Article
Polymer Science
Zhenhua Wang, Weili Feng, Jiachen Ban, Zheng Yang, Xiaomin Fang, Tao Ding, Baoying Liu, Junwei Zhao
Summary: In this study, sisal-fiber-reinforced polypropylene (PP/SF) flame-retardant composites were prepared using the two-step melt blending method. An intumescent flame retardant (IFR) composed of silane-coated ammonium polyphosphate (Si-APP) and pentaerythritol (PER) was used. The PP/SF composite prepared by PP/SF secondary blending with IFR showed excellent flame-retardant performance, with a limited oxygen index of about 28.3% and passing the UL-94 V-0 rating (3.2 mm) in the vertical combustion test. The mechanical properties of the composites prepared using three different mixing processes were similar.
Article
Materials Science, Multidisciplinary
Yiliang Sun, Jingwen Li, Hongfu Li
Summary: This study investigated the effect of adding flame retardant on the impregnation quality of prepreg tape. By adding high-flow polypropylene to improve the melt viscosity of flame-retardant-modified polypropylene, continuous glass-fiber-reinforced polypropylene flame-retardant prepreg tape was successfully prepared. The tests showed that adding 25 wt% intumescent flame retardant (IFR) achieved the best flame retardancy grade.
Article
Chemistry, Physical
Eugenio Gibertini, Federico Carosio, Kubra Aykanat, Alessandra Accogli, Gabriele Panzeri, Luca Magagnin
Summary: The study proposes a new method of encapsulating red phosphorus particles with a silica shell for flame retardancy in textiles. Through sol-gel process, a uniform silica shell was successfully achieved, improving the thermal stability of red phosphorus.
SURFACES AND INTERFACES
(2021)
Article
Polymer Science
Jinwoo Lee, Jae Hyung Park, Seung Bo Shim, Ji Eun Lee
Summary: This study investigated the flame retardancy and mechanical properties of polypropylene-based flame retardant composites by mixing surface-modified magnesium hydroxide with phosphorus-based flame retardants. The results showed a relationship between the amount of modified flame retardant added and the degradation of mechanical performance, with a greater effect on the bending strength reduction.
Article
Engineering, Manufacturing
Wenjing Zhao, Chanchal Kumar Kundu, Zhiwei Li, Xiaohong Li, Zhijun Zhang
Summary: This article reviews the flame retarding strategies used in polypropylene matrices, including flame-retardant compounds, application methods, and flame-inhibition mechanism, highlighting the researchers' efforts in improving the fire performance of PP.
COMPOSITES PART A-APPLIED SCIENCE AND MANUFACTURING
(2021)
Article
Polymer Science
Qibin Xu, Lei Wu, Xiang Yan, Shengchang Zhang, Linan Dong, Zexi Su, Tianhaoyue Zhong, Chunhui Jiang, Yuan Chen, Mengjin Jiang, Pengqing Liu
Summary: In this study, a novel intumescent flame retardant Dohor-6000A was used to prepare halogen-free flame retardant PP fibers, with a surface modification to enhance compatibility with the PP resin. The addition of IFR did not damage the crystal structure or orientation of the PP matrix, helping maintain mechanical properties. The presence of IFR significantly improved flame retardant performance and thermal stability of PP fibers, with a LOI value of 29.1% and reduced heat release rates in comparison to pure PP fibers.
Article
Thermodynamics
Wei Yang, Xiang Dong, Shi-bin Nie, Ji-nian Yang, Xiang-feng Zhang, Xue-qiang Wu, Cheng-ye Fang, Hai-lin Su
Summary: Efficient and hydrophobic modificated ammonium polyphosphate (M-APP) and charring agent (M-CA) were prepared using sol-gel method for the preparation of water-resistant and flame-retardant polypropylene (PP) composites. The results showed improved flame retardancy and reduced heat and smoke release in the PP composites. Additionally, the PP composite with M-APP/M-CA = 3:1 exhibited excellent water resistance even after soaking in 70 degrees water for 168 hours.
JOURNAL OF THERMAL ANALYSIS AND CALORIMETRY
(2022)
Article
Polymer Science
Qianqian Niu, Xiaopeng Yue, Zhenghong Guo, Hongqiang Yan, Zhengping Fang, Juan Li
Summary: Interfacial interactions play a crucial role in fiber reinforced composites. Coating bamboo fibers with a phosphorus-silicon hybrid aerogel enhances the flame retardancy and mechanical properties of poly(lactic acid) (PLA) composites.
Article
Agricultural Engineering
Patrycja Bazan, Kamila Salasi, Stanislaw Kuciel
Summary: The research demonstrates that the use of natural fibers in flame retardant polypropylene composites significantly improves strength and stiffness, while slowing down the heat release process during combustion. Therefore, composites with natural additives have the potential to become construction materials.
INDUSTRIAL CROPS AND PRODUCTS
(2021)
Article
Chemistry, Physical
Na Wang, Shaopeng Chen, Lingtong Li, Zhuyu Bai, Jianbing Guo, Jun Qin, Xiaolang Chen, Rui Zhao, Kun Zhang, Hong Wu
Summary: An environmentally friendly nanohybrid expandable graphite (nHEG) was successfully designed and synthesized for flame-retardant polypropylene (PP) composites, achieving UL-94 V0 rating. By introducing nano-SiO2 particles and expandable graphite, the enhanced flame retardancy was attributed to the formation of continuous and tight char residues.
JOURNAL OF PHYSICAL CHEMISTRY C
(2021)
Article
Materials Science, Composites
Dalong He, Xiang Liu, Fangkun Jiao
Summary: Composite materials reinforced with glass fiber (GF) and polyimide (PI) have a high demand in aerospace and industrial fields. The addition of GF into PI improves the hardness, compressive strength, impact strength, flexural strength, thermal stability, and flame retardant properties of the composites. These findings provide a viable solution for enhancing the performance of PI-based composites.
POLYMER COMPOSITES
(2023)
Article
Polymer Science
Shangkai Lu, Junbang Liu, Lijuan Zeng, Lianghui Ai, Ping Liu
Summary: The double-shell microcapsules (Mic-DP) of red phosphorus (RP) were prepared using melamine borate and crosslinked beta-cyclodextrin as shell materials, and their flame-retardant effect on polyamide 6 (PA6) was investigated. Mic-DP showed lower hygroscopicity and better inoxidizability compared to RP. The addition of Mic-DP decreased the thermal combustion rates of PA6. Py-GC-MS, SEM, and FT-IR analyses confirmed that Mic-DP acted as a flame retardant in both gas and condensed phases.
Article
Engineering, Manufacturing
Weiwei Zhang, Xin Zhang, Zhaolu Qin, Wenchao Zhang, Rongjie Yang
Summary: An interpenetrating polymer network (IPN) system, referred to as PMPP, has been designed through sequential optimization, showing higher flexural strength and improved heat resistance compared to traditional polymer networks. By incorporating fiberglass, the GF/PMPP composite material exhibits enhanced heat resistance and smoke suppression performance, making it suitable for electronic applications.
COMPOSITES PART A-APPLIED SCIENCE AND MANUFACTURING
(2021)
Article
Materials Science, Multidisciplinary
Yunfei Guo, Julian Kleemann, Rint P. Sijbesma, Zeljko Tomovic
Summary: Polyurethane (PU) is commonly used in various applications, and improving its thermal stability and flame retardancy is critical. This study successfully introduced polyisocyanurate (PIR) and phosphorus motifs into polyurethane through a co-trimerization reaction, resulting in high thermal stability and flame retardancy. The method has potential applications in rigid PU foams and compact thermosets.
ACS APPLIED POLYMER MATERIALS
(2023)
Article
Materials Science, Multidisciplinary
Xiaobing Ma, Han Yun, Ningjing Wu, Fukun Niu, Jihang Yu
Summary: In this study, an environmentally friendly and super efficient flame retardant PHEMAP was successfully synthesized and applied to PLA material, forming a flame retardant film with excellent performance. The film has high transparency and good flame retardant effect, and is expected to be widely used in the fields of mobile phones, automotive interiors, and 3D printing.
ACS APPLIED POLYMER MATERIALS
(2021)
