Poor solvent as a nucleating agent to induce poly(ε-caprolactone) ultrathin film crystallization on poly(vinylpyrrolidone) substrate

Guo, Caixia; Huo, Hong

doi:10.1007/s00396-015-3821-3

Cited by 2 publications

(2 citation statements)

References 43 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…Moreover, it is important to note that no characteristic forms of OCL crystallization appeared during Chl evaporation in any of the investigated areas.There were several reasons for this. As was stated before, mica is not an appropriate support to study PCL crystallization [ 84 ] because, due to the difference in the polarity between Chl and hydrophilic mica, when a solution of PCL in Chl was spun onto it, the hydrophobic PCL was dewetted thereon, thus forming droplets in order to minimize the free energy [ 85 ]. It has been explained that when such droplets form, their high surface tension prevents the crystallization of semicrystalline polymers; thus, it is difficult to make them have a lamellar morphology [ 86 ].…”

Section: Resultsmentioning

confidence: 99%

“…It could be assumed that, in the case of EDOT-PCL , as is the case for other microphase-separated asymmetric diblock copolymers [ 124 ], a structural relaxation of OCL takes place during solvent evaporation, inducing disintegration of the microphase separated structures, thus allowing for breakout crystallization and the formation of SCs. In view of all these phenomena, the role of the ACN solvent should not be overlooked because it was reported that a poor solvent could function as a nucleating agent able to induce PCL ultrathin film crystallization [ 84 ].…”

Section: Resultsmentioning

confidence: 99%

See 1 more Smart Citation

3,4-Ethylenedioxythiophene (EDOT) End-Group Functionalized Poly-ε-caprolactone (PCL): Self-Assembly in Organic Solvents and Its Coincidentally Observed Peculiar Behavior in Thin Film and Protonated Media

Bendrea¹,

Cianga²,

Ailiesei³

et al. 2021

Polymers

View full text Add to dashboard Cite

End-group functionalization of homopolymers is a valuable way to produce high-fidelity nanostructured and functional soft materials when the structures obtained have the capacity for self-assembly (SA) encoded in their structural details. Herein, an end-functionalized PCL with a π-conjugated EDOT moiety, (EDOT-PCL), designed exclusively from hydrophobic domains, as a functional “hydrophobic amphiphile”, was synthesized in the bulk ROP of ε-caprolactone. The experimental results obtained by spectroscopic methods, including NMR, UV-vis, and fluorescence, using DLS and by AFM, confirm that in solvents with extremely different polarities (chloroform and acetonitrile), EDOT-PCL presents an interaction- and structure-based bias, which is strong and selective enough to exert control over supramolecular packing, both in dispersions and in the film state. This leads to the diversity of SA structures, including spheroidal, straight, and helical rods, as well as orthorhombic single crystals, with solvent-dependent shapes and sizes, confirming that EDOT-PCL behaves as a “block-molecule”. According to the results from AFM imaging, an unexpected transformation of micelle-type nanostructures into single 2D lamellar crystals, through breakout crystallization, took place by simple acetonitrile evaporation during the formation of the film on the mica support at room temperature. Moreover, EDOT-PCL’s propensity for spontaneous oxidant-free oligomerization in acidic media was proposed as a presumptive answer for the unexpected appearance of blue color during its dissolution in CDCl3 at a high concentration. FT-IR, UV-vis, and fluorescence techniques were used to support this claim. Besides being intriguing and unforeseen, the experimental findings concerning EDOT-PCL have raised new and interesting questions that deserve to be addressed in future research.

show abstract

Section: Resultsmentioning

confidence: 99%

Section: Resultsmentioning

confidence: 99%

3,4-Ethylenedioxythiophene (EDOT) End-Group Functionalized Poly-ε-caprolactone (PCL): Self-Assembly in Organic Solvents and Its Coincidentally Observed Peculiar Behavior in Thin Film and Protonated Media

Bendrea¹,

Cianga²,

Ailiesei³

et al. 2021

Polymers

View full text Add to dashboard Cite

show abstract

Atomic Force Microscopy, Transmission Electron Microscopy, Scanning Electron Microscopy, and FourierTransform‐InfraredSpectroscopic Imaging as Tools to Study Various Phenomena Involving Poly(Vinylpyrrolidone)

McMullen

2021

Handbook of Pyrrolidone and Caprolactam Based Materials

View full text Add to dashboard Cite

This chapter examine state‐of‐the‐art advanced imaging techniques and how these tools can be used to study polymer blends and composites containing poly(vinylpyrrolidone) (PVP) and its derivatives. The imaging technologies discussed consist of many of the modes of atomic force microscopy as well as basic and advanced methods in transmission electron microscopy (TEM) and scanning electron microscopy (SEM). There are two principal types of electron microscopy, SEM and TEM. Both techniques provide different types of information about the sample under investigation. The chapter demonstrates the use of Fourier transform–infrared (FT‐IR) spectroscopic imaging to spatially map elements of multicomponent systems. FT‐IR spectroscopic imaging is a technique that involves the coupling of an FT‐IR spectrometer with an optical microscope. Powerful tool based on AFM and IR spectroscopy has become available to researchers. The chapter also demonstrates the use of imaging technologies to characterize PVP‐metal nanoparticle composites with a specific focus on silver and gold particles.

show abstract

Poor solvent as a nucleating agent to induce poly(ε-caprolactone) ultrathin film crystallization on poly(vinylpyrrolidone) substrate

Cited by 2 publications

References 43 publications

3,4-Ethylenedioxythiophene (EDOT) End-Group Functionalized Poly-ε-caprolactone (PCL): Self-Assembly in Organic Solvents and Its Coincidentally Observed Peculiar Behavior in Thin Film and Protonated Media

3,4-Ethylenedioxythiophene (EDOT) End-Group Functionalized Poly-ε-caprolactone (PCL): Self-Assembly in Organic Solvents and Its Coincidentally Observed Peculiar Behavior in Thin Film and Protonated Media

Atomic Force Microscopy, Transmission Electron Microscopy, Scanning Electron Microscopy, and FourierTransform‐InfraredSpectroscopic Imaging as Tools to Study Various Phenomena Involving Poly(Vinylpyrrolidone)

Contact Info

Product

Resources

About