1990
DOI: 10.1021/ma00205a032
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Effect of molecular weight, branching, and free volume on diffusion in epoxies during curing

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Cited by 23 publications
(12 citation statements)
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“…Diffusion imposes a restriction on the upper limit of conversions being involved in calculations by (4) and (5). Generally, this limit depends on the thermal history of cure and may be experimentally encountered as early as by α = 0.4 7 or 0.3 . The latter value has been conventionally taken as the upper limit in our theoretical analysis of the kinetically controlled cure.…”
Section: Resultsmentioning
confidence: 99%
See 1 more Smart Citation
“…Diffusion imposes a restriction on the upper limit of conversions being involved in calculations by (4) and (5). Generally, this limit depends on the thermal history of cure and may be experimentally encountered as early as by α = 0.4 7 or 0.3 . The latter value has been conventionally taken as the upper limit in our theoretical analysis of the kinetically controlled cure.…”
Section: Resultsmentioning
confidence: 99%
“…Differential scanning calorimetry (DSC) which measures the heat flow from the reacting system is a very convenient tool to study the overall epoxy−amine cure. It is especially useful when a detailed mechanism has been established by other methods such as FTIR, ,,, HPLC, , ,, and NMR. ,,, In such a case, the kinetic analysis of DSC data helps to determine those steps which most profoundly contribute to the overall process. This allows for the reduction of intricate mechanisms to an effective kinetic scheme.…”
Section: Introductionmentioning
confidence: 99%
“…Branching may influence thermodynamic interactions between the polymer and solvent,1–3 rheological properties,4, 5 Θ temperature,2, 6 glass‐transition temperature,7 melting behavior and crystallization,8 phase separation of polymer mixtures,9, 10 curing behavior of synthetic resins,11 mechanical properties, solubility, chemical resistance, and solution viscosity. In some cases the branching can have counteracting impact; for example, the change of glass‐transition temperature with increasing degree of branching is the result of two effects: the increased number of end groups increases the chain mobility and free volume, whereas the introduction of branch points reduces the chain mobility and free volume.…”
Section: Introductionmentioning
confidence: 99%
“…1 The curing reactions have been investilenes with epichlorohydrin. It was found that the gated by various techniques, such as differential thioderivatives can be cured by means of common scanning calorimetry (DSC), [2][3][4][5][6][7][8][9][10][11][12][13][14][15][16][17][18][19] Fourier transcuratives used for epoxy resins, yielding products form infrared (FTIR) spectroscopy, [20][21][22][23][24] high-perwith often better properties in comparison to formance liquid chromatography (HPLC), 25,26 and those of the cured resins from Bisphenol A. The nuclear magnetic resonance (NMR) 12,13,15,20 and cure process itself has not, however, been a subthe main mechanism is believed to be known.…”
Section: Introductionmentioning
confidence: 99%