Morphologies of miscible PCL/PVC blends confined in ultrathin films

Mamun, Al; Mareau, Vincent H.; Chen, Jian; Prud’homme, Robert E.

doi:10.1016/j.polymer.2014.03.010

Cited by 32 publications

(43 citation statements)

References 28 publications

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“…Thus, it is naturally expected that the miscible polymer blends will show a more complicated morphology during crystallization in the ultrathin films. Reports on the crystallization of polymer blends in ultrathin films are few; just the crystallization behavior and morphology of several blend systems such as PEO/poly(methyl methacrylate) (PMMA) [101,102], PCL/poly(vinyl chloride) (PVC) [103], PLLA/PHB [104], PLLA/PBA [105,106] and PLLA/poly(D-lactic acid) (PDLA) blends [107][108][109] in ultrathin films have been reported in the literature. Among these blend systems, PLLA/PDLA blend is a unique and interesting system because these two isotactic polyenantiomers, PLLA and PDLA, can form stereocomplexes in their blends [110,111].…”

Section: Crystalline Morphology Of Polymers Confined In Miscible Blendsmentioning

confidence: 99%

Crystalline and Spherulitic Morphology of Polymers Crystallized in Confined Systems

Xie

Bao

et al. 2017

Crystals

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Due to the effects of microphase separation and physical dimensions, confinement widely exists in the multi-component polymer systems (e.g., polymer blends, copolymers) and the polymers having nanoscale dimensions, such as thin films and nanofibers. Semicrystalline polymers usually show different crystallization kinetics, crystalline structure and morphology from the bulk when they are confined in the nanoscale environments; this may dramatically influence the physical performances of the resulting materials. Therefore, investigations on the crystalline and spherulitic morphology of semicrystalline polymers in confined systems are essential from both scientific and technological viewpoints; significant progresses have been achieved in this field in recent years. In this article, we will review the recent research progresses on the crystalline and spherulitic morphology of polymers crystallized in the nanoscale confined environments. According to the types of confined systems, crystalline, spherulitic morphology and morphological evolution of semicrystalline polymers in the ultrathin films, miscible polymer blends and block copolymers will be summarized and reviewed.

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Section: Crystalline Morphology Of Polymers Confined In Miscible Blendsmentioning

confidence: 99%

Crystalline and Spherulitic Morphology of Polymers Crystallized in Confined Systems

Xie

Bao

et al. 2017

Crystals

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“…This suggests that the PET/PEN copolymers in this study have co- These morphologies are reminiscent of the study on ultrathin films of poly(ε-caprolactone)/poly(vinyl chloride) (PCL/PVC), [47] and poly (L-lactide)/poly(D-lactide) (PLLA/PDLA) [39,48,49] blends, which produced lamellar curvatures of both handedness. PEN was observed to show curved crystals in very thin films [24] in which crystallization is highly constrained, but otherwise such morphology was only observed in the highly random copolymers in the PET/PEN system.…”

Section: Copolymers 3 and 4 Show Intermediate Growth Rate This Is As Wementioning

confidence: 59%

Crystalline morphologies at the surface of PET/PEN random copolymer films

Shinotsuka

Assender

2019

Polymer Crystallization

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Crystalline Morphologies of the Surface of Random Copolymer Films In their work reported in article e10087, Shinotsuka and Assender demonstrate that polymers can crystallize preferentially at the free surface when annealed at temperatures between the surface and bulk glass transition temperatures, forming dendritic structures observable by AFM. This is a near‐surface rather than a thin‐film phenomenon. A 436nm thick 50/50 PET/PEN random copolymer shows surface crystallization at a temperature 90°C lower than bulk crystallization. In 31nm films, the crystallization is affected by the confinement of the thin film and the first stages of crystallization, near the nucleus, form with one morphology (orientation) and then switch to clearer dendrites, likely of edge‐on orientation. (DOI: https://doi.org/10.1002/pcr2.10087)

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“…The miscibility and morphology of the SAN/CPE blends prepared by solvent cast method was previously analyzed [17]. Here we are reporting the details mechanical properties of these SAN/CPE blends.…”

Section: Canadian Chemical Transactionsmentioning

confidence: 99%

“…The SAN/CPE blend containing 25 and 36% of Cl shows exponential decrease of break load with CPE for all compositions, while blend containing 42 and 48% of Cl shows less exponential decrease of break load with increase in fraction of CPE in the blend. This is related to the compatibility of the copolymers where various degrees of compatibility are possible ranging from complete miscibility to phase separation [1,17] where a linear decrease is a signature of incompatible mixing of the two components. The relationship between %CPE and load at break of SAN/CPE blends for 42 and 48% of Cl content in CPE, small positive deviation from the linearity indicates relatively poor compatibility, where a large positive deviation from the linearity for 25 and 36% of Cl content in blend (exponential decrease) shows relatively better compatibility of mixing The elongation at break of the blends increases with CPE content, with the effect more pronounced as the Cl content in CPE increases (Figure 4).…”

Section: Effect Of CL Content In Blendsmentioning

confidence: 99%

“…CPE can be blended as impact modifier for brittle SAN to improve mechanical properties. Many studies have been reported to improve the compatibility that results the final mechanical properties of SAN by blending with other polymers including nylon [5], poly(phenylacrylate) [6], polyvinyl chloride (PVC) [7,8], poly carbonate [3,9], poly(caprolactone) [10][11][12], polypropylene [13]. Compatibility is a technical term defining the property profile of the blend in view of a certain application and, it is a function of the interaction of polymer molecules in the blend and can be detected using various methods including mechanical and interfacial measurements.…”

Section: Introductionmentioning

confidence: 99%

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Mechanical Properties of Styrene Acrylonitrile and Chlorinated Polyethylene Blends: Effect of Chlorine Content

2014

Can Chem Trans

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Abstract:The mechanical properties of binary blends of styrene acrylonitrile (SAN) and chlorinated polyethylene (CPE) were investigated. Blend compositions ranging from pure SAN to CPE, in 10% increments, in solution, and used to investigate mechanical properties as a function of compositions, chlorine (Cl) content in CPE and temperatures. In general, the mechanical properties of the SAN/CPE blends were found to be between the values of the corresponding pure components. Comparison of the yield stress and modulus of the blends with Cl content in CPE showed that these properties are in decreasing order: SAN/CPE(25%), SAN/CPE(36%), SAN/CPE(42%) and SAN/CPE(48%). For any blend composition, Young's modulus decreases with temperature and levels off at and above ~100 o C.

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Morphologies of miscible PCL/PVC blends confined in ultrathin films

Cited by 32 publications

References 28 publications

Crystalline and Spherulitic Morphology of Polymers Crystallized in Confined Systems

Crystalline and Spherulitic Morphology of Polymers Crystallized in Confined Systems

Crystalline morphologies at the surface of PET/PEN random copolymer films

Mechanical Properties of Styrene Acrylonitrile and Chlorinated Polyethylene Blends: Effect of Chlorine Content

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