Article
Polymer Science
Junxiao Li, Lijun Qian, Wang Xi, Yong Qiu, Wei Tang, Shanzhe Li
Summary: The alloying synergistic flame retardant effect of using PEI and ADP for PA6 was investigated, which can provide PA6 composites with excellent mechanical properties and flame retardancy simultaneously. Adding PEI with PA6 can form PEI-PA6 alloy with nice homogeneous phase, which endows PA6 composites with excellent mechanical properties. The addition of ADP can increase the LOI value and flame retardant rating, reduce the HRR and THR, and increase the char residue rate, showing an excellent flame retardant synergistic effect. ADP works together with PEI to increase the quenching effect in the gas phase and promote thermal stability, while also increasing the char yield in the condensed phase. The alloying flame retardant method using ADP/PEI-PA6 can endow PA6 with better flame retardancy and more excellent mechanical properties.
JOURNAL OF APPLIED POLYMER SCIENCE
(2022)
Article
Polymer Science
Hongni Wang, Zhongjie He, Yudeng Wang, Zhilin Zhang, Xiaoqian Li, Dechao Wang, Fangfang Su, Dongdong Yao, Yaping Zheng
Summary: Functionalized graphene oxide (FGO) modified with phosphorus/nitrogen compound and zinc hydroxystannate shows high thermal stability and dispersity in epoxy resin (EP), leading to significant reduction in fire, smoke, and toxicity hazards.
JOURNAL OF APPLIED POLYMER SCIENCE
(2022)
Article
Polymer Science
Ben Liu, Jiacheng Xu, Honglai Xue, Zhongjun Shu, Guoguang Xu, Hongxiang Ou, Yunxuan Weng
Summary: By adding PF@ADP to LDPE, the flame retardancy and mechanical properties of the composite material can be significantly improved, including increasing the limiting oxygen index and UL-94 grade, enhancing the tensile strength and elongation at break, and aiding in reducing the smoke emission of LDPE.
JOURNAL OF APPLIED POLYMER SCIENCE
(2021)
Article
Polymer Science
Cheng-Shou Zhao, Han-Ming Yang, Yi-Song Jiang, Hong-wei Cui, Zhen-Jun Luo, De-Yan Kong, Hua-Qiao Peng, Nima Esmaeili
Summary: This study focuses on the thermal decomposition behaviors of EP/15%APP-Cu2O and found that it has better flame retardant properties compared to EP/15%APP. The addition of APP or APP-Cu2O enhances the thermal degradation activation energies of EP, contributing to the protective effect of char formation. Incorporation of 3 wt% Cu2O significantly decreases the thermal degradation activation energies at the early decomposition stage of EP, potentially contributing to intumescent char formation and improving fire safety.
JOURNAL OF APPLIED POLYMER SCIENCE
(2022)
Article
Polymer Science
Zhi-Gang Yuan, Zhao-Hui Shu, Liang Qi, Wan-An Cai, Wen-Bin Liu, Jun Wang, Mehdi Derradji, Yan-hui Wang
Summary: In this study, the curing behavior, thermal stability, mechanical properties and flammability of E-D/A-E composites with different contents of flame retardants were investigated. The results showed that the thermal and flammability properties of the composites were improved by adding flame retardants.
JOURNAL OF APPLIED POLYMER SCIENCE
(2023)
Article
Polymer Science
Yifan Suo, Wei Gao, Zhongwei Chen, Yuan Yu, Tingting Chen, Changxin Li, Qingwu Zhang, Juncheng Jiang
Summary: Surface modification of cellulose nanocrystal (CNC) was carried out to prepare flame retardant CNC@DPP@Zn, which was then added into epoxy resins (EP). The addition of CNC@DPP@Zn significantly reduced the peak heat release rate (pHRR) and total smoke production (TSP) of the composites.
JOURNAL OF APPLIED POLYMER SCIENCE
(2022)
Article
Polymer Science
Yao Xu, Jinhao Sun, Lijun Qian, Juan Li
Summary: The research shows that combining DOPO and PDA can significantly enhance the flame retardancy of epoxy resin and reduce the peak heat release rate. The volatilization of DOPO can quench free radicals and stop combustion. While increasing the amount of PDA/DOPO can raise the glass transition temperature, the aggregation of PDA in EP leads to decreased tensile properties of the composite material.
JOURNAL OF APPLIED POLYMER SCIENCE
(2021)
Article
Polymer Science
Long Xie, Bo Liu, Xinhua Liu, Yueyue Lu
Summary: A durable flame retardant fiber (VF/PR-DPCP) was successfully developed in this study by wet spinning through blending self-made flame retardant (PR-DPCP) and viscose slurry. The fiber exhibited high residual amount and flame retardancy at high temperatures, and its performance was almost unaffected after washing.
JOURNAL OF APPLIED POLYMER SCIENCE
(2022)
Article
Polymer Science
Haohao Ding, Zhonglin Luo, Biaobing Wang
Summary: A new phosphorus/sulfur-containing compound SBPDPP is synthesized and incorporated into epoxy resin, accelerating the curing process and improving fire safety and smoke suppression.
JOURNAL OF APPLIED POLYMER SCIENCE
(2022)
Article
Polymer Science
Michael Weinert, Manfred Doering
Summary: Two novel N-phosphorylated iminophosphoranes with DOPO moieties exhibit distinctive flame-retardant effects in two different epoxy resin systems, with one being more effective in the condensed phase and the other more suitable for the gas phase, depending on the chemical environment.
JOURNAL OF APPLIED POLYMER SCIENCE
(2021)
Article
Materials Science, Composites
Yang Li, Juncheng Jiang, Zhiquan Chen, Zhongwei Chen, Lei Ni
Summary: The novel microcapsule flame retardant MAHP significantly improves the flame retardancy and heat resistance of EP matrix, with a large amount of residue in TG tests. The addition of MAHP also results in a dense and continuous carbon layer in char residues, while retaining the mechanical properties of the material.
POLYMER COMPOSITES
(2021)
Article
Polymer Science
Jia Chen, Li Rong, Wei Fang, Jiyan Liu, Xueqing Liu
Summary: The flame retardancy of ABS was greatly enhanced by a highly efficient intumescent flame retardant coating, which improved the oxygen index value, UL-94 rating, and reduced the heat release rate. The flame retardant coating showed synergistic flame retardancy in both gas phase and condensed phase, while also protecting the intrinsic mechanical properties of ABS.
JOURNAL OF APPLIED POLYMER SCIENCE
(2022)
Article
Polymer Science
Xinglong Kang, Yan Liu, Ningxuan Chen, Weili Feng, Baoying Liu, Yuanqing Xu, Jiantong Li, Tao Ding, Xiaomin Fang
Summary: The study found that modified APP can significantly improve the flame retardant and mechanical properties of POM, with GW-APP showing the best synergistic effect with Novolac and ME, resulting in POM composites reaching UL-94 V-0 rating and having a LOI value of 34.0%.
JOURNAL OF APPLIED POLYMER SCIENCE
(2021)
Article
Polymer Science
Wenyi Zhang, Zhongwei Chen, Yuan Yu, Tingting Chen, Qingwu Zhang, Changxin Li, Zhiquan Chen, Wei Gao, Juncheng Jiang
Summary: The phosphorus and silicon co-doped graphitic carbon nitride (PSiCN) was synthesized by polycondensation of melamine, diammonium hydrogen phosphate, and silicic acid. The addition of 2 wt% PSiCN and 8 wt% ammonium polyphosphate (APP) improved the thermal stability and flame retardancy of the composites, reducing heat release rate and smoke production. Analysis of residues after CCT revealed the flame retardant mechanism of EP/2PSiCN-8APP composite.
JOURNAL OF APPLIED POLYMER SCIENCE
(2022)
Article
Polymer Science
Zhiquan Chen, Yang Li, Lei Ni, Juncheng Jiang, Yuan Yu, Qiang Chen
Summary: The organic-inorganic double-shell microencapsulated aluminum hypophosphite (MSiAHP) particles enhance the flame-retardant performance, thermal stability, and mechanical properties of epoxy resin composites.
JOURNAL OF APPLIED POLYMER SCIENCE
(2021)