Water absorption by uncrosslinked polymers, networks and IPNs having medium to high polarity

Merdas, I.; Tcharkhtchi, Abbas; Thominette, F.; Verdú, J.; Dean, Katherine; Cook, Wayne D.

doi:10.1016/s0032-3861(02)00267-7

Cited by 42 publications

(32 citation statements)

References 16 publications

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“…On the other hand, D strongly depends on the molecular mobility. 26 It is worth noting that our sorption data are similar to those of Merdas et al 26 According to Figure 10 the relative amount of Cal-EP + Al-Am controls the sorption and diffusion behavior of the VE/EP hybrids. Further investigations are needed, however, to check whether IPN structural parameters (strand width, roughness) correlate with the sorption/diffusion performance.…”

Section: Water Uptake and Diffusionsupporting

confidence: 80%

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Nanostructure in Hybrid Thermosets with Interpenetrating Networks and its Effect on Properties

Gryshchuk¹,

Karger‐Kocsis²

2006

J. Nanosci. Nanotech.

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Hybrid resins composed of vinylester (VE) and aliphatic amine (Al-Am)-cured cycloaliphatic epoxy (Cal-EP) were produced and their morphology and properties (toughness, water uptake) determined. According to atomic force microscopy (AFM) results achieved on physically etched (ion eroded) specimens the hybrid resins possessed a nanoscaled interpenetrating network (IPN) structure, the characteristics of which depended on the VE/EP ratio. Characteristics of the IPN morphology, viz strand width and mean roughness data increase with increasing amount of the EP component. The fracture mechanical data (K(Q) and G(Q)) pass a maximum as a function of the VE/EP ratio, similar to that of the phase segregation term (alpha). The latter was deduced from dynamic-mechanical thermal analysis (DMTA) traces. The water sorption and diffusion behavior of the interpenetrated VE/EP hybrids were controlled by the relative amount of the EP (Cal-EP+Al-Am) used.

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Section: Water Uptake and Diffusionsupporting

confidence: 80%

“…Attention should be paid to the fact that the water sorption of many IPNs is greater than that of the parent resins. 26 There is one more aspect we have to tackle. The IPN structured hybrids have different major relaxation transitions (T g -cf.…”

Section: Water Uptake and Diffusionmentioning

confidence: 99%

Nanostructure in Hybrid Thermosets with Interpenetrating Networks and its Effect on Properties

Gryshchuk¹,

Karger‐Kocsis²

2006

J. Nanosci. Nanotech.

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“…As demonstrated by Ref. [21], and mentioned by Ref. [20], the lack of correlation between the equilibrium water content and the aging temperature is a likely occurrence with systems with a medium polarity, such as the epoxies of this work.…”

Section: Water Uptakementioning

confidence: 53%

Water diffusion and swelling stresses in highly crosslinked epoxy matrices

Toscano

Pitarresi

Scafidi

et al. 2016

Polymer Degradation and Stability

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“…This species resulted from reaction occuring between the photogenerated hole-electron pairs and, water and O 2 molecules [62][63][64]. Despite the fact that the studied acrylate photopolymer was hydrophobic, the presence of hydrophilic groups such as C=O and CH 2 CH 2 O allowed sorption of water molecules [65][66][67]. Thus, the higher amount of particles in the polymer is, the higher concentration of HO • is and finally the more important the photocatalytic effect is.…”

Section: Figmentioning

confidence: 99%

Effects of ZnO quantum dots on the photostability of acrylate photopolymers used as recording materials

Goourey

Wong-Wah-Chung

Balan

et al. 2018

Polymer Degradation and Stability

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ZnO quantum dots, QDs (5 nm diameter) by their photogenerated charge carriers clearly influence the degradation of the acrylate host matrix, under conditions simulating solar light.As a result, QDs undergo a partial quenching of their fluorescence. To rationalize this influence, the investigation requires understanding the photochemical behavior of the acrylate photopolymer (carrier of ester and ether groups) in the absence of nanofiller. The matrix undergoes simultaneously a post-polymerization and photooxidative degradation. Infrared analysis and headspace gas chromatography coupled with mass spectrometry reveal that the main volatile organic compounds result from the oxidation of the ether groups, supposed to be the primary sites of degradation.The nanofiller increases the rate of degradation. Also, the concentration of the volatile organic compounds is all the more important as the doping percentage increases. However, the photostability of ZnO/polymer material strongly depends on the size of the nanoparticles.Whereas ZnO QDs display a photocatalytic effect, nanoparticles with a bigger size (10-30 nm) exhibit an unexpected UV-screening effect.

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Water absorption by uncrosslinked polymers, networks and IPNs having medium to high polarity

Cited by 42 publications

References 16 publications

Nanostructure in Hybrid Thermosets with Interpenetrating Networks and its Effect on Properties

Nanostructure in Hybrid Thermosets with Interpenetrating Networks and its Effect on Properties

Water diffusion and swelling stresses in highly crosslinked epoxy matrices

Effects of ZnO quantum dots on the photostability of acrylate photopolymers used as recording materials

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