Nuclear magnetic resonance study of poly(iε-caprolactone) and its blends with poly(vinyl chloride)

Albert, B.; Jérôme, Robert; Teyssié, Philippe; Smyth, Gerard; McBrierty, Vincent J.

doi:10.1021/ma00142a015

Cited by 18 publications

(6 citation statements)

References 7 publications

(10 reference statements)

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“…This suggests that due to the aforesaid interactions, the component polymer chains are brought closer, of course to different levels. This interpretation agrees very well with literature that the binary blend of PVC/PCL is miscible at all compositions with varying level of miscibility and the compatibility is attributed to the interaction between polar oxygen of PCL and proton of PVC …”

Section: Resultssupporting

confidence: 91%

Free volume as an internal material parameter to probe interfaces in ternary polymer blends: A positron lifetime study

Dinesh

Ranganathaiah

2013

J of Applied Polymer Sci

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A new method to characterize individual interfaces in ternary polymer blends from experimentally measured fractional free volume from Positron Annihilation Lifetime Spectroscopy (PALS) has been developed. By this, we derive the composition dependent miscibility level in ternary polymer blends. This method has its genesis in KRZ (Kirkwood-Risemann-Zimm) theory which introduces hydrodynamic interaction parameter as a measure of excess friction generated at the interface between dissimilar polymer chains resulting in energy dissipation. The method successfully applied for binary blends has been theoretically modified to suit ternary blends in the present work. The efficacy of this method has been tested for two ternary blends namely polycaprolactone/ poly(styrene-co-acrylonitrile)/poly(vinyl chloride) (PCL/SAN/PVC) and polycaprolactone/poly(vinyl chloride)/poly(vinyl acetate) (PCL/PVC/PVAc) in different compositions. We obtained a maximum effective hydrodynamic interaction (a eff ) of 212.60 at composition 80/10/10 of PCL/PVC/PVAc while PCL/SAN/PVC showed 21.60 at 68/16/16 composition. These results suggest that these compositions produce high miscibility level as compared to other compositions. DSC measurements have also been used to supplement positron results.

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Section: Resultssupporting

confidence: 91%

Free volume as an internal material parameter to probe interfaces in ternary polymer blends: A positron lifetime study

Dinesh

Ranganathaiah

2013

J of Applied Polymer Sci

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“…As already established by numerous researchers, PCL/PVC mixture is miscible in the whole composition range. This is mainly due the presence of specific interactions of hydrogen bonding type that occurred between the acid hydrogen of PVC and the carbonyl group of PCL .…”

Section: Resultsmentioning

confidence: 68%

Performances of PCL/PVC/Organoclay Nanobioblends Films for Packaging Applications

Hadj‐Hamou

Yahiaoui

2019

Macromolecular Symposia

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A series of antimicrobial PCL/PVC/OMMTs nanobioblends films are successfully prepared via melt blending process of the poly (ϵ‐caprolactone) (PCL), poly (vinyl chloride) (PVC), and three different clay types namely Cloisite 30B (C30B), trimethylhexadecyl ammonium (OMMT1), and cetylpyridinium chloride monohydrate (OMMT2) modified montmorillonite. All the PCL/PVC/OMMTs nanocomposites display mixed intercalated/partially exfoliated structures as attested by X‐Ray Diffraction and Transmission Electron Microscopy. Glass transition, fusion and cristallization of these nanomaterials are studied using differential scanning calorimetry (DSC). The organoclay effect on the mechanical, barrier and antimicrobial properties is investigated. The results confirm that the insertion of 3 wt% of OMMT (whatever its intercalant agent nature) into the PCL/PVC matrix leads to (1) a remarkable improvement in barrier properties, (2) an interesting enhancement in mechanical properties, and (3) a strong antimicrobial activity against Staphylococcus aureus (Gram‐positive) and Escherichia coli (Gram‐negative).

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“…Many experimental results indicated that blends containing 30 wt% could avoid the contributions from the crystalline phase of PCL. 22 Therefore, in the present study, the PCL component was presumed to be amorphous.…”

Section: Spin-labeled Pclmentioning

confidence: 92%

“…The sample temperature was controlled using a Bruker variable-temperature unit ER 4131 VT. All samples were maintained at the corresponding temperatures for 5 min prior to spectra acquisition to Table 1. Characterization of P(S-co-MAA) x copolymers and PCL Polymers Carboxylic 12 12.0 4.31 3.70 1.16 P(S-co-MAA) 22 21.9 3.09 2.44 1.27 P(S-co-MAA) 29 28.8…”

Section: Esr Measurementmentioning

confidence: 99%

“…12 T 5mT is usually regarded as a high-frequency glass transition temperature. 24 On the basis of Tailor's equation 1 we could calculate the PCL content in PCL -296 P(S-co-MAA) 22 21.9 346 P(S-co-MAA) 38 38.0 383 P(S-co-MAA)-rich phase according to the data in Table 2. It increased from 16 to 21% when the carboxylic acid content increased from 22 to 38 mol%.…”

Section: The Effect Of Intracomponent Cross-linking Densitymentioning

confidence: 99%

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ESR spin‐label study of poly(styrene‐co‐methacrylic acid)/poly(ε‐caprolactone) semi‐interpenetrating polymer networks with controlled hydrogen‐bond interactions

Qiu

Chen

Ping

et al. 2005

Magnetic Reson in Chemistry

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The morphology and miscibility of semi-interpenetrating polymer networks (semi-IPN) prepared with poly(styrene-co-methacrylic acid) [P(S-co-MAA)] of different carboxylic acid contents and poly(epsilon-caprolactone) (PCL) have been studied by ESR spin-label method. The ESR spectra of spin-labeled PCL showed one motional component at any specific temperature. It indicated that the spin-labeled molecules were located in one type of environment. The coexistence of two motional components in the ESR spectra of all semi-IPN samples was observed over a certain temperature range. This phenomenon suggested that the semi-IPNs were not compatible systems; they contained two microphases, a PCL-rich microdomain and a P(S-co-MAA)-rich microdomain. The miscibility could be improved by increasing the carboxylic acid content, which could enhance the hydrogen-bonding interactions between the ester groups of PCL and carboxylic acid groups in P(S-co-MAA). It was also found that the intracomponent cross-linking of the semi-IPNs was not in favor of the miscibility. The microphase separation occurred in all semi-IPNs, even in the samples having strong hydrogen-bonding interactions. With increasing cross-linking density, the microphase separation became more remarkable.

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Nuclear magnetic resonance study of poly(iε-caprolactone) and its blends with poly(vinyl chloride)

Cited by 18 publications

References 7 publications

Free volume as an internal material parameter to probe interfaces in ternary polymer blends: A positron lifetime study

Free volume as an internal material parameter to probe interfaces in ternary polymer blends: A positron lifetime study

Performances of PCL/PVC/Organoclay Nanobioblends Films for Packaging Applications

ESR spin‐label study of poly(styrene‐co‐methacrylic acid)/poly(ε‐caprolactone) semi‐interpenetrating polymer networks with controlled hydrogen‐bond interactions

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