Preparation of flame retardant glass fiber via emulsion impregnation and application in polyamide 6
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Yue Cheng
and
Chunzhong Li
Abstract
As a commonly used reinforcement, glass fiber (GF) can improve the mechanical properties of thermoplastics. However, previous studies have suggested that GF was not good for the flame retardancy of thermoplastics because of “wick effect.” Herein, a novel flame retardant emulsion was synthesized, containing film-former, lubricant, silane coupling agent, and ammonium polyphosphate modified by 3-aminopropyltriethoxysilane (mAPP). The GF impregnated with flame retardant emulsion and aluminum diethlyphosphinate (ADP) were blended with polyamide 6 (PA6) to prepare flame retardant GF reinforced PA6 (FRGFPA6/ADP). The LOI of FRGFPA6/ADP-15 can reach 34.7%, which is much higher than that of GF reinforced PA6 (GFPA6) and it also pass the UL-94 test and reach V-0 rating without dripping. The mHRR, pHRR, and THR of FRGFPA6/ADP-15 are reduced by 44.2, 121.0, and 26.3% compared to GFPA6. After burning, the surface of flame retardant GF can form a carbon layer, which improved the efficiency of interfacial flame retardancy between GF and PA6 and weakened the “wick effect.” At the same time, ADP is added to the matrix to release free radicals to capture oxygen in the air, and carbon layer is formed to isolate the air. The synergistic effect of ADP and mAPP increased the flame retardancy of GFPA6.
Funding source: National Natural Science Foundation of China
Award Identifier / Grant number: 21878092
Award Identifier / Grant number: 21838003
Award Identifier / Grant number: 51621002
Funding source: Shanghai Scientific and Technological Innovation Project
Award Identifier / Grant number: 19JC1410400
Funding source: Program of Shanghai Academic Research Leader
Award Identifier / Grant number: 19XD1401400
Funding source: Innovation Program of Shanghai Municipal Education Commission
Funding source: Key Research and Development Plan of Anhui Province
Award Identifier / Grant number: 202104g01020003
Funding source: Fundamental Research Funds for the Central Universities
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Author contributions: Yue Cheng: conceptualization, methodology, investigation, writing–original draft. Ling Zhang: writing–review and editing, supervision, project administration. Chunzhong Li: supervision, funding acquisition.
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Research funding: This work was supported by the National Natural Science Foundation of China (21878092, 21838003 and 51621002), the Shanghai Scientific and Technological Innovation Project (19JC1410400), Program of Shanghai Academic Research Leader (19XD1401400), the Innovation Program of Shanghai Municipal Education Commission, Key Research and Development Plan of Anhui Province (202104g01020003), and the Fundamental Research Funds for the Central Universities.
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Conflict of interest statement: The authors declare that they have no known competing financial interests or personal relationships that could have appeared to influence the work reported in this paper.
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Supplementary Material
The online version of this article offers supplementary material (https://doi.org/10.1515/polyeng-2022-0022).
© 2022 Walter de Gruyter GmbH, Berlin/Boston
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Articles in the same Issue
- Frontmatter
- Material Properties
- Advancement in hemp fibre polymer composites: a comprehensive review
- Effects and mechanism of filler content on thermal conductivity of composites: a case study on plasticized polyvinyl chloride/graphite composites
- Effects of Eucommia ulmoides gum content and processing conditions on damping properties of E. ulmoides gum/nitrile-butadiene rubber nanocomposites
- Preparation and Assembly
- Preparation of flame retardant glass fiber via emulsion impregnation and application in polyamide 6
- Invertase adsorption with polymers functionalized by aspartic acid
- Engineering and Processing
- External field alignment of nickel-coated carbon fiber/PDMS composite for biological monitoring with high sensitivity
- Development of a cavity pressure control for injection moulding by adjusting the cross-section in the hot runner
- Process optimization for extraction of avian eggshell membrane derived collagen for tissue engineering applications
- Joint formation mechanism of different laser transmission welding paths
