Analysis of multi-layer polymer films

Guillory, Paulette; Deschaines, Tim; Henson, Pat

doi:10.1016/s1369-7021(09)70112-9

Cited by 7 publications

(4 citation statements)

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“…При исследовании многослойных полимерных композиций возможно определение не только толщины, но и состава каждого слоя. В таблице 1 приведено сравнение экспериментально полученных результатов с данными, заявленными производителем для шестислойной пленки [6].…”

Section: исследование многослойных полимерных пленокunclassified

Confocal Raman microscopy applications in the polymer industry

Виснер

2021

Plastičeskie massy

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Современная спектроскопия комбинационного рассеяния -мощный метод неразрушающего исследования полимеров в любой форме: гранулы, порошки и готовые изделия. Высокое пространственное разрешение спектрометров, снабженных конфокальным микроскопом, делает возможным точное определение размеров включений в полимер и других дефектов, а также толщин слоев многослойных композиций без трудоемкой пробоподготовки. Быстрый поиск по библиотекам спектров облегчает идентификацию отдельных компонентов композиции.Ключевые слова: спектроскопия комбинационного рассеяния, КР, Раман, анализ дефектов, включений, многослойных композиций Raman spectroscopy, in general, is well suited for polymer studies. The sample may be in any form, including beads, fi lms, or molded parts, and analyzed nondestructively with little or no preparation. Raman is sensitive to polymer microstructure along the backbone, crystallinity and conformation. Reliable quantitative methods are available to measure parameters such as copolymer ratios. As the popularity of confocal Raman microscopy grows, many other applications related to defect analysis, product characterization, and studies of competitive products will emerge.

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Section: исследование многослойных полимерных пленокunclassified

Confocal Raman microscopy applications in the polymer industry

Виснер

2021

Plastičeskie massy

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“…Multilayered polymers have been reported to have improved mechanical properties, such as ductility and impact strength, as the layer thickness is reduced [ 7 , 8 , 9 ]. The microlayered polymer films have been successfully used in industrial applications, such as food packaging and coating [ 10 , 11 , 12 ]. The 3M Company adopted multilayered polymers for light management in mirrors and the screens of laptop computers.…”

Section: Introductionmentioning

confidence: 99%

Effect of Layer and Film Thickness and Temperature on the Mechanical Property of Micro- and Nano-Layered PC/PMMA Films Subjected to Thermal Aging

et al. 2015

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Multilayered polymer films with biomimicking, layered structures have unique microstructures and many potential applications. However, a major limitation of polymer films is the deterioration of mechanical properties in working environments. To facilitate the design and development of multilayered polymer films, the impact of thermal aging on the mechanical behavior of micro- and nano-layered polymer films has been investigated experimentally. The composition of the polymer films that have been studied is 50 vol% polycarbonate (PC) and 50 vol% poly(methyl methacrylate) (PMMA). The current study focuses on the effect of film and layer thickness and temperature on the mechanical properties of the materials subjected to thermal aging. To study the effect of film and layer thickness, films with the same thickness, but various layer thicknesses, and films with the same layer thickness, but various film thicknesses, were thermally aged at 100 °C in a constant temperature oven for up to six weeks. The results show that as the layer thickness decreases to 31 nm, the film has a higher stiffness and strength, and the trend of the mechanical properties is relatively stable over aging. The ductility of all of the films decreases with aging time. To study the effect of temperature, the films with 4,096 layers (31 nm thick for each layer) were aged at 100 °C, 115 °C and 125 °C for up to four weeks. While the 100 °C aging results in a slight increase of the stiffness and strength of the films, the higher aging temperature caused a decrease of the stiffness and strength of the films. The ductility decreases with the aging time for all of the temperatures. The films become more brittle for higher aging temperatures.

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“…Raman microscopy has now been applied in a broad range of scientific investigations ranging from monitoring chemical reactions − to characterizing polymer films − to detecting cancer. − Biological applications are especially interesting because images based on Raman spectra can be obtained without the use of dyes or stains, thereby forming an important modality in the emerging field of chemical imaging . Ex vivo examinations of microscopic regions can provide both quantitative morphological and functional information, directly addressing needs in label-free, automated histopathology .…”

mentioning

confidence: 99%

Dark Field Raman Microscopy

et al. 2010

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Confocal Raman microscopy is often used for optical sectioning but is problematic when the sample plane of interest has a weak Raman cross-section/signal relative to areas that are out-of-focus. This is especially true for clinical samples in pathology, which consist of a thin tissue (approximately 5 microm) sample placed on a thick glass slide. Here, we recognize that the problem is the result of the extent of the illumination at the confocal plane being larger than the size of the sample and propose a dark field illumination scheme to efficiently reject substrate signals. The ability of several optical configurations in rejecting out-of-plane signal is investigated for two model systems: SU-8 photo resist over Teflon and SU-8 photo resist over polystyrene. The proposed reflective dark field approach, in which excitation converged to a focal point slightly above the focal plane of the collection optics, was found to be most effective in recording data from the sample. The proposed approach is validated by the rejection of substrate response (fluorescence) in spectra acquired from approximately 4 microm of breast tissue on a glass microscope slide. The proposed approach is easy to implement on existing confocal systems, has a straightforward optimization in acquiring data, and is not expected to result in loss of lateral resolution in mapping experiments.

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Analysis of multi-layer polymer films

Cited by 7 publications

References 0 publications

Confocal Raman microscopy applications in the polymer industry

Confocal Raman microscopy applications in the polymer industry

Effect of Layer and Film Thickness and Temperature on the Mechanical Property of Micro- and Nano-Layered PC/PMMA Films Subjected to Thermal Aging

Dark Field Raman Microscopy

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