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Phase separation of polymer mixtures induced by photo-crosslinking and photopolymerization is summarized from the viewpoint of competing interactions in polymeric systems. First, the kinetics of photo-crosslinking and photopolymerization are reviewed with particular emphasis on the Trommsdorff − Norrish effect in polymerization, which leads to the formation of a bimodal distribution of molecular weight at long irradiation time. The emergence of a very large molecular weight and the characteristic time for this effect to set in are utilized as a tool to control the temporal development of the resulting morphology. The shrinkage associated with the reaction and particularly its effect on the phase separation and the morphology are discussed together with the influence of the Trommsdorff − Norrish effect. Experiments on polymerization-induced phase separation extended from binary to ternary mixtures are described where the interfacial interactions give rise to a wide variety of morphologies. Taking advantages of light, experiments using spatial and temporal modulation have been performed to control and manipulate the phase separation. These experimental results are summarized and briefly discussed in relation to the elastic deformation induced by polymerization. Finally, an overview of theoretical studies and numerical simulation of reaction-induced phase separation is given with some comments on the complexity of the phenomena.

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“…different diffusion coefficients. They were also observed in the gel effect region during the linear polymerization of methyl methacrylate, 142 where this heterogeneity appears already at a rather low conversion of 20% and thus might attribute signicantly to the strong Trommsdorff effect observed in this system.…”

Section: Fcs To Follow Polymerization Processesmentioning

confidence: 82%

Fluorescence correlation spectroscopy in polymer science

Wöll

2014

RSC Adv.

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Single molecule diffusion and its heterogeneity during the bulk radical polymerization of styrene and methyl methacrylate

Cited by 31 publications

References 42 publications

Diffusion of single molecular and macromolecular probes during the free radical bulk polymerization of MMA – towards a better understanding of the Trommsdorff effect on a molecular level

Diffusion of single molecular and macromolecular probes during the free radical bulk polymerization of MMA – towards a better understanding of the Trommsdorff effect on a molecular level

Phase separation of polymer mixtures driven by photochemical reactions: current status and perspectives

Fluorescence correlation spectroscopy in polymer science

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