Transmission properties of hollow glass fibers for the infrared fabricated by glass-drawing technique

Correlation of fatigue behavior and dynamic mechanical properties of hybrid composites of polypropylene/short glass fibers/hollow glass beads

Journal of Thermoplastic Composite Materials ◽

10.1177/0892705721993190 ◽

2021 ◽

pp. 089270572199319

Author(s):

Gustavo B Carvalho

Keyword(s):

Stress Relaxation ◽

Flexural Strength ◽

Relaxation Rate ◽

Hybrid Composites ◽

Fatigue Behavior ◽

Glass Fibers ◽

Glass Beads ◽

Hollow Glass ◽

Dynamic Mechanical ◽

Short Glass

Ternary hybrid composites of Polypropylene (PP)/Short Glass Fibers (GF)/Hollow Glass Beads (HGB) were prepared using untreated and aminosilane-treated HGB, compatibilized with maleated-PP, and with varying total and relative GF/HGB contents. Static/short-term flexural strength properties data revealed, through lower flexural strength values, that the presence of untreated HGB particles induces to fiber-polymer interfacial decoupling at much higher extent than in the presence of aminosilane-treated HGB particles. This phenomenon is also evident when evaluating the data from displacement-controlled three-point bending fatigue tests. Monitored up to 106 cycles, the analyzed hybrid composites presented distinct performance relative to their fatigue stress relaxation rate: the lower the matrix-reinforcements’ interfacial adhesion, more pronounced the stress relaxation rate as a function of the number of fatigue cycles. Dynamic Mechanical Thermal Analysis (DMTA) results could successfully reveal the hybrid composites behavior at the microstructural level when they were submitted to both static flexural test and fatigue, depending on the degree of interfacial interactions between the polymer matrix of PP and the hybrid reinforcements of GF and HGB (with and without aminosilane surface treatment).

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Characterization of a Y-Coupler and Its Impact on the Performance of Plastic Optical Fiber Links

Fibers ◽

10.3390/fib6040096 ◽

2018 ◽

Vol 6 (4) ◽

pp. 96 ◽

Cited By ~ 1

Author(s):

Alicia López ◽

M. Losada ◽

Javier Mateo ◽

N. Antoniades ◽

Xin Jiang ◽

...

Keyword(s):

Optical Fibers ◽

Power Distribution ◽

Glass Fibers ◽

Single Mode ◽

Transmission Properties ◽

Modal Power ◽

Custom Made ◽

Plastic Optical Fibers ◽

The Impact

Couplers and splitters are common devices in single-mode and multi-mode glass fibers applications, where they perform a variety of functions. However, when switching to plastic optical fibers (POFs), there is a shortage of commercial devices, which are usually custom-made. The problem with these devices is that modal power distribution in POFs is easily modified by spatial disturbances that produce a localized strong power transfer between modes, thus changing their transmission properties. In this work, a commercial Y-coupler designed for POFs is experimentally characterized. Measurements of its spectral, spatial and temporal characteristics have been performed, including insertion loss as a function of wavelength, angular power distribution, and frequency response. The obtained results show that this device has an equalizing effect over the power spatial distribution that reduces the fiber bandwidth, demonstrating the importance of considering the impact of this type of devices on the transmission properties of any POF system.

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