Synthesis of A Novel Cyclotriphosphazene and Its Enhancement of Anti‐aging and Flame Retardancy of Polyolefin

Abstract

A novel cyclotriphosphazene polymer (PDP) was synthesized by one-step method with hexachlorocyclotriphosphazene (HCCP) and 4,4'-biphenol (DOD) as raw materials. The effects of different reaction time and molar ratio of reactants on PDP yield and molecular weight were investigated. The results showed that when the reaction time reached 60 min, the yield and the molecular weight of PDP was the highest. The yield of PDP decreased with the increase of the molar ratio of HCCP to DOD, when the ratio of HCCP to DOD was 3 : 3, the molecular weight of PDP reached the maximum. The characterization results of FTIR and XPS showed that the method can effectively prepared PDP. XRD result showed that the PDP was noncrystalline polymer. The synthesized PDP was applied to the polyolefin cable materials by electron beam radiation crosslinking method. The results of aging experiments showed that the limiting oxygen index (LOI) of the samples increased from 20% to 21.6% with the addition of 5phr PDP. As for the sample without PDP, the elongation at break was reduced to almost 0 in 12 h and tensile strength to 0 in 25 h. However, the elongation of the sample with 5phr PDP still kept 30% in 100 h, and the tensile strength kept 90% in 100 h. It shows that PDP has good flame retardancy and excellent anti-aging properties.

Spiro-cyclotriphosphazene with three functional end groups: synthesis and structure characterization of new polycyclotriphosphazenes with Schiff-base groups

“…Słowa kluczowe: spirocyklotrifosfazen, policyklofosfazen, poli(zasada Schiffa), stabilność termiczna, ognioodporność. 1) Department of Chemistry, College of Science, Mustansiriyah University, Baghdad, 10052, IRAQ. 2) Polymer research unit, College of Science, Mustansiriyah University, Baghdad, 10052, IRAQ.…”

“…Inclusion adducts, star-shaped, hyperbranched, and dendrimer are the most interesting and promising molecules in cyclophosphazene chemistry. These molecules are generally derived from oragnocyclotriphosphazenes which are commonly prepared via condensation reaction of HCP with varied substituents in different molar ratios afforded mono -to hexa -substituted organocyclotriphosphazenes [1][2][3][4][5]. Spiro(o-phenyenedioxy)cyclotriphosphazenes are another interesting derivatives of organocyclotriphosphazene [6].…”

Improving the curing and flame retardancy of epoxy resin composites by multifunctional Si-containing cyclophosphazene derivatives

“…Therefore, hexachlorocyclotriphosphazene (HCCP) has gradually attracted people's attention because of its strong ame retardancy and high reactivity. [12][13][14][15][16] The molecular structure of HCCP contains Cl, P and N elements simultaneously, which can form a P-N synergistic ame retardant system resulting in excellent ame retardant properties. Therefore, HCCP can be used in re retardant materials and self extinguishing materials.…”

“…Therefore, HCCP can be used in re retardant materials and self extinguishing materials. [12][13][14] However, HCCP used as a ame retardant directly is prone to secondary pollution due to HCl produced by combustion. Functionalization HCCP can be easily obtained by nucleophilic substitution of Cl atoms bonded to phosphorus with a nucleophile including amine, alcohol, or water.…”

“…15,16 For example, Huang and et al prepared a novel anti-aging ame retardant through the nucleophilic substitution reaction of 4,4 0 -biphenol and HCCP. 14 Ning et al Synthesized a new cyclotriphosphazene derivative with high ame retardant efficiency and smoke suppression performance by using a thiazole with simple chemical structure to react with cyclotriphosphazene. 15 In addition, the application range of EP resin is limited due to the increased brittleness and reduced toughness caused by the extensive use of curing agent.…”