Application of the PAPP/MCA/APP intumescent flame retardant system in polypropylene

Abstract

Ammonium polyphosphate (APP), piperazine pyrophosphate (PAPP), and melamine cyanurate (MCA) were used as raw materials to develop an intumescent flame retardant system (IFRS) for polypropylene (PP). The synergistic flame retardancy among APP, PAPP, and MCA was explored. The effect of the proportion of APP, PAPP, and MCA on the IFRS flame‐retardant performance was studied. For the range of samples tested, the IFRS with the proportion of PAPP, MCA, and APP at 4:1:7.5 showed the best flame retardancy. When the addition of PAPP/MCA/APP IFRS in PP was 20%, the prepared flame‐retardant PP composite (PP‐PMA‐3) passed UL‐94 V‐0 rating. Moreover, the PP‐PMA‐3 total heat release (THR) decreased by 46.4% compared with PP‐0. Meanwhile, PAPP/MCA/APP IFRS showed good smoke suppression performance because the total smoke production (TSP) of PP‐PMA‐3 decreased by 65.0% compared with PP‐0. In addition, the high flame retardancy and the flame‐retardant mechanism of the prepared IFRS was explained.

Selective Adsorption of Methyl Orange and Methylene Blue by Porous Carbon Material Prepared From Potassium Citrate

“…With the mushroom growth of the printing and dyeing industry, the use of dyes is becoming more and more extensive because dyes can give materials such as fiber and leather beautiful colors and give people a good visual effect. , The development of the printing and dyeing industry leads to the production of a large amount of wastewater. , The discharge of wastewater containing organic pollutants, which contain a high concentration of dyes, is one of the reasons for water pollution. The existence of dyes in wastewater can not only destroy the environment but also lead to nasty damage to the organism and human body, which can cause the deterioration of the ecosystem and hinder the sustainable development of human society. , Since people have realized the importance of environmental safety, it is necessary to explore an efficient, low-cost, and pollution-free measure to remove dyes from wastewater. , …”

“… 5 , 6 Since people have realized the importance of environmental safety, it is necessary to explore an efficient, low-cost, and pollution-free measure to remove dyes from wastewater. 7 , 8 …”

Recent Progress in Polymer Waste‐Derived Porous Carbon for Supercapacitors

“…[29] Polymer materials are among the most common materials widely used in our daily life. [30][31][32][33] Various polymer materials, including polyethylene (PE), polypropylene (PP), polyethylene terephthalate (PET), polystyrene (PS), polyvinyl chloride (PVC), polyurethane (PU), polyimide (PI), poly (lactic acid) (PLA), polycarbonate (PC), acrylonitrile-butadiene-styrene copolymer (ABS), etc. have been developed and produced (Figure 2).…”