Preparation and Characteristics of Expandable Graphite with Sodium Tripolyphosphate Assistant Intercalation

Zhai, Zhi-Xiao; Pang, Xiu-Yan; Lin, Ruinian; Sun, Suyan; Weng, Meng-Qi

doi:10.14233/ajchem.2015.18340

Cited by 3 publications

(1 citation statement)

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“…Sodium tripolyphosphate (STPP) is a phosphate binder used in refractory materials . We found that the EG prepared with H 2 SO 4 as main intercalator and STPP as assistant intercalator shows improved dilatability and reduced suffer content . In view of the influence of GIC size on flame retardancy and effect of modification on EG expansion performance, we further prepared three different sizes of STPP‐modified EG (EG P ), which were marked as EG P50 , EG P80 , and EG P100 , respectively.…”

Section: Introductionmentioning

confidence: 99%

Effect of different size‐modified expandable graphite and ammonium polyphosphate on the flame retardancy, thermal stability, physical, and mechanical properties of rigid polyurethane foam

Pang

Xin

Shi

et al. 2019

Polymer Engineering & Sci

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In this study, three different sizes of tripolyphosphate‐modified expandable graphite (EGp) are prepared and incorporated into rigid polyurethane foam (RPUF) in order to obtain a flame retardant material with low density, good mechanical properties, and hydrophobicity. The influence of particle size on material combustibility, thermal stability, compression strength, pore cell structure, diathermancy, and hydrophobic property is investigated. Synergistic effect between the EGp and ammonium polyphosphate (APP II) is also examined. Results show the limiting oxygen index value and residue yield increase as the EGp size increases. On the contrary, the heat release rate and total heat release decrease as the EGP size increases. In addition, the chemical char formation effect of APP on RPUF is more important than the char formation of the graphite intercalation compounds. EGp and APP show synergistic effect in improving flame retardancy, thermal stability, and hydrophobicity. POLYM. ENG. SCI., 59:1381–1394 2019. © 2019 Society of Plastics Engineers

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Section: Introductionmentioning

confidence: 99%