Article
Chemistry, Multidisciplinary
Y. Li, X. Chen, Q. Liu, J. Sun, H. Li, X. Gu, S. Jiang, S. Zhang
Summary: In this study, cross-functional additives were designed to enhance the flame retardancy and UV resistance of polypropylene composites. The use of coated ammonium polyphosphate and charring formation agent resulted in improved properties.
MATERIALS TODAY CHEMISTRY
(2022)
Article
Polymer Science
Youlin Qin, Mingchao Li, Tuankang Huang, Chunhui Shen, Shanjun Gao
Summary: In this study, a star-shaped flame retardant containing phosphorus and nitrogen was synthesized and combined with ammonium polyphosphate to form an intumescent flame-retardant system. The stable star-shaped structure and the synergistic effect between phosphorus and nitrogen enabled the formation of an insulating char layer on the surface of the polymer matrix. The flame retardancy and thermal stability of the composite were significantly improved compared to pure polymer.
POLYMER DEGRADATION AND STABILITY
(2022)
Article
Polymer Science
Tonghui Yang, Yanpeng Wu, Yongchang Cheng, Tao Huang, Bin Yu, Meifang Zhu, Hao Yu
Summary: A novel linear triazine-based charring agent ETDPCs was successfully synthesized and combined with fire-retardant to fabricate intumescent flame-retardant PP composites with improved flame retardancy and thermal stability.
POLYMER DEGRADATION AND STABILITY
(2022)
Article
Polymer Science
Yan Zhang, Fenglong Lin, Yincai Wu, Shenglong Wang, Ziteng Liu, Lijun Song
Summary: In this study, cerium based DOPO derivative (Ce@DDP) was synthesized by hydrothermal method and its effects on flame retardancy, thermal stability, and mechanical properties of intumescent flame retardant polypropylene (PP) were investigated. The results showed that when adding 17 wt% of intumescent flame retardants (IFR) and 1 wt% of Ce@DDP, the peak heat release rate (PHRR) and peak smoke production rate (PSPR) of the resulting PP composite were reduced by 62.0% and 42.3%, respectively. Furthermore, Ce@DDP significantly improved the thermal stability and char formation ability of PP/IFR.
JOURNAL OF APPLIED POLYMER SCIENCE
(2023)
Article
Agricultural Engineering
Yurou Xia, Weihong Chai, Yuhang Liu, Xinying Su, Chenchen Liao, Meihuan Gao, Yingge Li, Zaihang Zheng
Summary: A starch-based and expandable graphite flame retardant system has been developed to improve the efficiency of bio-based flame retardants in polypropylene. The system exhibits high flame retardancy and anti-dripping ability.
INDUSTRIAL CROPS AND PRODUCTS
(2022)
Article
Polymer Science
Li Dang, Zhihui Lv, Xin Liu
Summary: The addition of 1 phr of ZB in polypropylene composites effectively improves flame retardancy and slows down the burning rate, resulting in reduced smoke production. The formation of a compact and graphitized char residue by ZB hinders heat diffusion and oxygen transmission, suppressing the combustion mechanism in the gas phase.
JOURNAL OF APPLIED POLYMER SCIENCE
(2021)
Article
Engineering, Multidisciplinary
Lei He, Tao Chen, Ting Wang, Hai-Bo Zhao, Jing-Ni Deng, Ting-Ting Li, Zhi-Cheng Fu, Quanxiao Dong, Ming-Jun Chen
Summary: Cu-CHP is a novel copper-doped intumescent flame retardant that can rapidly expand and carbonize under high temperature to form dense char residue, exhibiting excellent charring capacity and strength. By using Cu-CHP, the fire resistance and flame retardancy of composite materials can be significantly improved.
COMPOSITES PART B-ENGINEERING
(2023)
Article
Green & Sustainable Science & Technology
Xingguo Wang, Wenjia Wang, Shuheng Wang, Yufan Yang, Hongfei Li, Jun Sun, Xiaoyu Gu, Sheng Zhang
Summary: A novel halogen-free self-intumescent polyelectrolyte was synthesized and used to improve the flame retardancy of PLA nonwovens, showing significant results with potential to produce cleaner commercialized flame-retardant materials.
JOURNAL OF CLEANER PRODUCTION
(2021)
Article
Polymer Science
Seung Hun Lee, Seul Gi Lee, Jun Seo Lee, Byung Chol Ma
Summary: Combinations of multiple inorganic fillers can enhance the flame retardancy of rigid polyurethane foam, improving thermal stability and fire resistance.
Article
Polymer Science
Weimiao Lu, Jiewang Ye, Lianghai Zhu, Zhenfu Jin, Yuji Matsumoto
Summary: This study investigated the flame retardancy and mechanism of lignosulfonate (LS) as a char forming agent in intumescent flame retardants (IFR) instead of pentaerythritol (PER) in rigid polyurethane (RPU) foams. The results showed that LS could effectively enhance the flame retardancy and thermal stability of RPU foams, forming a continuous and relatively compact char layer.
Article
Chemistry, Multidisciplinary
Merve Kahraman, Nilgun Kizilcan, Mehmet Ali Oral
Summary: In this study, the synergistic effect of mica mineral and IFR in enhancing the flame retardancy properties of PP was investigated, with different ratios of IFR and mica mineral added into PP to compose 30 wt% of the total mass of the polymeric compounds. The results from LOI, UL 94, and GWT tests indicated that mica added to PP/IFR compound has a synergistic flame retardancy effects with the IFR system, achieving V-0 rating (3.2 mm) in UL 94 flammability tests and passing GWT tests at 750 and 850 degrees C when the mica content was 6 wt%.
Article
Materials Science, Composites
Yaru Sun, Bin Yu, Yan Liu, Fan Bai, Junbo Yan, Jun Wang, Fenglei Huang, Shuo Gao
Summary: This study presents a special synthetic process to create charring-foaming agent nanosheet (2d-CFA) which enhances the carbonization ability and fire safety of polylactic acid (PLA) composite when combined with ammonium polyphosphate (APP) to form intumescent flame retardant (IFR).
COMPOSITES COMMUNICATIONS
(2023)
Article
Chemistry, Physical
Kang Yu, Yachao Wang, Mingrui Xu, Xinxin Xue, Jiangping Zhao
Summary: In this study, beta-cyclodextrin (β-CD) modified aliphatic waterborne polyurethane (AWP)-based coatings were synthesized via the sol-gel method. The effect of surface-modified ammonium polyphosphate (APP) using β-CD and KR-238S on the flame retardancy of AWP-based coatings was investigated. The addition of 2 wt% β-CD enhanced the flame retardancy of AWP-based coatings, as indicated by an increase in the flame retardancy index (FRI) and a decrease in the peak of heat release rate (p-HRR). The modified APP improved the resilience and compatibility of the coatings. The synthesized coatings provide a non-toxic and cleaner alternative for flame retardant coatings.
COLLOIDS AND SURFACES A-PHYSICOCHEMICAL AND ENGINEERING ASPECTS
(2023)
Article
Thermodynamics
Wen-Juan Hu, Ying-Ming Li, Yi-Ran Li, De-Yi Wang
Summary: The study demonstrated that DA-APP as a flame retardant for TPU significantly improved the flame retardancy of TPU composites, reducing the risk of fire and decreasing smoke and heat release. The key mechanism for this enhancement was the promotion of TPU to produce water and carbon dioxide by DA-APP, diluting the oxygen concentration, and the formation of a dense carbon layer isolating heat and oxygen.
JOURNAL OF THERMAL ANALYSIS AND CALORIMETRY
(2022)
Article
Chemistry, Applied
Ying-Jun Xu, Lian-Yi Qu, Yun Liu, Ping Zhu
Summary: Alginates are naturally occurring polysaccharides that have inherent flame retardancy, making them ideal for eco-friendly flame-retardant materials. The influence of metal ions on the flame retardancy and pyrolysis behaviors of alginates has been studied systematically. Alginates have great potential in applications such as preparing flame-retardant fibers, fabrics, and aerogel composites.
CARBOHYDRATE POLYMERS
(2021)
