Crystallization and Segregation Behavior at the Submicrometer Scale of PCL/PEG Blends

Nguyen-Tri, Phuong; Prud’homme, Robert E.

doi:10.1021/acs.macromol.8b01503

Cited by 34 publications

(27 citation statements)

References 45 publications

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“…Our study offers a better understanding of the long-term degradation of PCL-blend-PEG coatings. PEG and PCL are immiscible polymers and they phase-separate in the solid state, as recently reported in the literature [67][68][69]. Therefore, in an early stage, after the PCL-blend-PEG's immersion, the first released material is mainly identified as the water-soluble PEG component, while for long term immersion periods, residual products of insoluble CL oligomers result due to the slow degradation of the PCL [70].…”

Section: Coating Degradation Behaviormentioning

confidence: 62%

Long-Term Evaluation of Dip-Coated PCL-Blend-PEG Coatings in Simulated Conditions

et al. 2020

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Our study focused on the long-term degradation under simulated conditions of coatings based on different compositions of polycaprolactone-polyethylene glycol blends (PCL-blend-PEG), fabricated for titanium implants by a dip-coating technique. The degradation behavior of polymeric coatings was evaluated by polymer mass loss measurements of the PCL-blend-PEG during immersion in SBF up to 16 weeks and correlated with those yielded from electrochemical experiments. The results are thoroughly supported by extensive compositional and surface analyses (FTIR, GIXRD, SEM, and wettability investigations). We found that the degradation behavior of PCL-blend-PEG coatings is governed by the properties of the main polymer constituents: the PEG solubilizes fast, immediately after the immersion, while the PCL degrades slowly over the whole period of time. Furthermore, the results evidence that the alteration of blend coatings is strongly enhanced by the increase in PEG content. The biological assessment unveiled the beneficial influence of PCL-blend-PEG coatings for the adhesion and spreading of both human-derived mesenchymal stem cells and endothelial cells.

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Section: Coating Degradation Behaviormentioning

confidence: 62%

Long-Term Evaluation of Dip-Coated PCL-Blend-PEG Coatings in Simulated Conditions

et al. 2020

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“…Several investigations have been reported on the effect of industrial contaminants on the morphology, mechanical properties and structure of glove material. In previous works [15][16][17][18][19][20][21][22][23][24], we reported that polymers and composites [16][17][18][19][20]22,23,[25][26][27][28][29][30][31][32][33][34][35][36][37][38][39][40][41] can be degraded by several aging agents such as heat, water, humidity, oxygen, ozone and various other environments factors [16][17][18][19][20][21][22][23][24]. The scission, crosslinking and plasticization of polymer networks may occur and led to severe deterioration of the mechanical and physicochemical properties of the material [42], which are quite important with regard their applications in various fields of mechanical engineering.…”

Section: Introductionmentioning

confidence: 99%

Butyl Rubber-Based Composite: Thermal Degradation and Prediction of Service Lifetime

2019

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Butyl rubber-based composite (BRC) is one of the most popular materials for the fabrication of protective gloves against chemical and mechanical risks. However, in many workplaces, such as metal manufacturing or automotive mechanical services, its mechanical hazards usually appear together with metalworking fluids (MWFs). The presence of these contaminants, particularly at high temperatures, could modify its properties due to the scission, the plasticization and the crosslinking of the polymer network and thus lead to severe modification of the mechanical and physicochemical properties of material. This work aims to determine the effect of temperature and a metalworking fluid on the mechanical behavior of butyl rubber composite, dealing with crosslinking density, cohesion forces and the elastic constant of BRC, based on Mooney–Rivlin’s theory. The effect of temperature with and without MWFs on the thermo-dynamical properties and morphology of butyl membranes was also investigated. The prediction of service lifetime was then evaluated from the extrapolation of the Arrhenius plot at different temperatures.

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“…Recently, we have successfully used AFM-IR to shed light on some scientific questions related to: (i) the aging mechanism at the surface of organic coatings; 37 (ii) the complementary understanding of the aging mechanism of a polyester fiber; 38 (iii) the grafting of the polyvinyl pyridine-like polymeric film on a titanium nitride wafer; 39 and (iv) the crystallization behavior of immiscible 10 and miscible blends. 11 In this article, AFM-IR in combination with polarized optical microscopy (POM) are mainly used to investigate the transcrystallization phenomena of a PCL/PVC blend with the presence of a single milkweed fiber in terms of the crystal growth mechanism, spherulite morphology, and polymer diffusion.…”

Section: Introductionmentioning

confidence: 99%

Graphene Oxide-Induced Interfacial Transcrystallization of Single-Fiber Milkweed/Polycaprolactone/Polyvinylchloride Composites

et al. 2020

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Understanding the interfacial crystallization is crucial for semi-crystalline polymer/natural fiber composites because it links to the final properties. This work reports, for the first time, the interfacial crystallization of a miscible blend between polycaprolactone (PCL) and polyvinylchloride (PVC) with milkweed fibers. We have first described the morphology of the fibers and the chemical composition of waxes covered on its surface. Our findings show that the transcrystallization (TC) layer of PCL/PVC could appear at the interface by simply coating with a layer of graphene oxide (GO) on the milkweed fiber. In our study, atomic force microscopy–infrared spectroscopy analysis shows that the crystallinity of the blends is higher at the vicinity of the interface compared to that in the bulk. The kinetic of the interfacial crystallization in terms of spherulite morphology and crystal growth rates at the nanoscale is examined. X-ray photoelectron spectroscopy and high-resolution transmission electron microscopy were used to analyze the prepared GO and evaluate its relationship with the interfacial crystallization behavior of the blends.

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Crystallization and Segregation Behavior at the Submicrometer Scale of PCL/PEG Blends

Cited by 34 publications

References 45 publications

Long-Term Evaluation of Dip-Coated PCL-Blend-PEG Coatings in Simulated Conditions

Long-Term Evaluation of Dip-Coated PCL-Blend-PEG Coatings in Simulated Conditions

Butyl Rubber-Based Composite: Thermal Degradation and Prediction of Service Lifetime

Graphene Oxide-Induced Interfacial Transcrystallization of Single-Fiber Milkweed/Polycaprolactone/Polyvinylchloride Composites

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