A new potential polymeric cladding material for polycarbonate fibre optic core for high temperature use

Moslan, Mohd Shahrizan; Othman, Mohd Hafiz Dzarfan; Samavati, Alireza; Salim, Mohd. Razman; Rahman, Mukhlis A.; Ismail, Ahmad Fauzi; Bakhtiar, Hazri; Sokri, Mohd Nazri Mohd

doi:10.1016/j.yofte.2021.102723

Cited by 5 publications

(4 citation statements)

References 40 publications

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“…The additives can affect the crystallinity and amorphous phase of the polymer matrix and further have an influence on the transparency. , The XRD diffraction patterns of PC and SK revealed that both PC and SK were amorphous polymers with no crystalline signal (Figure S2). The DSC result showed that there was no melting peak after the addition of SK (Figure S3), so the SK did not change the amorphous characteristic of PC.…”

Section: Resultsmentioning

confidence: 99%

“…Incorporation of polymeric additives has been considered as an effective approach to enhance polymers’ overall properties. − Moslan et al have proposed a cladding material, which is a blend of polycarbonate and poly(methyl methacrylate) (PC/PMMA). The blended material exhibited higher thermal stability with an onset decomposition temperature of about 300 °C and good optical properties.…”

Section: Introductionmentioning

confidence: 99%

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Sulfonate-Group-Containing Polymeric Polyamide for Simultaneous Transparency and Flame Retardancy of Polycarbonate

Chen

Zhao

et al. 2023

ACS Appl. Polym. Mater.

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In the functionalization of transparent polycarbonate (PC), the addition of additives often results in damage to the transparency of polycarbonate, thereby limiting its application in the field with a high transparent requirement. In this study, sulfonate-group-containing polymeric polyamide SK was synthesized and employed as a functional agent for PC. The results demonstrated that the SK significantly improved the fire safety of PC. 1.0 wt % SK endowed PC with a UL-94 V-0 rating and a limiting oxygen index of 30.4%; compared with that of neat PC, the maximum smoke density (Dsmax) and the peak of heat release rate (PHRR) for 1.0 wt % SK-blended PC were decreased by 21% and 39%, respectively. More importantly, the transparency of the original PC was maintained at 86.4% after incorporation of 1.0 wt % SK, showing only a slight reduction. Here, excellent flame retardancy is ascribed to the synergistic effect of SK-caused physical cross-linking and carbonization. While, high transparency is attributed to the amorphous nature of SK and its good compatibility with PC. This work demonstrates that SK is an efficient polymeric functional agent for fabricating transparent and flame-retardant PC and provides another idea for designing a sulfonate-group-containing flame retardant differing from traditional sulfonates for PC.

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Section: Resultsmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Sulfonate-Group-Containing Polymeric Polyamide for Simultaneous Transparency and Flame Retardancy of Polycarbonate

Chen

Zhao

et al. 2023

ACS Appl. Polym. Mater.

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“…En este sentido, la demanda de materiales poliméricos que cubran las necesidades de estos productos se ha incrementado exponencialmente, debido a su versatilidad y al creciente uso para instalaciones domésticas. Sin embargo, la velocidad de transmisión de datos de las POFs todavía presenta desafíos, ya que no alcanza la de las fibras de SiO 2 [17][18][19]. Una consideración importante en la composición de las POFs es que el núcleo, debe tener un IR más alto que la capa inmediata que lo reviste.…”

Section: B Indice De Refraccionunclassified

Improving predictive modeling of polymeric materials using a hybrid approach of machine learning and expert intervention

Cravero¹,

Ponzoni²,

Díaz³

2023

Proceedings of the 21th LACCEI International Multi-Conference for Engineering, Education and Technology (LACCEI 2023): “Leaders

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This work describes a hybrid methodology that combines machine learning and expert intervention to improve the predictive modeling of high-interest properties of polymeric materials. Although these materials have many advantages, developing a new material with specific properties, from a new molecular structure, is a great challenge and a costly and time-consuming task. The demand for materials with very specific properties continues to grow, so machine learning techniques have been applied for the prediction of these properties. The hybrid methodology was developed in an evolutionary way from expert intervention at the end of the machine learning process to a more determinative intervention throughout the cycle. This allows for more robust and reliable models for the design of new materials, which can help designers obtain property profiles for prototypes prior to the synthesis stage, saving time and resources.

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“…Two major elements facilitate this: the cladding layer must have a lower refractive index than the core (<). Then, the total reflection condition is fulfilled, and the light is “trapped” inside the waveguide [ 6 , 7 ]. A cladding layer can also act as a mechanical protection layer for the optical interface of the core.…”

Section: Introductionmentioning

confidence: 99%

Influence of Injection Molding Parameters on the Peel Strength between Plasma-Treated Fluoropolymer Films and Polycarbonate

et al. 2023

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Light guiding is used to direct light from an emitting source to a different location. It is frequently realized through a clad–core structure with a difference in the refractive index of the materials. This paper explores the possibility of combining a fluoropolymer (THV) film of low refractive index, serving as a cladding layer, with a polycarbonate (PC) core, via injection molding. Pristine THV lacks adherence to the PC. However, when treated with O2 plasma prior to overmolding, bonding can be established that was quantified in peel tests. The effect of this surface treatment was further investigated by adjusting the plasma treatment duration and time to overmolding. Furthermore, parameter studies comprising the four molding parameters, namely packing pressure, injection speed, melt temperature, and mold temperature, were performed. Numerical injection molding simulations assessed the prevailing temperatures at the PC–THV boundary. Consequently, the temperature–time integral could be calculated and linked with the measured peel strengths by fitting a proportionality constant. While the plasma treatment duration showed minor influence, the activation diminished with time, halving the measured peel loads within 24 h. The adhesion was experimentally found to increase with a lower packing pressure, faster injection speed, and higher melt and mold temperature. Those same molding relations influencing the peel loads were also found with the temperature–time integral when scaled by the proportionality constant in the simulations (R2=85%). Apparently, adhesion is added by molding settings which promote higher interface temperatures that prevail for longer. Hereby, the faster injection speed increases the melt temperature through shear heating. A higher packing pressure, in contrast, presumably increases the heat transfer at the PC–THV interface, accelerating the cooling. The measured peel loads were 0.3–1.6 N/mm for plasma-treated samples and nearly zero for pristine THV.

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A new potential polymeric cladding material for polycarbonate fibre optic core for high temperature use

Cited by 5 publications

References 40 publications

Sulfonate-Group-Containing Polymeric Polyamide for Simultaneous Transparency and Flame Retardancy of Polycarbonate

Sulfonate-Group-Containing Polymeric Polyamide for Simultaneous Transparency and Flame Retardancy of Polycarbonate

Improving predictive modeling of polymeric materials using a hybrid approach of machine learning and expert intervention

Influence of Injection Molding Parameters on the Peel Strength between Plasma-Treated Fluoropolymer Films and Polycarbonate

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