Surface studies of UV-irradiated poly(vinyl chloride)/poly(methyl methacrylate) blends

Kowalonek, Jolanta

doi:10.1016/j.polymdegradstab.2016.09.016

Cited by 21 publications

(7 citation statements)

References 66 publications

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“…Band assignments for specific groups in PMMA, PVC, PMMA/PVC blends have been already reported in the literature [12,14,[18][19][20][21][22][23]. Regarding to some different assignments, Table 2 presents band assignments for PMMA/PVC blends which are based on previous theoretical and experimental studies on neat PMMA, PVC [24][25][26][27][28][29][30], in combination with our experimental FTIR study. In spectra of PMMA/PVC blends, some peaks are unchanged in comparison with neat PMMA and neat PVC, however, some bands are overlapped or absent and shifted to another positions.…”

Section: Groups Assignments and Molecular Interactions In Pmma/pvc Blendsmentioning

confidence: 73%

“…It is noted that there are hydrogen bonds between HC-Cl groups in the PVC phase (Cl-C-H…Cl-C-H). However, the absence of some characteristic bands of HC-Cl groups and the overlapping phenomena possibly arise from the formations of new hydrogen bonds (Cl-C-H…O=C-O) and polar interactions (HC-Cl δ-… δ+ C=O) between CHCl groups of PVC with O-C=O groups of PMMA in their blends [30].…”

Section: Groups Assignments and Molecular Interactions In Pmma/pvc Blendsmentioning

confidence: 99%

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PREPARATION AND FTIR STUDIES OF PMMA/PVC POLYMER BLENDS, PVC-g-PMMA GRAFT COPOLYMERS AND EVALUATING GRAFT CONTENT

Tham

Thi

Hoàng

et al. 2019

JST

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This study presents the qualitative and quantitative analyses of Fourier Transform Infrared (FTIR) spectra of poly(methyl methacrylate)/poly(vinyl chloride) blends (PMMA/PVC), as well as PVC-g-PMMA graft copolymers. Graft copolymerizations of methyl mathacrylate (MMA) onto PVC macromolecules were carried out mixture of cyclohexanone/N,N-dimethylformamide as solvents, dibenzoyl peroxide as initiator and nitrogen medium. FTIR spectra of PMMA/PVC blends showed that there were molecular interactions between C=O groups of PMMA and C-Cl groups of PVC. Assignments of infrared absorption bands for specific groups of PMMA/PVC blends have been contributed. Using regression method, linear calibration curve between PMMA mole content and peak areas of C=O groups in FTIR spectra of the blends has been found when C=O peak areas were multiplied by an appropriate factor. PMMA grafted content and total PMMA formed content in PVC-g-PMMA graft copolymers have been evaluated. The results showed that grafted PMMA content was increased since PVC was initiatly dechlorinated by NaOH solution. The grafted PMMA content and total formed PMMA content were 5.05 wt.% and 11.25 wt.% respectively when MMA monomers were grafted onto neat PVC and modified PVC molecules.

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Section: Groups Assignments and Molecular Interactions In Pmma/pvc Blendsmentioning

confidence: 73%

Section: Groups Assignments and Molecular Interactions In Pmma/pvc Blendsmentioning

confidence: 99%

PREPARATION AND FTIR STUDIES OF PMMA/PVC POLYMER BLENDS, PVC-g-PMMA GRAFT COPOLYMERS AND EVALUATING GRAFT CONTENT

Tham

Thi

Hoàng

et al. 2019

JST

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“…FT-IR spectroscopy is a common method for evaluating chemical changes during the UV degradation process in epoxy and polymeric systems [ 18 , 35 , 36 , 37 , 38 ]. The effects of UV light on the epoxy structure can be studied by FT-IR.…”

Section: Resultsmentioning

confidence: 99%

The Effects of UV Light on the Chemical and Mechanical Properties of a Transparent Epoxy-Diamine System in the Presence of an Organic UV Absorber

et al. 2017

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Despite several excellent properties including low shrinkage, good chemical resistance, curable at low temperatures and the absence of byproducts or volatiles, epoxy resins are susceptible to ultra violet (UV) damage and their durability is reduced substantially when exposed to outdoor environments. To overcome this drawback, UV absorbers have been usually used to decrease the rate of UV degradation. In this present study, the effects of UV light on the chemical, mechanical and physical properties of cured epoxy structure, as well as the effect of an organic UV absorber, Tinuvin 1130, on the epoxy properties were investigated. Chemical changes in a cured epoxy system as a result of the presence and absence of Tinuvin 1130 were determined using Fourier transform infrared spectroscopy (FT-IR) analyses. The effect of Tinuvin 1130 on the surface morphology of the epoxy systems was also investigated by scanning electron microscopy (SEM) imaging. Additionally, the glass transition temperatures (T g ) before and during UV radiation were measured. After an 800 h UV radiation, mechanical test results revealed that the lack of the UV absorber can lead to a~30% reduction in tensile strength. However, in the presence of Tinuvin 1130, the tensile strength was reduced only by~11%. It was hypothesized that the use of Tinuvin 1130, as an organic UV absorber in the epoxy-amine system, could decrease the undesirable effects, arising from exposure to UV light.

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“…The bands that undergo prominent changes are the functionalities of hydroxyl O–H, carbonyl C=O and ester (C–O–C) in region of wavenumber from 746 to 1435 cm −1 . Other photo products, e.g., carbonyl groups or double bonds may be weakened from the surfaces, leading to reduced absorption [ 42 ].…”

Section: Resultsmentioning

confidence: 99%

Effect of UV Radiation on Optical Properties and Hardness of Transparent Wood

et al. 2021

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Optically transparent wood is a type of composite material, combining wood as a renewable resource with the optical and mechanical properties of synthetic polymers. During this study, the effect of monochromatic UV-C (λ—250 nm) radiation on transparent wood was evaluated. Samples of basswood were treated using a lignin modification method, to preserve most of the lignin, and subsequently impregnated with refractive-index-matched types of acrylic polymers (methyl methacrylate, 2-hydroxyethyl methacrylate). Optical (transmittance, colour) and mechanical (shore D hardness) properties were measured to describe the degradation process over 35 days. The transmittance of the samples was significantly decreased during the first seven days (12% EMA, 15% MMA). The average lightness of both materials decreased by 10% (EMA) and 17% (MMA), and the colour shifted towards a red and yellow area of CIE L*a*b* space coordinates. The influence of UV-C radiation on the hardness of the samples was statistically insignificant (W+MMA 84.98 ± 2.05; W+EMA 84.89 ± 2.46), therefore the hardness mainly depends on the hardness of used acrylic polymer. The obtained results can be used to assess the effect of disinfection of transparent wood surfaces with UV-C radiation (e.g., due to inactivation of SARS-CoV-2 virus) on the change of its aesthetic and mechanical properties.

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Surface studies of UV-irradiated poly(vinyl chloride)/poly(methyl methacrylate) blends

Cited by 21 publications

References 66 publications

PREPARATION AND FTIR STUDIES OF PMMA/PVC POLYMER BLENDS, PVC-g-PMMA GRAFT COPOLYMERS AND EVALUATING GRAFT CONTENT

PREPARATION AND FTIR STUDIES OF PMMA/PVC POLYMER BLENDS, PVC-g-PMMA GRAFT COPOLYMERS AND EVALUATING GRAFT CONTENT

The Effects of UV Light on the Chemical and Mechanical Properties of a Transparent Epoxy-Diamine System in the Presence of an Organic UV Absorber

Effect of UV Radiation on Optical Properties and Hardness of Transparent Wood

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