Effect of trisilanolphenyl‐POSS on rheological, mechanical, and flame‐retardant properties of poly(ethylene terephthalate)/cyclotriphosphazene systems

Abstract

Poly(ethylene terephthalate) (PET) chips were coated by trisilanolphenyl–polyhedral oligomeric silsesquioxane (T‐POSS) and hexakis (para‐allyloxyphenoxy) cyclotriphosphazene (PACP) using the predispersed solution method, and PET/PACP/T‐POSS hybrids were further prepared by the melt‐blending method. The influence of T‐POSS on the rheological, thermal, and mechanical properties and flame retardancy of PET/PACP composites were discussed. The results suggest that T‐POSS was homogeneously dispersed in the PET matrix, which reduced the negative effects on polymer rheology and mechanical properties. For the PET/4%PACP/1%T‐POSS sample, the tensile strength at break and Tg increased from 29.67 MPa and 81.7 °C (PET/5%PACP) to 34.8 MPa and 85.8 °C, respectively, but the sample also self‐extinguished within 2 s, and the heat release capacity was reduced by 27.9% in comparison with that of neat PET.© 2017 Wiley Periodicals, Inc. J. Appl. Polym. Sci. 2018, 135, 45912.

Effect of aluminum diisobutyl hypophosphate in polyethylene terephthalate and its flame retardant mechanism

“…The melting droplets were reduced obviously and the dripping no longer ignited the cotton, leading to V‐0 level in UL‐94. This may be assigned to the retarding effect of APBA on the melt flow of PET matrix, which could be verified by the rheological analysis in section 3.5 20 . Further increasing the APBA content, the LOI value of PET/APBA17.5% increased by 65.4% compared to neat PET, and V‐0 level remained.…”

“…This may be assigned to the retarding effect of APBA on the melt flow of PET matrix, which could be verified by the rheological analysis in section 3.5. 20 Further increasing the APBA content, the LOI value of PET/APBA17.5% increased by 65.4% compared to neat PET, and V-0 level remained. From the digital images after LOI and UL-94 tests (Figure 1), char layers appeared on the PET/APBA composite surface, which played a role of isolation and protection on matrix surface.…”

Polysiloxanes Grafted with Mono(alkenyl)Silsesquioxanes—Particular Concept for Their Connection

“…The most significant branch of SQs successful application is material chemistry as nanofillers and polymers modifiers [65][66][67][68][69][70][71]. Depending on the type of applied silsesquioxane and its amount in a polymer matrix, the resulting nanocomposite material possesses improved properties, i.e., mechanical (increased elongation at break, lower friction), optical (maintained optical transparency, reduced or removed the color of the nanocomposite), thermal (increased thermal resistance and glass transition temperature, lowered thermal conductivity), and others (e.g., improved the oxidation and corrosion resistance, reduced flammability of the material) [72][73][74][75][76][77][78][79][80][81][82][83][84][85][86]. There are a few possibilities to introduce silsesquioxane molecules into the polymer matrix ( Figure 1).…”

Preparation of Tri(alkenyl)functional Open-Cage Silsesquioxanes as Specific Polymer Modifiers

“…Multi-functional SQs may additionally offer the possibility to obtain three-dimensional (3D) copolymeric networks, leading to substantial improvement in their physicochemical properties, i.e., increased thermal and oxidation resistance, mechanical properties, e.g., hardness, as well as the reduction of flammability, heat evolution, viscosity during processing, etc. [35][36][37][38][39][40][41][42][43][44][45][46][47].…”