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
Thermodynamics
Yuanyuan Zhan, Bihe Yuan, Sheng Shang
Summary: The possibility of using layered melamine-phytate (MEL-PA) as a synergist for intumescent flame retardant (IFR) is explored. The study shows that MEL-PA can effectively improve the flammability and fire-retardant performance of polypropylene (PP) composites.
JOURNAL OF THERMAL ANALYSIS AND CALORIMETRY
(2022)
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
Kui Chen, Jingwei Cheng, Bin Wu, Chengjuan Liu, Jianing Guo
Summary: By incorporating SrCO3 as a synergistic agent, the flame retardancy of PP composite materials can be significantly enhanced, along with an improvement in mechanical properties. SrCO3 catalyzes the MAPP reaction to form a cross-linked structure, promoting the formation of a stable carbon layer.
POLYMERS FOR ADVANCED TECHNOLOGIES
(2021)
Article
Polymer Science
Yingtong Pan, Zhonglin Luo, Biaobing Wang
Summary: Amino trimethylene phosphonic acid piperazine (ATPIP) salt, a novel charring agent, was prepared through a simple ionic reaction and showed synergistic flame retardant effect with ammonium polyphosphate (APP) as an intumescent flame retardant (IFR). The ternary blend of polypropylene (PP)/modified APP with piperazine (MAPP)/ATPIP passed UL-94 V-0 rating and exhibited excellent smoke suppression performance.
JOURNAL OF APPLIED POLYMER SCIENCE
(2021)
Article
Thermodynamics
Xuhui Yang, Siyu Jiang, Zhiyong Zhang, Bin Li, Miaojun Xu
Summary: In this study, the zeolite imidazolate frameworks-67 (ZIF-67) were prepared and used as a synergist in intumescent flame-retarded polypropylene composites to enhance the flame retardant efficiency and smoke suppression. The addition of 5% ZIF-67 significantly increased the residual char of the composite from 24.9% to 63.5%, attributed to the cobalt ion complexation effect. The composites containing 18% IFR/ZIF-67 achieved UL-94V-0 rating and had a limiting oxygen index value of 31.1%, showing improved flame retardancy and smoke suppression compared to those containing 18% IFR.
JOURNAL OF THERMAL ANALYSIS AND CALORIMETRY
(2023)
Article
Polymer Science
Fatih Demiryuguran, Nazim Usta
Summary: In this study, the addition of fly ash was found to enhance the effectiveness of an intumescent flame retardant system in polypropylene. The experimental results showed improvements in the fire resistance and mechanical properties of the composites, although the tensile strength and modulus were slightly decreased.
JOURNAL OF APPLIED POLYMER SCIENCE
(2023)
Article
Polymer Science
Linyuan Wang, Yue Wei, Hongbo Deng, Ruiqi Lyu, Jiajie Zhu, Yabing Yang
Summary: The study found that the addition of Pa-Ba to IFR can improve the flame retardancy of EP composites, leading to a reduction in the amount of IFR needed and expanding the application range of EP. The EP/14IFR/2Ba composite showed the highest LOI value and a significant decrease in PHRR compared to pure EP, indicating better carbonization quality.
Article
Polymer Science
Fuhua Lin, Mi Zhang, Xiangyang Li, Shuangdan Mao, Yinghui Wei
Summary: This study aims to enhance the flame retardancy performance of high impact polystyrene (HIPS) by incorporating intumescent flame retardant (IFR) and diatoms into the HIPS matrix. The results show that the IFR/diatoms system exhibits high flame retardant efficiency and catalytic carbonization effect, reducing heat release and smoke generation while improving tensile and impact strength.
Article
Materials Science, Multidisciplinary
Zhe Huang, Shenghua Li, Lung-Chang Tsai, Tao Jiang, Ning Ma, Fang-Chang Tsai
Summary: A single molecule intumescent flame retardant was synthesized through in-situ polymerization by chitosan-based ammonium polyphosphate microencapsulated by melamine-formaldehyde resin. It exhibited excellent thermal stability at high temperatures and reduced heat absorption on the surface of the composite material, effectively inhibiting its decomposition. Polypropylene composites containing the flame retardant showed improved limiting oxygen index and vertical combustion grade, as well as excellent anti-dripping effect.
MATERIALS TODAY COMMUNICATIONS
(2022)
Article
Chemistry, Physical
Yongliang Wang, Baoqiang Liu, Ruiyang Chen, Yunfei Wang, Zhidong Han, Chunfeng Wang, Ling Weng
Summary: Silica nanoparticles were added to polypropylene composites with ammonium polyphosphate and pentaerythritol to enhance flame retardancy. The dispersion of nano-silica in the composite matrix was favorable and improved the flame retardancy. The synergistic effects between nano-silica and intumescent flame retardant were studied using various tests, and the results showed improved flame retardancy with the addition of nano-silica.
Article
Polymer Science
Zhe Huang, Bo Ruan, Jin Wu, Ning Ma, Tao Jiang, Fang-Chang Tsai
Summary: The study developed flame retardant polypropylene containing micro-envelope core-shell structure flame retardants, which showed improved fire safety and thermal stability. Additionally, polyamide 6 was found to have a better char-forming effect, contributing to the enhanced flame retardant performance.
JOURNAL OF APPLIED POLYMER SCIENCE
(2021)
Article
Materials Science, Composites
Suxi Wang, Qi Feng Lim, Jessica Pei Wen Toh, Ming Yan Tan, Qiang Zhu, Warintorn Thitsartarn, Chaobin He, Songlin Liu, Junhua Kong
Summary: A novel phosphorus-based macromolecular flame-retardant synergist (DPS) was synthesized and combined with base flame retardants to form binary intumescent flame retardant systems for polypropylene and polyamide 6 matrices. The synergistic actions of DPS and base flame retardants enhance the flame-retardant performance by scavenging free radicals and promoting char formation. The developed binary IFR systems also improve the mechanical properties of the composites.
COMPOSITES COMMUNICATIONS
(2023)
Article
Polymer Science
Zheng Yang, Xueting Chen, Shike Lu, Zhenhua Wang, Jiantong Li, Baoying Liu, Xiaomin Fang, Tao Ding, Yuanqing Xu
Summary: The ammonium polyphosphate (APP) was modified by a titanate coupling agent to form a new type of intumescent flame retardant (Ti-IFR) when compounded with benzoxazine (BOZ) and melamine (ME). CaCO3 was used as a synergist with Ti-IFR to modify polyoxymethylene (POM). The flame-retardant properties and mechanism of the composites were analyzed, and it was found that Ti-IFR enhanced the gas phase flame retardant effect, while CaCO3 strengthened the barrier effect in the condensed phase. When used together, they exhibited excellent synergistic effect.
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
Zhongming Yuan, Hiroko Yamamoto, Shinji Kanehashi, Takeshi Shimomura
Summary: This study reports the synthesis of a flexible light-emitting polymer film using a solution blending method. The selective positioning of MEH-PPV molecules in the PS phase of the film was confirmed. The film exhibited a nanometer-scale luminescent domain with low aggregation quenching and showed good elastomeric characteristics.
POLYMERS FOR ADVANCED TECHNOLOGIES
(2024)