Rheological characterization of cross-linked poly(methyl methacrylate)

Ogura, Koji; Wagner, Manfred H.

doi:10.1007/s00397-013-0714-6

Cited by 10 publications

(4 citation statements)

References 30 publications

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“…As shown in Fig. 2(a), the PINE exhibits a solid-like behaviour with G ′(elastic modulus) > G ′(viscous modulus); G ′ is almost constant, indicating that there is a cross-linked network in the PINE, 36–40 which is consistent with the results of optical microscopy. The PINE has a high shear viscosity, although it exhibits frequency-dependent behaviour, as shown in Fig.…”

Section: Resultssupporting

confidence: 84%

“…35 The optical microscope images of the PINE exhibit a cross-linked network microstructure, i.e., the solid-state 'poly(Na + -(H The viscoelastic properties of the PINE were further evaluated using mechanical spectra at 26 C. As shown in Fig. 2(a), This journal is © The Royal Society of Chemistry 2022 the PINE exhibits a solid-like behaviour with G ′ (elastic modulus) > G ′ (viscous modulus); G ′ is almost constant, indicating that there is a cross-linked network in the PINE, [36][37][38][39][40] which is consistent with the results of optical microscopy. The PINE has a high shear viscosity, although it exhibits frequencydependent behaviour, as shown in Fig.…”

Section: Pine With a Wide Esw And High Ionic Conductivitymentioning

confidence: 99%

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A ‘poly(ions–water ligand) network’ electrolyte enables high-voltage high-conductivity aqueous metal-ion chemistries

et al. 2022

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Section: Resultssupporting

confidence: 84%

Section: Pine With a Wide Esw And High Ionic Conductivitymentioning

confidence: 99%

A ‘poly(ions–water ligand) network’ electrolyte enables high-voltage high-conductivity aqueous metal-ion chemistries

et al. 2022

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“…The validity of the model was demonstrated for linear polyolefins [30], branched polyolefins [48,50], branched polystyrene [51], polydisperse polyisobutene [41], branched poly(methyl methacrylate) [52,53] and also partially gelled LDPE [54].…”

Section: Molecular Stress Function Modelmentioning

confidence: 99%

Analysis of high melt‐strength poly(ethylene terephthalate) produced by reactive processing by shear and elongational rheology

Kruse

Wang

Shah

et al. 2018

Polymer Engineering & Sci

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Three grades of poly(ethylene terephthalate) (PET) produced by different synthesis routes and with different molar masses were reactively extruded with two tetra‐functional chain extenders, i.e., pyromellitic dianhydride (PMDA) and tetraglycidyl diamino diphenyl methane (TGDDM). The preferred reactivity of the coupling agents led to different long‐chain branched (LCB) structures, which can be related to different hydroxyl and carboxyl end group concentrations of the PET grades investigated. The complex viscosity and the transient elongational viscosity increased by up to two decades. Both the activation energy of flow and the loss angle indicate long‐chain branching. A more quantitative assessment of the extent of strain hardening was achieved by application of the molecular stress function (MSF) model. The two material parameters of the model revealed different behaviors depending on the chain extender used. The initial molar mass of PET and the concentration of end groups, i.e., hydroxyl and carboxyl, determine the structure of the polymer molecules. PMDA proved to be an excellent coupling agent for industrial processing which induces reproducibly either a star‐like, comb‐like, or randomly branched structure depending on the concentration of coupling agent added and the hydroxyl concentration of the PET employed. TGDDM led to a hyperbranched structure. POLYM. ENG. SCI., 59:396–410, 2019. © 2018 Society of Plastics Engineers

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“…In the case of cross-linkable PMMA systems (Ogura and Wagner 2013), strain hardening is strongly increased with increasing concentration of a cross-linking agent, and at the same concentration, the strain-hardening tendency of the sample produced by a dilution recipe, i.e., by addition of thermoplastic (non-cross-linkable) PMMA is higher than that produced by a non-diluted recipe.…”

Section: Introductionmentioning

confidence: 94%

Uniaxial extensional flow behavior of comb-shaped poly(methyl methacrylate)

et al. 2015

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Comb-shaped poly(methyl methacrylate)s (PMMAs) with various mass fractions and various molecular weights of the side chains were prepared by free-radical polymerization followed by atom transfer radical polymerization (ATRP). The rheological properties were characterized in linear-viscoelasticity and in uniaxial extensional flow. Due to branching and thereby slow relaxation of the backbone, significant strain hardening was observed and well analyzed by the molecular stress function (MSF) model. The model parameter f max 2 increased with increasing M n,bb at almost constant M n,br and p, and with increasing p at almost constant Φ n,br , where M n,bb and M n,br are the number-average molecular weights of the backbone and the branched chains, and p and Φ n,br are the average number per backbone and the number-average mass fraction of the branched chains, respectively. These results provide guidelines for the polymer design with the aim of enhancing strain hardening in elongational flow.

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Rheological characterization of cross-linked poly(methyl methacrylate)

Cited by 10 publications

References 30 publications

A ‘poly(ions–water ligand) network’ electrolyte enables high-voltage high-conductivity aqueous metal-ion chemistries

A ‘poly(ions–water ligand) network’ electrolyte enables high-voltage high-conductivity aqueous metal-ion chemistries

Analysis of high melt‐strength poly(ethylene terephthalate) produced by reactive processing by shear and elongational rheology

Uniaxial extensional flow behavior of comb-shaped poly(methyl methacrylate)

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