Preparation of polyoxymethylene/methyl vinyl silicone rubber/thermoplastic polyurethane ternary thermoplastics vulcanizates with good toughness properties

Abstract

Novel thermoplastic vulcanizates (TPVs) based on polyoxymethylene (POM) and methyl vinyl silicone rubber (MVQ) have been prepared by dynamic vulcanization process through a batch mixer. During the preparation of TPV blends, Di-(tert butyl peroxyisopropyl) benzene (BIBP) was used as the curing agent in order to make MVQ cross-linked and TPU was used to coat MVQ for improving the compatibility of MVQ and POM. In order to understand the influence of different compositions on TPV blends, five groups of experimental processes were described in detail. During these experiments, the amount of POM was reduced from 70phr to 30phr, that of MVQ was gradually increased from 18phr to 42 phr, and TPU was increased from 12phr to 28phr. In addition, the morphology and properties of TPVs were studied by DSC, FTIR, SEM, DMA and mechanical tests. The mechanical testing results showed that with the amount of POM decreasing and the total amount of MVQ and TPU increasing, the tensile strength of the TPV blends gradually was decreased, and the elongation at break was increased accordingly from 35.2 ± 6% of pure POM to 142.8 ± 11% of sample 5#.

Effects of thickness, fibre orientation and fabric textile on the low-velocity impact performances of thermoset and thermoplastic composites

“…1 Due to their distinctive properties, these materials are generally used as a matrix in the composites depending on the desired requirements. [2][3][4][5][6][7][8][9][10][11] For instance, Ma et al 2 performed tensile and endnotched flexure tests to examine the failure behaviour and mechanical properties of the thermoset and thermoplastic composites. As a result, the damage was observed in the interfacial fracture mode for the thermoplastic composites with the weak interface but high Mode II interlaminar fracture toughness.…”

Synergetic impacts of two rigid nano‐scale inclusions on the mechanical and thermal performance of POM/carbon black/CaCO3 ternary nanocomposite systems

“…[7,8] The toughening of POM by incorporating elastomers was reported in many studies. [9][10][11][12] Pan et al [13] reported a 250% and 334% increase in impact resistance and tensile strain of POM/ABS (80/20), as compared to neat POM. The tensile strength was, however, decreased about 40% with ABS inclusion.…”

Evaluation of crystallinity, thermal, mechanical and morphological features of high density polyethylene composites reinforced with crosslinked semifluorinated acrylate polymer microspheres

“…Namely, the substituting of fluorine provides to improving in the thermal stability by reducing flammability, decreasing of the surface energy and friction coefficient as well as increasing the electrical and optical features. 14 However, the compatibility level between the components, which is the main factor affecting directly the properties (especially mechanical) of the matrix, 15,16 becomes relatively lower in the composites including the fluoropolymers when compared to the others. In order to get rid of such adhesion problem, the polymer filler obtained from the fluoroalkyl acrylates (FAs) can be used in the composites.…”