Article
Polymer Science
Yanlu Sun, Zhengqi Wang, Dequn Wu, Xueli Wang, Jianyong Yu, Ruchao Yuan, Faxue Li
Summary: The lack of flame retardants with suitable thermal properties and high flame retardancy hinders the development of flame-retardant polyamide 6 (PA6). In this study, a phosphorus-containing flame retardant (CBPB) with flame-responsive nitrile groups was synthesized, and its properties matched those required for flame retardancy in PA6. PA6/CBPB composites (FR-PA6s) were prepared by blending CBPB into the PA6 matrix, resulting in materials with V-0 UL-94 rating and a limiting oxygen index (LOI) of 32.0% when 8 wt% of CBPB was added. FR-PA6-6, a representative composite with 6 wt% CBPB, exhibited good mechanical properties and self-extinction in 4 seconds during vertical burning tests, with minimal dripping.
POLYMER DEGRADATION AND STABILITY
(2022)
Article
Polymer Science
Qianqian Qi, Zhe Xiao, Yaowei Wang, Xinjin Yan, Peng Fu, Xiaomeng Zhang, Wei Zhao, Xinchang Pang, Minying Liu, Qingxiang Zhao, Zhe Cui
Summary: In this study, a series of novel silicone-containing polyamides were successfully synthesized, and their properties were regulated by the Si12 unit-content. The characterized chemical structure and physical properties revealed that the polyamides exhibited good elasticity, flame retardancy, and blue luminescence. These silicone-containing polyamides have promising application potential for high-performance polymeric materials.
Article
Polymer Science
Wen-Jie Jin, Xian-Wei Cheng, Wei-Lin He, Liang Gu, Jin-Ping Guan
Summary: This study developed an eco-friendly and sustainable flame retardant approach for polyamide 6 (PA6) fabrics using natural products. The synthesized biomass phytate taurine salt (PTS) was coated onto PA6 fabric, improving its flame retardant performance. The coated fabric showed excellent flame retardancy even after multiple wash cycles.
POLYMER DEGRADATION AND STABILITY
(2022)
Article
Chemistry, Applied
Ye Tao, Chang Liu, Ping Li, Bin Wang, Ying-Jun Xu, Zhi-Ming Jiang, Yun Liu, Ping Zhu
Summary: This study successfully prepared a flame-retardant coating for PET fabrics using a rapid dip-coating process, improving their combustion performance. The experimental results showed that FR-PET fabrics with GPA coating released fewer combustible products during thermal decomposition, eliminated melt-dripping, and exhibited enhanced tensile strength.
PROGRESS IN ORGANIC COATINGS
(2021)
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
Chemistry, Physical
Zhiming Jiang, Hongyan Li, Chenxi Zhang, Ping Zhu
Summary: This study explored the fire-safety capabilities of cyclic phosphoramides with different substitutions on PET fabric. It was found that these compounds exhibited good flame retardancy and non-dripping performance. The flame-retardant coatings enhanced the char-forming capacity of PET fabric and effectively reduced the peak heat release rate and total heat release. Furthermore, these coatings had no detrimental effects on the mechanical characteristics of PET fabric and even improved the weft's tensile breaking forces.
SURFACES AND INTERFACES
(2022)
Article
Polymer Science
Wei Zhang, Hui Li, Weihong Cao, Zhenghong Guo, Zhengping Fang, Juan Li, Peng Chen
Summary: In this study, an organophosphorus flame retardant (BHD) and a charring-coupling agent (DE) were synthesized and coated on aluminum diethylphosphinate (ADP) to form BD-ADP. PA6 blended with 12 wt% BD-ADP achieved a UL-94 V-0 rating and a limiting oxygen index of 30.0 vol%. By substituting 1.0 wt% DE for BD-ADP, PA6-1.0E not only achieved a UL-94 V-0 rating, but also exhibited a longer ignition time and improved mechanical properties compared to PA6-12A.
JOURNAL OF APPLIED POLYMER SCIENCE
(2023)
Article
Polymer Science
Kai Xu, Xing Tian, Ying Cao, Yaqi He, Yanzhi Xia, Fengyu Quan
Summary: Calcium alginate fibers and flame-retardant polyamide-66 were used to prepare composite paper, where the addition of FR-PA effectively suppressed the combustion of Ca-Alg by forming a compact carbon layer. The combustion and thermal degradation behavior of the composite paper were analyzed using cone calorimetry and other methods, with the results showing excellent flame retardancy of the composite paper.
Article
Chemistry, Multidisciplinary
Jingnan Zhang, Siming Lian, Yifan He, Xinyu Cao, Jiaming Shang, Qingyun Liu, Gang Ye, Kun Zheng, Yongmei Ma
Summary: A new method was proposed to improve the thermal stability of the highly reactive flame retardant CPPOA, resulting in the successful synthesis of intrinsic flame-retardant polyamide 66 (FRPA66) with excellent properties. The FRPA66 showed high flame retardancy and good mechanical properties, demonstrating great potential for various applications.
Article
Engineering, Environmental
Min Jiang, Bo-Wen Liu, Feng-Ming He, Qin Zhang, Ao Wang, Hai-Bo Zhao, Li Chen, Yu-Zhong Wang
Summary: We successfully designed and synthesized high-performance polymers with excellent overall properties by simultaneously modulating their chemical constitution and topological conformation. The incorporation of a sidechain caged structure enhanced chain entanglement, leading to improved mechanical strength and heat resistance. Additionally, the flame retardancy of the polymers was significantly enhanced due to the free radical scavenging effect of the phosphorus-based monomer. This work provides a novel method for fabricating high-performance polymers for various applications.
CHEMICAL ENGINEERING JOURNAL
(2023)
Article
Engineering, Environmental
Qin Zhang, Guo-Rui Zhu, Xiang-Xin Xiao, Qing-Song Liu, Min Jiang, De-Ming Guo, Hai-Bo Zhao, Wen-Da Li, Li Chen, Bo-Wen Liu, Yu-Zhong Wang
Summary: Constructing micro cross-linking structures into molecular chains improves basic properties of thermoplastic polymers. However, this method has limitations in improving polymer functionality. In this study, a multifunctional micro cross-linking network was reported, enhancing not only mechanical strength but also flame retardancy, dielectric properties, battery performance, antistatic properties, etc. A novel phosphinamide-containing monomer was synthesized and copolymerized into the polymer chain, resulting in improved tensile strength and flame retardancy, as well as various other desirable properties.
CHEMICAL ENGINEERING JOURNAL
(2023)
Article
Polymer Science
Huixin Wang, Ling Sun, Shihao Wang, Yuyang Li, Xin Jin, Wenzhan He, Jie Liu, Ping Zhu, Chaohong Dong
Summary: A novel phosphorus-nitrogen-silicon-calcium alginate flame-retardant system was prepared and used to coat polyester fabrics, forming a dense intumescent char layer that improved the flame retardancy and smoke suppression efficacy of the fabrics.
JOURNAL OF POLYMER RESEARCH
(2022)
Article
Polymer Science
Ling-Li Jiao, Peng-Cheng Zhao, Zhi-Qi Liu, Qing-Shan Wu, Dong-Qiang Yan, Yi-Lan Li, Yu-Nan Chen, Ji-Sheng Li
Summary: In this study, hydromagnesite was used to synthesize magnesium hydroxide as a flame retardant for EVA. The introduction of magnesium hydroxide significantly improved the flame retardant properties and smoke suppression of the composites. The incorporation of different concentrations of sodium hydroxide had limited effect on the mechanical properties of the composites.
Article
Environmental Sciences
Peng Qi, Feng Chen, Yuchun Li, Yichong Jiang, Tao Zhu, Jun Sun, Hongfei Li, Xiaoyu Gu, Sheng Zhang
Summary: In this study, a highly-effective hyperbranched flame retardant (DT) was synthesized by ester exchange and coated on PET fabric to improve its fire performance. The treated PET fabric showed good flame retardancy and physical properties. Moreover, the processing of the flame retardant was eco-friendly. This work provides a facile and eco-friendly strategy for fabricating flame retardant PET fabric with excellent comprehensive performances.
Article
Polymer Science
Wen-Jie Jin, Wei-Lin He, Liang Gu, Xian-Wei Cheng, Jin-Ping Guan
Summary: This study developed an eco-friendly intumescent flame retardant coating for polyamide 6 fabric. The coated fabric exhibited excellent flame retardancy with reduced heat release rate and eliminated dripping. The mechanical properties of the fabric were minimally affected by the coating.
EUROPEAN POLYMER JOURNAL
(2022)
Article
Polymer Science
Tetsu Sato, Mariko Takahashi, Takeshi Saito, Masahito Toyonaga, Itsuo Tanuma, Rie Yamada, Satoru Hosoda
Summary: An automatic evaluation system for photooxidation has been developed and successfully applied to assess the photo-OIT of LDPE samples containing photooxidation stabilizers. The system allows independent setting of various measurement conditions and provides detailed information on the photooxidation process.
POLYMER DEGRADATION AND STABILITY
(2024)
Article
Polymer Science
Zongzheng Zuo, Shuxue Zhou
Summary: In this study, three fluoroalkyl trimethoxysilane (FATMS) additives with different chain lengths were incorporated into a two-component polyurethane clearcoat to improve its hydrophobic durability. The coatings modified with FATMS maintained their surface hydrophobicity under various conditions, but quickly lost it when exposed to both UV irradiation and/or high temperature with water. The results suggest that the FATMS route is more suitable for indoor applications at room temperature.
POLYMER DEGRADATION AND STABILITY
(2024)
Article
Polymer Science
Song Li, Feng Zhao, Xueya Wang, Zhihua Liu, Jingze Guo, Yutong Li, Shuangmei Tan, Zhenxiang Xin, Shuai Zhao, Lin Li
Summary: Green flame retardants have garnered attention for their environmental friendliness, but current options fall short in achieving high flame retardancy for flammable polymers and maintaining environmental protection. This study takes a two-pronged approach to address flame retardants and the flame-retardant process. An eco-friendly bio-based synergistic flame retardant (PAU), synthesized using phytic acid (PA) and urea (U), is used to create a flame retardant coating that can be directly applied to any surface shape using polydopamine as an adhesive. The resulting EPS-PAU exhibits excellent flame retardancy, smoke suppression, and light weight while only slightly increasing the density.
POLYMER DEGRADATION AND STABILITY
(2024)
