Characterization study of flax/strontium titanate/polypropylene composite for low‐k dielectric applications

Abstract

This study demonstrates the characterization of flax fiber reinforced polypropylene-strontium titanate composite and dielectric study for low-k dielectric applications. The composite was studied through thermal, morphological, and compositional aspects. Thermogravimetry analysis, differential scanning calorimetry shows a higher thermal stability with low glass transition temperatures and lowered decomposition temperatures of 375 C. The morphological study on the surface of this composites had revealed closely packed layers of fiber, ceramic and polymer matrix, which deduces the increased dielectric constants between 3.92 and 4.25 after the addition of strontium titanate. The dielectric constant was found to be significantly higher with a 78% increase with strontium titanate inclusion at relaxation frequencies between 1 kHz and 2 MHz, respectively. Besides, the dielectric property data showed that dielectric permittivity of 4.2 (low k) with the inclusion of natural fibers and ceramic at higher frequencies and lowered corresponding dielectric losses. The infrared spectroscopy results also show a reduction in hydroxyl groups and confirms the presence of bonds that are subjected to high interfacial bonding.

Preparation of a low dielectric POSS/epoxy hybrid polymer without sacrificing the mechanical performance

“…Nevertheless, the mechanical properties are greatly decreased due to the inferior compatibility between the epoxy resins and fillers. [8][9][10] (ii) The introduction of air bubbles with ultra-low D k can reduce the D k of materials. However, the existence of pores ranging from 10 to 100 mm will decrease the mechanical properties of the matrix.…”

Effect of the Alumina Particle Filler Structure and Particle Size on the Dielectric Constant and Dielectric Loss in the Millimeter-Wave Band

“…However, ceramic materials are not flexible and are used as substrate materials in ceramic leadless chip carriers (LCCs) , that have a relatively low relative permittivity and a high dielectric constant because they are composed of materials with larger molecular weights than that of polymers. Thus, numerous polymer–ceramic composites have been considered. − Recently, glass–ceramics such as indialite and cordierite, H 3 BO 3 , ErNbO 4 , and Li 3 AlB 2 O 6 have successfully reduced the relative permittivity of ceramics to 2–4, which is challenging for ceramics. Ceramics have a relatively high degree of freedom owing to their compositional and structural diversity of elements compared with that in polymeric materials.…”