Comparison in composite performance after thermooxidative aging of injection molded polyamide 6 with glass fiber, talc, and a sustainable biocarbon filler

Abstract

Degradation is an unavoidable part of a material's life making it important to both monitor and control the aging behavior of plastics. This study compares thermooxidative degraded composites of a novel bio-based and sustainable filler, Biocarbon (MBc), against that of traditional and commercially available fillers (glass fiber and talc) used in the automotive industry. The influence of thermooxidative degradation on the composites was studied under accelerated heat aging for 1000 h at 140 C. The mechanical properties of the composites were evaluated using notched Izod impact as well as both tensile and flexural tests. Morphological structure of the composites was investigated using a scanning electron microscopy. Dynamic mechanical analysis and differential scanning calorimetry were used to evaluate the physical transitions both before and after aging. The glass-filled composites displayed the best performance; while, both the talc and biocarbon composites possessed similar strength and ductility performances. Advantageously, the biocarbon composites experienced an 11% reduction in density as compared to talc-filled composites with similar weight content. After aging, all composites exhibited reduced tensile and flexural strengths ranging from 5 to 67% partly due to chain scission. Whereas, the modulus of all composites increased with a range of 1-24% due to an annealing effect.

Performance of nylon 6 composites reinforced with modified agave fiber: Structural, morphological, and mechanical features

“…These data analysis showed that as AF concentration increased, the intensity of the two peaks also rose, which suggested that agave fiber induces the formation of α crystals of Ny6, as is shown by XRD. The addition of agave fiber in Ny6 improved the crystallinity degree (% X c) up to 22.4% for Ny6‐AF 20% (Table 3), which is likely attributed to chain restriction motions as explained by Jubinville et al 54 for fiber‐shaped loads‐reinforced polyamide 6 composites. The discrepancy of the % X c value for Ny6‐AF composite with 15 wt% of AF is attributed to a low dispersion of the fiber into the matrix during the melt mixing process, resulting in areas with low amounts of fiber.…”

New insight into the thermal‐oxidative stability of polyamide 6: A comparison investigation on the effect of hindered amine and CuI/KI

“…Jubinville et al also found that different additives have a nucleation effect on PA6. [ 29 ] Within the range of aging time, we can find that X c and T m increase slightly under the low aging temperature, while those increase initially followed by a decrease under the high aging temperature. On one hand, the rise of X c and T m is due to the chemicrystallization that occurred as a result of scissor of molecular segments, which can yield mobile molecular chains in the amorphous region suitable to incorporate into pre‐existing crystals.…”

Studies on 3D Printability of Novel Impact Modified Nylon 6: Experimental Investigations and Performance Evaluation

“…However, the HDT value of injection molded pristine nylon 6 was observed in the range of 138–147 °C based on available grades. [ 32,49 ] This formulation may be suitable for printing patient specific prosthetic sockets. As the prepared prosthetics mostly used closer to environmental conditions (0–30 °C).…”