Estimation of conformational characteristics of bisphenol-A based poly(hydroxyethers)

Kaštánek, Alois; Podzimek, Štěpán; Dostál, Jiřı́; Šimek, Lubomı́r; Bohdanecký, M.

doi:10.1016/s0032-3861(99)00474-7

Cited by 8 publications

(10 citation statements)

References 14 publications

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“…This section attempts to characterize 35PDMPA by the theory of the worm-like touched-bead model [40,41] and compare the results with previous sections. According to this theory, the interpretation of the intrinsic viscosity of 35PDMPA in EA requires estimation of three characteristic parameters: cross-sectional chain diameter expressed as A η [Eq.…”

Section: Wormlike Touched-beadmentioning

confidence: 99%

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Characteristics of Poly(3,5-Dimethylphenylacrylate) in Ethyl Acetate at 25 and 30°C

Hamidi

Best

2014

Journal of Macromolecular Science, Part B

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The flow times of ethyl acetate (EA) and poly (3,5-dimethylphenylacrylate) (35PDMPA) in EA were measured using a Cannon-Ubbelohde semi-micro-dilution capillary viscometer in a thermostated water bath at 25 and 30 • C ± 0.02 • C. The intrinsic viscosities [η] of 35PDMPA/EA solutions were evaluated by classical Huggins, and Kraemer's methods. The values of Huggins' constant were related to the polymer-solvent interactions and the nature of the polymer solution. The intrinsic viscosity-molecular weight relationship was established with the two-parameter classical methods of Staudinger-Mark-Houwink-Sakurada and Stockmayer-Fixman. The conformational parameter C ∞ and the rigidity factor σ indicated 35PDMPA was semiflexible. Also, the values of [η] andM w of 35PDMPA samples in EA fit well into the Yamakawa-Fujii worm-like touched-bead model of stiff chains theory modified by Bohdanecký. Comparing the molecular parameters of 35PDMPA in EA with that of 35PDMPA in toluene at the same temperature showed that this polymer was more flexible in EA.

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Section: Wormlike Touched-beadmentioning

confidence: 99%

“…(24). [41] Bead diameters of 6.7 and 11.2 Å were calculated for 35PDMPA in EA at 25 and 30 • C, respectively. Thus, the cross-sectional diameter of 35PDMPA in EA at 25 • C was smaller than at 30 • C, as it should be.…”

Section: Wormlike Touched-beadmentioning

confidence: 99%

Characteristics of Poly(3,5-Dimethylphenylacrylate) in Ethyl Acetate at 25 and 30°C

Hamidi

Best

2014

Journal of Macromolecular Science, Part B

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“…Another method of evaluation of the characteristic parameters of 35PDMPA is by the theory for the worm-like touched-bead model [23,24]. Based on this theory, the intrinsic viscosity at theta condition depends not only on the unperturbed mean-square end-to-end distance  …”

Section: Wormlike Cylindermentioning

confidence: 99%

“…Table 4 shows the characteristic parameters of 35PDMPA. Also, for the sake of comparison, characteristics parameter of a very flexible chain such as bisphenol-A based poly(hydroxyethers) (PHE) from reference [25] and an stiff polymer, Poly(disopropylfumarate), (PDiPF) from reference [24] are sited. The high values of l K and M K of 35PDMPA suggests a semi flexible macromolecule.…”

Section: 663mentioning

confidence: 99%

Effects of Side-Chain on Conformational Characteristics of Poly(3,5-Dimethyl-Phenyl Acrylate) in Toluene at 40℃

Hamidi¹,

Ihekweazu²,

Wiredu³

et al. 2012

ACES

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The intrinsic viscosity [η] of poly(3,5-dimethyl-phenyl-acrylate) (35PDMPA) solutions were evaluated throughout the measurements of the flow times of toluene and polymer solutions by classical Huggins, and Kraemer's methods using a Cannon-Ubbelohde semi-micro-dilution capillary viscometer in a Cannon thermostated water bath at 40˚C ± 0.02˚C. The values of Huggins' constant estimated ranged from 0.2 to 0.4 which were within expectations. The intrinsic viscosities and molecular weight relationship was established with the two-parameter classical models of Staudinger-Mark-HouwinkSakurada and Stockmayer-Fixman. Conformational parameter C ∞ and σ indicated 35PDMPA be semi flexible. Also, the rigidity of 35PDMPA was confirmed by Yamakawa-Fuji wormlike theory modified by Bohdanecký. The molecular parameters were estimated and compared. The results showed that 35PDMPA behaves like a semi-rigid polymer in toluene at 40˚C rather than a random coil flexible macromolecule.

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“…To obtain polymers with considerably lower T m , several chemical modifications including: (i) the introduction of bulky, or non-symmetrical substituents [39][40]; (ii) the use of flexible spacer; (iii) the use of non-linear or bent monomers [41][42][43]; and (iv) copolymerisation of different monomers [18][19][20][21][22][44][45][46][47][48][49] have been previously used. Here, the route of copolymerisation provides versatile ways to prepare new thermotropic copolyesters of low T m through the use of conventional monomeric diacids and diols.…”

Section: Introductionmentioning

confidence: 99%

Prediction of liquid crystalline properties of poly(1,4-phenylene sebacate-oxybenzoate) by Monte Carlo simulation

Pavel

Yarovsky

Shanks

2005

Polymer

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Estimation of conformational characteristics of bisphenol-A based poly(hydroxyethers)

Cited by 8 publications

References 14 publications

Characteristics of Poly(3,5-Dimethylphenylacrylate) in Ethyl Acetate at 25 and 30°C

Characteristics of Poly(3,5-Dimethylphenylacrylate) in Ethyl Acetate at 25 and 30°C

Effects of Side-Chain on Conformational Characteristics of Poly(3,5-Dimethyl-Phenyl Acrylate) in Toluene at 40℃

Prediction of liquid crystalline properties of poly(1,4-phenylene sebacate-oxybenzoate) by Monte Carlo simulation

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