Study of the effect of processing conditions on the co‐injection of PBS/PBAT and PTT/PBT blends for parts with increased bio‐content

Abstract

This work studies the effect of processing parameters on mechanical properties and material distribution of co-injected polymer blends within a complex mold shape. A partially bio-sourced blend of poly(butylene terephthalate) and poly(trimethylene terephthalate) PTT/PBT was used for the core, with a tough biodegradable blend of poly (butylene succinate) and poly (butylene adipate-co-terephthalate) PBS/PBAT for the skin. A 1 =2 factorial design of experiments is used to identify significant processing parameters from skin and core melt temperatures, injection speed and pressure, and mold temperature. Interactions between the processing effects are considered, and the resulting statistical data produced accurate linear models indicating that the co-injection of the two blends can be controlled. Impact strength of the normally brittle PTT/PBT blend is shown to increase significantly with co-injection and variations in core to skin volume ratios to have a determining role in the overall impact strength. Scanning electron microscope images were taken of co-injected tensile samples with the PBS/PBAT skin dissolved displaying variations of mechanical interlocking occurring between the two blends.

Review on PCL, PBS, and PCL/PBS blends containing carbon nanotubes

“…PCL was blended with various other biodegradable polymers in a number of studies [12][13][14][15][16][17][18][19][20][21][22]. Amongst various biodegradable polymers, PBS was the most interesting aliphatic polyester due to its relatively good melt processability, thermal and chemical resistance, biodegradability, and excellent mechanical properties, closely comparable to those of the widely-used polyethylene (PE) and polypropylene (PP) [4,5,[15][16][17][18][19][20][21][23][24][25][26][27][28][29][30][31][32][33][34][35][36]. Double crystalline PCL/PBS blends are particularly interesting because each component has an influence on the crystallization behaviour of the other component.…”

Copper sulfide nanoparticles: from synthesis to biomedical applications

“…This technique usually relies on a NIR laser to irradiate photothermal agents, which then convert the optical energy to heat energy and lead to thermal ablation of surrounded cells or tissues [50]. Many inorganic nanomaterials, such as gold nanostructures, CuS NPs, carbon nanomaterials, copper chalcogenide semiconductors, Pd nanosheets, Bi2Se3 nanoplates and W18O49 nanowires, are widely explored as photothermal agents.…”

Analysis and evaluation of biobased polyester of PTT/PBAT blend: thermal, dynamic mechanical, interfacial bonding, and morphological properties

“…Mechanical properties of PTT/PBT and PBS/PBAT blends are studied, and its enhancement of properties is observed as a function of various processing parameters (melt temperatures, injection speed, pressure, and mould temperature). [18] The present investigation aims to produce the biobased blend with improved stiffness and toughness. PTT/PBAT blend has been prepared with different weight ratios (100:0, 80:20, 60: 40, 40:60 20:80, and 0:100) by melt blending technique.…”