Article
Polymer Science
Weijiang Huang, Kui Wang, Chunyun Tu, Xiaolu Xu, Qin Tian, Chao Ma, Qiuping Fu, Wei Yan
Summary: This study investigated the synergistic effects of PN-DOPO and OMMT on the flame retardancy, thermal stability, and mechanical properties of PP composites. The results showed that the combination of PN-DOPO and OMMT improved the fire resistance and overall performance of the PP composites. Rheological and TGA analysis indicated enhanced network structure and thermal stability in the presence of OMMT.
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
Materials Science, Paper & Wood
Junjie Wang, Xuejun Yu, Shengsong Dai, Xinyu Wang, Zhiquan Pan, Hong Zhou
Summary: This study systematically investigated the effects of chitosan-based derivative (CSA), DOPO, and CSA/DOPO additives on the flammable properties of EP composites. The results showed a significant improvement in flame retardancy and mechanical strength, with reduced smoke emission and heat release rate, increased residual char amount, and enhanced flexural strength. The synergistic effect of CSA and DOPO played a crucial role in enhancing the overall performance of the EP composites.
Article
Thermodynamics
Jing Gao, Weijiang Huang, Wentao He, Lijuan Long, Shuhao Qin
Summary: This study successfully improved the flame retardancy of glass fiber-reinforced polyamide 6T composites through the synergistic effect between PN-DOPO and CNT, achieving a V-0 rating and higher limiting oxygen index value. The introduction of CNTs enhanced thermal stability and promoted the formation of stable char layers, effectively protecting the matrix from fire damage.
JOURNAL OF THERMAL ANALYSIS AND CALORIMETRY
(2022)
Article
Chemistry, Multidisciplinary
Jing Gao, Wentao He, Yushu Xiang, Lijuan Long, Shuhao Qin
Summary: The study demonstrated that DOPO-NH2 showed superior thermal, flame retardant, and mechanical performances to PA6 composites, mainly due to the existence of amino terminal group which improved the compatibility between the flame retardant and PA6 matrix.
FRONTIERS IN CHEMISTRY
(2022)
Article
Chemistry, Applied
Yang Luo, Jingyu Cai, Ling Li, Xiaocheng Lin, Longqiang Xiao, Linxi Hou
Summary: A new multi-DOPO-based reactive flame retardant (DZH) was successfully synthesized and used as a co-curing agent with DDM in epoxy resin (EP), achieving a balance between flame retardancy and overall performance. The addition of DZH decreased the activation energy of the curing reaction system and enhanced the formation of char residues under high temperature conditions. The EP/DZH system exhibited significantly improved flame retardancy and mechanical properties at certain additions.
PROGRESS IN ORGANIC COATINGS
(2023)
Article
Polymer Science
Yanlu Sun, Zhengqi Wang, Dequn Wu, Xueli Wang, Jianyong Yu, Ruchao Yuan, Faxue Li
Summary: In this work, a reactive flame retardant composed of DDP and PDPS was used to fabricate FR-PA6 with enhanced fire safety and melt spinnability. The prepared FR-PA6-5-5 showed a UL94 V-0 rating, reduced heat release rate and total heat release compared to pure PA6. The improved fire safety was due to gas-phase quenching and dilution effect, condensed-phase barrier effect, and synergistic charring effect achieved through the formation of P(=O)-O-Si.
POLYMER DEGRADATION AND STABILITY
(2023)
Article
Polymer Science
Wen-Jie Jin, Yuan Yuan, Jin-Ping Guan, Xian-Wei Cheng, Guo-Qiang Chen
Summary: The application of insoluble DOPO compound on PA6 fabric showed great potential to improve flame retardancy, anti-dripping property, and reduce smoke and heat release. The DOPO coating exhibited good washing durability on PA6 fabric. This study provides a valuable direction for future research on FR PA6 fabric with DOPO derivatives.
POLYMER DEGRADATION AND STABILITY
(2023)
Article
Thermodynamics
Ying Zhou, Min He, Lan Xie, Weidi He, Dinghong Xu, Hongming Wu, Guangqiang Xiao, Shuhao Qin, Jianbing Guo
Summary: The study examined the flammability, thermal, and mechanical properties of thermoplastic polyurethane (TPU)/DOPO derivative (DiDOPO)/sepiolite composites fabricated by a melt blending process. The TPUSEP3 composite achieved UL-94 V0 classes and showed enhanced flexural strength. The presence of sepiolite and DiDOPO led to improvements in the fire performance of the composites.
JOURNAL OF THERMAL ANALYSIS AND CALORIMETRY
(2022)
Article
Polymer Science
Hu Rong, Yong Guo, Zhongwei Chen, Tingting Chen, Yuan Yu, Chunlei He, Jing Zhou, Xuliang Liu, Qingwu Zhang, Yajie Bu, Juncheng Jiang
Summary: A novel reactive flame retardant, PPDA, was synthesized by neutralizing PPOA with ODA. When incorporated into EP alongside DOPO, EP/PPDA/DOPO composite exhibited excellent flame retardancy and reduced heat release rate, smoke production, and total heat release. The presence of organic phosphorus structures and non-flammable nitrogen compounds contributed to its superior performance. PPDA/DOPO is a promising halogen-free alternative for flame retardants.
POLYMER DEGRADATION AND STABILITY
(2023)
Article
Thermodynamics
Xinxin Wang, Wentao He, Lijuan Long, Shaowen Huang, Shuhao Qin, Guomin Xu
Summary: The study successfully improved the flame resistance of PLA by incorporating a phosphorus and nitrogen-containing DOPO derivative (DOPO-NH2), achieving an LOI value of 26% with just 5% mass of DOPO-NH2 added. The hydrogen bonds formed between DOPO-NH2 and the PLA matrix maintained the mechanical properties of the composite.
JOURNAL OF THERMAL ANALYSIS AND CALORIMETRY
(2021)
Article
Engineering, Multidisciplinary
Lei He, Tao Chen, Yi Zhang, Lianrui Hu, Ting Wang, Rui Han, Jia-Lin He, Wei Luo, Zhi-Guo Liu, Jin-Ni Deng, Ming-Jun Chen
Summary: A bulky aromatic structure imide-DOPO derivative (BMP) successfully imparts flame retardancy and fluorescence simultaneously to epoxy resins. BMP, benefiting from space hindering and intermolecular interactions, maintains the glass transition temperature of the epoxy resin with minor impact on mechanical properties.
COMPOSITES PART B-ENGINEERING
(2022)
Article
Engineering, Environmental
Marija Colovic, Jelena Vasiljevic, Ziga Strin, Natasa Celan Korosin, Matic Sobak, Barbara Simoncic, Andrej Demsar, Giulio Malucelli, Ivan Jerman
Summary: This study presents a novel approach for the preparation of a flame retardant polyamide 6 polymer with chemically bonded DOPO as a pendant group bridged to the polymer via an -NH- group. The chemical modification decreased the molecular weight of the polymer, improved thermal stability, and enhanced flame retardant properties of the material.
CHEMICAL ENGINEERING JOURNAL
(2021)
Article
Polymer Science
Pengfei Ji, Yihua Cui, Dongyue Liu, Tianlong Zhang, Jipeng Lv
Summary: The novel functionalized graphene oxide (F-GO) decorated with a double-phosphaphenanthrene structure was successfully incorporated into epoxy resins as a highly effective flame retardant, enhancing the fire resistance and mechanical properties significantly. Despite the extremely low loading, F-GO had a significant impact on the limiting oxygen index, total heat release, and peak heat release rate of the epoxy resins.
POLYMERS FOR ADVANCED TECHNOLOGIES
(2021)
Article
Polymer Science
Song Wang, Weidong Wu, Qi Chen, Zhan Ding, Sanxi Li, Ailing Zhang, Tao Tang, Jie Liu, Patrick U. Okoye
Summary: In this study, a magnesium phosphate whisker (DPM-H) was synthesized and a new synergistic intumescent flame retardant (IFR) for epoxy resin (EP) was developed. The experimental results showed that the IFR significantly improved the flame retardancy of the EP and partially solved the negative effect caused by the addition of ammonium polyphosphate (APP) on the mechanical properties of the EP.
JOURNAL OF APPLIED POLYMER SCIENCE
(2023)
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)