Quantitative Analysis of Semicrystalline Blends SAXS Data: Theoretical Modeling versus Linear Correlation Function

Fatnassi, Mohamed; Larbi, Fadhel Ben Cheikh; Halary, Jean Louis

doi:10.1155/2010/829752

Cited by 11 publications

(15 citation statements)

References 19 publications

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“…The main peak at q = 0.06 Å −1 is due to the lamellar spacing ( L p ) in the particles, calculated to be 109 Å. Correlation function analysis was also used to characterize the lamellar arrangements that result in the main peak at q = 0.06 Å −1 using a development of the Hosemann (Hosemann & Bagchi, 1962) theoretical model outlined by Fatnassi et al (Fatnassi, Ben Cheikh Larbi & Halary, 2010) (Supplementary Information, Equation S3) and achieved close fits to the SAXS data (Supplementary Information, Figure S3). This model was used to confirm the lamellar spacing ( L p = 109 Å), and calculate the crystalline layer thickness ( l c = 85 Å) and the amorphous layer thickness ( l a = 24 Å), from which a calculated crystallinity of 78% was derived.…”

Section: Resultsmentioning

confidence: 99%

“…Analysis of the subsequent scattering profiles were conducted using the Mathematica Software Package (Version 10) (Wolfram Research, 2014) and the Small-Angle Diffraction tool that is part of the Irena macro for Igor Pro (Ilavsky & Jemian, 2009). Correlation function analysis was performed using the “FindFit” command of the Mathematica Software Package, following a development of the Hosemann model (Hosemann & Bagchi, 1962) published by Fatnassi (Fatnassi, Ben Cheikh Larbi & Halary, 2010). …”

Section: Methodsmentioning

confidence: 99%

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Physical characterization and in silico modeling of inulin polymer conformation during vaccine adjuvant particle formation

Barclay

Rajapaksha

Thilagam

et al. 2016

Carbohydrate Polymers

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This study combined physical data from synchrotron SAXS, FTIR and microscopy with in-silico molecular structure predictions and mathematical modeling to examine inulin adjuvant particle formation and structure. The results show that inulin polymer chains adopt swollen random coil in solution. As precipitation occurs from solution, interactions between the glucose end group of one chain and a fructose group of an adjacent chain help drive organized assembly, initially forming inulin ribbons with helical organization of the chains orthogonal to the long-axis of the ribbon. Subsequent aggregation of the ribbons results in the layered semicrystalline particles previously shown to act as potent vaccine adjuvants. γ-inulin adjuvant particles consist of crystalline layers 8.5 nm thick comprising helically organized inulin chains orthogonal to the plane of the layer. These crystalline layers alternate with amorphous layers 2.4 nm thick, to give overall particle crystallinity of 78%.

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Section: Resultsmentioning

confidence: 99%

Section: Methodsmentioning

confidence: 99%

Physical characterization and in silico modeling of inulin polymer conformation during vaccine adjuvant particle formation

Barclay

Rajapaksha

Thilagam

et al. 2016

Carbohydrate Polymers

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“…The lamellar structure parameters can be determined from the γ( r ) function . The average crystalline thickness, L c can be obtained by the intersection of straight line

d γ (r) / d r

with the baseline at

γ_{\min} = - A

.…”

Section: Methodsmentioning

confidence: 99%

“…The average crystalline thickness, L c can be obtained by the intersection of straight line

d γ (r) / d r

with the baseline at

γ_{\min} = - A

. This baseline is defined as the horizontal tangent at the first γ( r ) minimum, which belongs to the self‐correlation triangle …”

Section: Methodsmentioning

confidence: 99%

Structure and properties relationship of melt reacted polyamide 6/malenized soybean oil

Ernzen

Bondan

Luvison

et al. 2015

J of Applied Polymer Sci

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In this work, a maleinized soybean oil (SOMA) was melt reacted with polyamide 6 and the thermal, rheological, and morphological properties were evaluated. It was observed that the maleinized soybean oil reacted with polyamide chains, increasing the molecular weight of the polymer. Addition of SOMA also promoted an increase in the amount of α crystalline phase as well as in the crystallinity index. The average amorphous layer thickness (La) was enhanced with the addition of 1 wt % of SOMA, while the average crystalline layer thickness (Lc) were significantly enlarged with the increase in SOMA content, indicating that SOMA structures were located at the interfacial region between amorphous and crystalline. The addition of 5 wt % of SOMA plasticized the PA6, reducing its glass transition temperature. However, the sample containing 5 wt % of SOMA showed an accentuated pseudoplastic behavior as compared to other samples. Addition of SOMA also reduced the tensile strength and increased the elongation at break. © 2015 Wiley Periodicals, Inc. J. Appl. Polym. Sci. 2016, 133, 43050.

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“…studied the microphase separation and crystallization in blends of polystyrene–PMMA diblock copolymer and PVDF. The morphology of PMMA phase in PVDF/PMMA blends has been investigated in previous research . Okabe et al .…”

Section: Introductionmentioning

confidence: 99%

Nanophase morphology and crystallization in poly(vinylidene fluoride)/polydimethylsiloxane‐block‐poly(methyl methacrylate) blends

Seraji

Gui

Zhang

et al. 2018

Polymer International

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A polydimethylsiloxane‐block‐poly(methyl methacrylate) (PDMS‐b‐PMMA) diblock copolymer was synthesized by the atom transfer radical polymerization method and blended with a high‐molecular‐weight poly(vinylidene fluoride) (PVDF). In this A‐b‐B/C type of diblock copolymer/homopolymer system, semi‐crystallizable PVDF (C) and PMMA (B) block are miscible due to favorable intermolecular interactions. However, the A block (PDMS) is immiscible with PVDF and therefore generates nanostructured morphology via self‐assembly. Crystallization study reveals that both α and γ crystalline phases of PVDF are present in the blends with up to 30 wt% of PDMS‐b‐PMMA block copolymer. Adding 10 wt% of PVDF to PDMS‐b‐PMMA diblock copolymer leads to worm‐like micelle morphology of PDMS of 10 nm in diameter and tens of nanometers in length. Moreover, morphological results show that PDMS nanostructures are localized in the inter‐fibrillar region of PVDF with the addition of up to 20 wt% of the block copolymer. Increase of PVDF long period by 45% and decrease of degree of crystallization by 34% confirm the localization of PDMS in the PVDF inter‐fibrillar region. © 2018 Society of Chemical Industry

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Quantitative Analysis of Semicrystalline Blends SAXS Data: Theoretical Modeling versus Linear Correlation Function

Cited by 11 publications

References 19 publications

Physical characterization and in silico modeling of inulin polymer conformation during vaccine adjuvant particle formation

Physical characterization and in silico modeling of inulin polymer conformation during vaccine adjuvant particle formation

Structure and properties relationship of melt reacted polyamide 6/malenized soybean oil

Nanophase morphology and crystallization in poly(vinylidene fluoride)/polydimethylsiloxane‐block‐poly(methyl methacrylate) blends

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