Structure-Property Relationships in Thermoplastic Pseudo-Interpenetrating Polymer Networks. I. Phase Morphology

Sergeeva, L. M.; Grigoryeva, Olga; Zimich, O. N.; Привалко, Е. Г.; Shtompel, V. І.; Privalko, V. P.; Pissis, P.; Kyritsis, Apostolos

doi:10.1080/00218469708010537

Cited by 12 publications

(25 citation statements)

References 2 publications

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“…These results suggest weak affinity between CPU and S/AA, in agreement with DSC results. 16 They are confirmed by the results of SAXS in Figure 2: the microheterogeneity of CPU is preserved in the t-AIPNs and the angular position of SAXS maximum [i.e., the mean distance between centers of nearest crystallites ͗L͘, derived from eq. (4)], does not particularly change with compositions.…”

Section: X-ray Scatteringsupporting

confidence: 78%

“…It follows that both crystallizability of BAG in CPU and the mean size of BAG microcrystallites ͗D͘ are little affected by S/AA. 16 In fact, ͗D͘ in Table I, as well as the crystal lattice spacing ͗d͘, do not particularly change with composition, whereas the experimental and the theoretical (on the base of additivity) values of the degree of crystallinity ͗X͘ are rather close to each other (furher comments on that point will, however, follow). These results suggest weak affinity between CPU and S/AA, in agreement with DSC results.…”

Section: X-ray Scatteringmentioning

confidence: 85%

“…16 The diffraction maximum at 2⌰ ϭ 25 min on the SAXS curve of pure CPU (Fig. 2, curve 1) is attributed to microcrystallites of BAG.…”

Section: X-ray Scatteringmentioning

confidence: 98%

“…1, curve 1) is typical for an amorphous polymer with a broad amorphous halo around 2⌰ ϭ 19.2°, most proba- THERMOPLASTIC-APPARENT INTERPENETRATING POLYMER NETWORKS bly due to local spatial correlations between phenyl rings of styrene sequences. 16 The WAXS curve of pure CPU (Fig. 1, curve 7) is typical for a semicrystalline polymer with several sharp diffraction peaks superposed on a broad amorphous halo.…”

Section: X-ray Scatteringmentioning

confidence: 99%

“…In a previous publication the morphology of some of these compositions was studied by means of WAXS, SAXS, and differential scanning calorimetry, DSC. 16 …”

Section: Introductionmentioning

confidence: 97%

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Structure-property relationships in thermoplastic-apparent interpenetrating polymer networks based on crystallizable polyurethane and styrene-acrylic acid copolymer

Kyritsis

Pissis

Grigorieva

et al. 1999

J. Appl. Polym. Sci.

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Structure-property relationships in thermoplastic-apparent interpenetrating polymer networks (t-AIPNs), prepared by mechanical blending in a common solvent of crystallizable polyurethane (CPU) and styrene/acrylic acid random copolymer (S/AA), were investigated by means of wide-angle and small-angle X-ray scattering (WAXS and SAXS), dynamic mechanical analysis (DMA), thermally stimulated depolarization currents (TSDC) techniques, dielectric relaxation spectroscopy (DRS), and density, water uptake, deformation, and strength characteristics measurements. Several mechanical and dielectric relaxations of the pure components were characterized, and the effects thereupon induced by blending were followed. The two components show weak affinity to each other. The t-AIPNs can be classified into two groups with high and low contents of CPU, showing essentially the behavior of CPU and of S/AA, respectively. On the other hand, deviations from additivity in several properties indicate interactions between the two components, caused by the formation of H-bonds between their functional groups, and resulting in partial miscibility. In addition, significant changes are observed on some properties of the t-AIPNs on addition of small amounts of either of the components.

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Section: X-ray Scatteringsupporting

confidence: 78%

Section: X-ray Scatteringmentioning

confidence: 85%

“…16 The diffraction maximum at 2⌰ ϭ 25 min on the SAXS curve of pure CPU (Fig. 2, curve 1) is attributed to microcrystallites of BAG.…”

Section: X-ray Scatteringmentioning

confidence: 98%

Section: X-ray Scatteringmentioning

confidence: 99%

“…In a previous publication the morphology of some of these compositions was studied by means of WAXS, SAXS, and differential scanning calorimetry, DSC. 16 …”

Section: Introductionmentioning

confidence: 97%

See 3 more Smart Citations

Structure-property relationships in thermoplastic-apparent interpenetrating polymer networks based on crystallizable polyurethane and styrene-acrylic acid copolymer

Kyritsis

Pissis

Grigorieva

et al. 1999

J. Appl. Polym. Sci.

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Thermoplastic apparent interpenetrating polymer networks of polyurethane and styrene/acrylic acid block copolymer: Structure–property relationships

Kanapitsas

Lebedev

Slisenko

et al. 2006

J of Applied Polymer Sci

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Thermoplastic apparent interpenetrating polymer networks (t-AIPNs) of crystallizable polyurethane (CPU) and a styrene/acrylic acid block copolymer (S-b-AA, acid form) of several compositions were prepared by casting from a common solvent. A variety of experimental techniques, including size exclusion chromatography (SEC), differential scanning calorimetry (DSC), thermogravimetric analysis (TGA), dynamic mechanical analysis (DMA), broadband dielectric relaxation spectroscopy (DRS), thermally stimulated depolarization currents (TSDC), and density measurements were employed to investigate structureproperty relationships of the t-AIPNs. Special attention was paid to the investigation of molecular dynamics of the CPU component in the t-AIPNs, by combination of the dielectric DRS and TSDC techniques, as well as from the methodological point of view, to the prospects of morphological characterization by broadband DRS. The results show that the CPU/S-b-AA t-AIPNs studied can be considered as multiphase systems having at least two amorphous and one crystalline phases, as well as regions of mixed compositions. Their properties are determined by the heterogeneity of the individual components, as well as by the heterogeneity caused by the thermodynamic incompatibility of these components. The degree of incompatibility is determined, to a large extent, by the intermolecular hydrogen bonding between the functional groups of the CPU and the S-b-AA components (ester groups and COOH-groups, respectively), which is more effective on addition of small amounts of either of the components.

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Thermoplastic apparent interpenetrating polymer networks of polyurethane and styrene/acrylic acid copolymer obtained by melt mixing. Structure‐property relationships

Vatalis¹,

Delides²,

Grigoryeva

et al. 2000

Polymer Engineering & Sci

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Thermoplastic apparent interpenetrating polymer networks (thermoplastic‐AIPNs) were prepared at several compositions by melting and pressing of crystallizable polyurethane (CPU), based on butylene adipate glycol (BAG), and styrene/acrylic acid random copolymer (S/AA). Structure‐property relationships in the thermoplastic‐AIPNs were investigated by means of wide‐angle and small‐angle X‐ray scattering (WAXS, SAXS), differential scanning calorimetry (DSC), dynamic mechanical thermal analysis (DMTA), thermally stimulated depolarization currents (TSDC) techniques, dielectric relaxation spectroscopy (DRS) and several physico‐mechanical characterization techniques. The results obtained by the various techniques were critically compared to each other. They suggest that the two components show weak affinity to each other and that the thermoplastic‐AIPNs can be classified into two groups with high and low contents of CPU, showing essentially the behavior of CPU and S/AA, respectively. However, deviations from additivity and significant changes for several properties on addition of small amounts of either of the components suggest partial miscibility. Most of the results are explained by physical interactions of COOH‐groups of AA in S/AA with the ester groups of the flexible CPU blocks, which promote microphase separation in both the CPU and the S/AA components.

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Structure-Property Relationships in Thermoplastic Pseudo-Interpenetrating Polymer Networks. I. Phase Morphology

Cited by 12 publications

References 2 publications

Structure-property relationships in thermoplastic-apparent interpenetrating polymer networks based on crystallizable polyurethane and styrene-acrylic acid copolymer

Structure-property relationships in thermoplastic-apparent interpenetrating polymer networks based on crystallizable polyurethane and styrene-acrylic acid copolymer

Thermoplastic apparent interpenetrating polymer networks of polyurethane and styrene/acrylic acid block copolymer: Structure–property relationships

Thermoplastic apparent interpenetrating polymer networks of polyurethane and styrene/acrylic acid copolymer obtained by melt mixing. Structure‐property relationships

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