Miscibility and spherulite growth kinetics in the poly(ethylene oxide)/poly(benzyl methacrylate) system

Mandal, Tarun K.; Kuo, Jimmy; Woo, Eamor M.

doi:10.1002/(sici)1099-0488(20000215)38:4<562::aid-polb8>3.0.co;2-8

Cited by 19 publications

(19 citation statements)

References 32 publications

(19 reference statements)

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“…This result might be attributed to the amorphous PVPh in the blends disrupting the lamellae in PTT during the process of crystallization. This phenomenon has also been observed in other semi‐crystalline/amorphous blends, such as PVPh/PHB,7 PEO/PMMA19 and PEO/PbzMA 20…”

Section: Resultssupporting

confidence: 69%

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Miscible blends of poly(4‐vinyl phenol)/poly (trimethylene terephthalate)

Lee

Woo

2004

Polymer International

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A new miscible blend of all compositions comprising poly(4-vinyl phenol) (PVPh) and poly(trimethylene terephthalate) (PTT) was discovered and reported. The blends exhibit a single composition-dependent glass transition and homogeneous phase morphology, with no lower critical solution temperature (LCST) behavior upon heating to high temperatures. Interactions and spherulite growth kinetics in the blends were also investigated. The Flory-Huggins interaction parameter (χ 12 ) and interaction energy density (B) obtained from analysis of melting point depression are negative (χ 12 = −0.74 and B = −32.49 J cm −3 ), proving that the PVPh/PTT blends are miscible over a wide temperature range from ambient up to high temperatures in the melt state. FTIR studies showed evidence of hydrogenbonding interactions between the two polymers. The miscibility of PVPh with PTT also resulted in a reduction in spherulite growth rate of PTT in the miscible blend. The Lauritzen-Hoffman model was used to analyze the spherulite growth kinetics, which showed a lower fold-surface free energy (σ e ) of the blends than that of the neat PTT. The decrease in the fold-surface free energy has been attributed to disruption of the PTT lamellae exerted by PVPh in an intimately interacted miscible state.

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Section: Resultssupporting

confidence: 69%

“…The addition of an amorphous polymer into a semi‐crystalline polymer has an apparent effect on the kinetic parameters. Some work has been done on a few miscible polymer blends such as PVPh/PHB7, PEO/PMMA19 and PEO/poly(benzyl methacrylate) (PBzMA) 20…”

Section: Introductionmentioning

confidence: 99%

Miscible blends of poly(4‐vinyl phenol)/poly (trimethylene terephthalate)

Lee

Woo

2004

Polymer International

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“…For comparison, this value is closed to that k was 0.145-0.45 for the poly(phenyl methacrylate)/PEO blend, 41 and k was ∼0.17 for the poly(benzyl methacrylate)/PEO blend. 42 This low value of k suggests that the intermolecular interactions in this system is not strong. The deviation of experimental T g from the Gordon-Taylor equation at higher PEO content is due to the crystallization of PEO in the blends during quenching.…”

Section: Resultsmentioning

confidence: 99%

“…The same trend in the surface free energy of chain folding was also observed in the PBzMA/PEO blend system: it decreases with increasing PBzMA content in that blend. 42 This result indicates that the amorphous component of PAS reduces the surface free energy of chain folding and provides the driving force for crystallization of PEO, which is consistent with our previous study. 53 The relative weakly interacting blends such as the SAN/PCL, PVAc/PEO, PVAc/PHB, and phenoxy/PCL blends would have lower surface free energy of chain folding than that of pure crystallizable polymer.…”

Section: Analyses By Fourier Transform Infrared Spectroscopymentioning

confidence: 99%

Miscibility, Specific Interactions, and Spherulite Growth Rates of Binary Poly(acetoxystyrene)/Poly(ethylene oxide) Blends

Kuo

Huang

et al. 2004

Macromolecules

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The binary poly(acetoxystyrene)/poly(ethylene oxide) (PAS/PEO) blend system is fully miscible, as evidenced by a single glass transition temperature over a full range of compositions when analyzed by differential scanning calorimetry analysis, as a result of weak C-H‚‚‚O hydrogen-bonding interactions between the carbonyl groups of PAS and the methylene groups of PEO. One-and two-dimensional correlation spectroscopies provide positive evidence for this specific interaction between the two polymers. In addition, a negative polymer-polymer interaction parameter " 12" was calculated using the Flory-Huggins equation based on the melting depression of PEO. The presence of an amorphous PAS phase results in a reduction in the spherulite growth rate of PEO. Both the values of nucleation constant and the surface free energy of chain folding of PEO decrease with increasing PAS content, which indicates that the crystallization ability of PEO increases correspondingly.

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“…The crystallization behavior of poly(ethylene oxide) (PEO) in neat homopolymer and blends, such as PEO/poly(hydroxy butyrate) (PHB),7–9 PEO/poly(ether sulfone),1, 10 PEO/poly(methyl methacrylate),6, 11, 12 PEO/polyamide,13 and PEO/poly(benzyl methacrylate) (PBzMA),14 was studied because of its simple chemical structure and high crystallinity. Talibuddin et al6 investigated PEO crystallization behavior depending on the degree of the interaction with amorphous polymers.…”

Section: Introductionmentioning

confidence: 99%

Phase behavior and crystallization of a poly(ethylene oxide)/cellulose acetate butyrate blend

Park

Kim

2002

J Polym Sci B Polym Phys

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The phase behavior of a partially miscible blend of poly(ethylene oxide) (PEO) and cellulose acetate butyrate (CAB) and the crystalline microstructure of PEO in the blend were studied with differential scanning calorimetry (DSC), optical microscopy, and synchrotron small-angle X-ray scattering (SAXS) methods. PEO/CAB showed a lower critical solution temperature (LCST) of 168°C at the critical composition of PEO of 60 wt %. All blend compositions showed a single glass-transition temperature (T g ) when they were prepared at temperatures lower than the LCST. However, with increasing CAB content, T g of the blend changed abruptly at 70 wt % CAB; that is, a cusp existed. Below 70 wt % CAB, the change in T g with blend composition was predicted by the Brau-Kovacs equation, whereas this change was predicted by the Fox equation at higher CAB contents. A gradual but small depression of the melting point of PEO in the blend with an increasing amount of CAB suggested that the PEO/CAB blends exhibited a weak intermolecular interaction. From DSC and SAXS experiments, it was found that amorphous CAB was incorporated into the interlamellar region of PEO for blends with less than 20 wt % CAB, whereas it was segregated to exist in the interfibrillar region in PEO for other blends with larger amounts of CAB.

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Miscibility and spherulite growth kinetics in the poly(ethylene oxide)/poly(benzyl methacrylate) system

Cited by 19 publications

References 32 publications

Miscible blends of poly(4‐vinyl phenol)/poly (trimethylene terephthalate)

Miscible blends of poly(4‐vinyl phenol)/poly (trimethylene terephthalate)

Miscibility, Specific Interactions, and Spherulite Growth Rates of Binary Poly(acetoxystyrene)/Poly(ethylene oxide) Blends

Phase behavior and crystallization of a poly(ethylene oxide)/cellulose acetate butyrate blend

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