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
Chemistry, Physical
Jingxing Wu, Jianhua Bi, Baoluo Xu, Lisha Fu, Wanjun Hao
Summary: In this study, the surface of ammonium polyphosphate (APP) was modified by a commercial titanate coupling agent ndz-201, and a styrene-acrylic emulsion (SAE)-based damping composite material was prepared using the modified APP and expandable graphite (EG). The results showed that when the ratio of modified APP to EG was 1:4, the composite material exhibited a limiting oxygen index (LOI) of 52.5% and achieved a V0 rating in the vertical burning test (UL-94), with a 141.9% increase in LOI compared to the composite material without flame retardant. Furthermore, the optimized formulation of modified APP and EG in SAE-based damping composite materials demonstrated a significant synergistic effect on the flame retardancy of the composite material.
Article
Chemistry, Applied
Puzhong Gu, Tiankai Jiang, Jun Zhang
Summary: A high near-infrared reflective cooling compound with flame retardant characteristics was fabricated by incorporating Sb2O3 and DBDPE into EVA. The addition of Sb2O3 and DBDPE significantly reduced the temperature of the compound, showing good performance under sunlight exposure and indoors.
JOURNAL OF VINYL & ADDITIVE TECHNOLOGY
(2022)
Article
Polymer Science
Shaoquan Li, Xiao-Dong Zhu, Long Li, Yi Qian, Qingjie Guo, Jingjing Ma
Summary: This study successfully synthesized a smoke-suppressant and flame-retardant LDH using fly-ash as a raw material and tested its flame retardant properties in EVA/LDHs composites. The results showed good flame retardancy and smoke suppression effects.
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
Daohai Zhang, Meng Pei, Ke Wei, Fang Tan, Chengtao Gao, Dongmei Bao, Shuhao Qin
Summary: In this study, a DOPO derivative-conjugated flame retardant P-PPD-Ph with two hydroxyl groups was synthesized and used to prepare polylactic acid (PLA) conjugated flame-retardant composites. The flame-retardant properties of the composites were investigated using limiting oxygen index (LOI) and vertical burning test (UL94). It was found that the addition of 5 wt% conjugated flame retardant achieved a V-0 rating, indicating excellent flame retardancy.
FRONTIERS IN CHEMISTRY
(2022)
Article
Engineering, Chemical
Michael Heinz, Christoph Callsen, Waldemar Stoecklein, Volker Altstaedt, Holger Ruckdaeschel
Summary: This work aimed to investigate the influence of a grafted coupling agent in EVA/LLDPE blends with mineral filler as a flame-retardant. The results showed that the coupling agent improved the compatibility of the blend, leading to enhanced thermo-mechanical performance by relocating the filler and creating a connection between polymer phases.
POLYMER ENGINEERING AND SCIENCE
(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
Chemistry, Multidisciplinary
Junzhuo Sun, Daohai Zhang, Xiaoyu Shang, Fang Tan, Dongmei Bao, Shuhao Qin
Summary: The study prepared long fiber reinforced polybutylene terephthalate (LGF/PBT/DOPO-HQ) flame-retardant composites using DOPO-HQ as the flame-retardant. The effects of different flame-retardant contents on the combustion properties were investigated. The results showed that the composite achieved V-0 level flame retardancy and had low heat release rate and high oxygen index after adding 14% of DOPO-HQ.
FRONTIERS IN CHEMISTRY
(2022)
Article
Chemistry, Physical
Jose Hobson, Guang-Zhong Yin, Xiaoli Yu, Xiaodong Zhou, Silvia Gonzalez Prolongo, Xiang Ao, De-Yi Wang
Summary: Rare earth oxide particles have gained significant attention due to their wide diversity of applications. In this study, cerium oxide was incorporated into EVA/MDH composites, resulting in improved flame retardancy, mechanical properties, and anti-ultraviolet aging performance. The addition of CeO2 significantly increased the elongation at break and Young's modulus of the composites, and reduced the peak heat release rate. The combination of CeO2 with MDH improved the filler-polymer interaction and dispersion, leading to enhanced mechanical properties, flame retardancy, and anti-ultraviolet aging performance.
Article
Polymer Science
Xiaoyu Zhang, Donglin Zhang, Wenchao Zhang, Jiyu He, Rongjie Yang
Summary: By synthesizing polycarbonate (PC) composites with 1,3-benzenedisulfonic acid dipotassium salt (KSP), the PC sample with only 0.01 wt% KSP exhibited superior flame retardant properties, reaching UL-94 V-0 rating while maintaining mechanical properties.
POLYMER DEGRADATION AND STABILITY
(2023)
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
Engineering, Chemical
Meng Pei, Ke Wei, Daohai Zhang, Shuhao Qin
Summary: In this study, a phosphazene flame retardant (DOPO-PHBA) was synthesized and added to PLA with epoxy chain extender (ECE) to prepare PLA/ECE/DOPO-PHBA flame-retardant composites. The results show that when 5wt% DOPO-PHBA is added, the PLA composites can achieve V-0 level combustion with an LOI value of 30.0%, and the LOI value increases from 22.5% to 33.6% with the increase in flame-retardant content. Furthermore, the PLA composites still maintain good mechanical properties, and the flame-retardant mechanism involves free radical quenching, gas dilution, and thermal barrier caused by the carbon layer.
POLYMER ENGINEERING AND SCIENCE
(2023)
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
Shikun Zhao, Xiangyang Chen, Yang Zhou, Biao Zhao, Qing Hu, Shangtao Chen, Kai Pan
Summary: With the increasingly prominent global resource and environmental issues, bio-based polyamides are showing promising prospects due to their renewable and low carbon emission characteristics. The copolymerization of reactive flame retardants with biomass monomers to prepare intrinsically flame-retardant polyamides has become a hot research topic. In this study, a reactive flame retardant with excellent solubility and temperature resistance is synthesized, and flame retardant polyamide 56 with excellent flame-retardant performance, temperature resistance, and mechanical properties is prepared through one-step melt polycondensation.
POLYMER DEGRADATION AND STABILITY
(2023)
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)
