Abstract
Small amounts of glycidylisobutyl polyhedral oligomericsilsesquioxane (G-POSS) (up to 10 phr) were added into a immiscible polyamide12 (PA12)/polyolefin elastomer (POE) blend (70 wt%/30 wt%) by simple melt mixing. The effects of the G-POSS on phase morphology and mechanical properties were investigated by FE-SEM, tensile testing, Izod impact test and dynamic mechanical analysis. FE-SEM analysis revealed that domain size of the dispersed POE phase in matrix PA12 is decreased significantly by adding the G-POSS, indicating a compatibilization effect of the G-POSS for the immiscible PA12/POE blend. The PA12/POE blend compatibilized with POSS showed simultaneous enhancement in mechanical properties including tensile modulus, strength and toughness. Further, thermally triggered shape memory effect was observed in this compatibilized blend.
Highlights
Polymer blending is an efficient and simple way to develop new polymeric materials possessing desirable physical properties and specific functionalities for various end-use applications
It can be seen that all blends have phase-separated morphologies, in which polyolefin elastomer (POE) forms dispersed domain in PA12 matrix, and the dispersed domain size decreased with addition of a small amount of polyhedral oligomeric silsesquioxane (POSS)
It can be seen that the domain size decreased from 34 μm for unfilled blend to about 10 μm for the blend with 5 phr POSS, and a slow but gradual decrease was observed with further increasing amount of the POSS
Summary
Polymer blending is an efficient and simple way to develop new polymeric materials possessing desirable physical properties and specific functionalities for various end-use applications. Materials 2021, 14, 27 thermoplastics such as polyolefins [17,18,19], polyamides [20,21,22] and others [23,24,25] by melt of 9 blending using conventional high-shear mixer and induced improved thermal stability and mechanical properties of the matrix polymer. As compared to the POSS nanocomposites with a single polymer matrix, relatively less studies on those with immiscible polyblending using conventional high-shear mixer and induced improved thermal stability and mer blends have been reported [13,26,27]. Polyamide (PA12) is one of the important engineering plastics with a broad range with a single polymer matrix, relatively less studies on those with immiscible polymer of applications including oil resistant tubes for automotive, cables, food packaging films blends have been reported [13,26,27]. A thermally-triggered shape memory effect of this blend is reported
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