scholarly journals Thermal and Flame Retardant Properties of Shaped Polypropylene Fibers Containing Modified-Thai Bentonite

2018 ◽  
Vol 18 (1) ◽  
pp. 13-19 ◽  
Author(s):  
Chureerat Prahsarn ◽  
Nanjaporn Roungpaisan ◽  
Wattana Klinsukhon ◽  
Natthaphop Suwannamek ◽  
Sirada Padee
Keyword(s):  
Thermal Stability ◽  
Flame Retardant ◽  
High Thermal Stability ◽  
Hollow Fibers ◽  
Polypropylene Fibers ◽  
Cross Sectional ◽  
Flame Retardant Property ◽  
C Fibers ◽  
Flame Retardant Properties ◽  
Shaped Fibers

Abstract Tetraphenyl phosphonium-modified organoclay (TPP-Mt) was prepared by modifying montmorillonite-rich Thai bentonite via ion exchange. TGA results revealed that TPP-Mt possessed high thermal stability, where degradation occurred at a temperature range of 418-576°C. The obtained TPP-Mt/PP nanocomposites exhibited degradation at higher temperatures than PP (410-420°C vs. 403°C). Fibers of different cross-sectional shapes (circular, circular hollow, and cross) containing 1, 2 and 3%wt TPP-Mt were prepared and characterized. Nonwovens of 3%wt TPPMt/PP fibers were fabricated for flame retardant test. From results, nonwovens of TPP-Mt/PP fibers exhibited self-extinguishing characteristic and the areas of burning were less than that of PP nonwoven (14.5-31.6% vs. 95.6%). Nonwovens of cross-shaped fibers showed the best flame retardant property, followed by those of circular hollow and circular fibers. The flame retardant properties observed in nonwovens were explained due to the inter-fiber spaces between cross-shaped fibers and center hole in circular hollow fibers, which could trap initiating radicals inside, thus reducing flame propagation. In addition, large surface area in cross-shaped fibers could help in increasing the flame retardant effectiveness due to more exposure of TPP-Mt particles to the flame. Knowledge obtained in this study offered an approach to produce flame retardant nonwovens via a combination of modified organolcay and fiber shape.

scholarly journals An Alginate Hybrid Sponge with High Thermal Stability: Its Flame Retardant Properties and Mechanism

Polymers ◽  
2019 ◽  
Vol 11 (12) ◽  
pp. 1973 ◽  
Author(s):  
Yuhuan Jiang ◽  
Xuening Pang ◽  
Yujia Deng ◽  
Xiaolu Sun ◽  
Xihui Zhao ◽  
...  
Keyword(s):  
Thermal Stability ◽  
Thermal Degradation ◽  
Flame Retardant ◽  
Calcium Alginate ◽  
Degradation Mechanism ◽  
Renewable Resource ◽  
High Thermal Stability ◽  
Carbonate Content ◽  
Limiting Oxygen Index ◽  
Flame Retardant Properties

The worldwide applications of polyurethane (PU) and polystyrene (PS) sponge materials have been causing massive non-renewable resource consumption and huge loss of property and life due to its high flammability. Finding a biodegradable and regenerative sponge material with desirable thermal and flame retardant properties remains challenging to date. In this study, bio-based, renewable calcium alginate hybrid sponge materials (CAS) with high thermal stability and flame retardancy were fabricated through a simple, eco-friendly, in situ, chemical-foaming process at room temperature, followed by a facile and economical post-cross-linking method to obtain the organic-inorganic (CaCO3) hybrid materials. The microstructure of CAS showed desirable porous networks with a porosity rate of 70.3%, indicating that a great amount of raw materials can be saved to achieve remarkable cost control. The sponge materials reached a limiting oxygen index (LOI) of 39, which was greatly improved compared with common sponge. Moreover, with only 5% calcium carbonate content, the initial thermal degradation temperature of CAS was increased by 70 °C (from 150 to 220 °C), compared to that of calcium alginate, which met the requirements of high-temperature resistant and nonflammable materials. The thermal degradation mechanism of CAS was supposed based on the experimental data. The combined results suggest promising prospects for the application of CAS in a range of fields and the sponge materials provide an alternative for the commonly used PU and PS sponge materials.

Synthesis of novel phosphorus-containing epoxy hardeners and thermal stability and flame-retardant properties of cured products

2012 ◽  
Vol 125 (2) ◽  
pp. 1219-1225 ◽  
Author(s):  
Yuan-Qin Xiong ◽  
Xu-Yong Zhang ◽  
Jia Liu ◽  
Ming-Ming Li ◽  
Fei Guo ◽  
...  
Keyword(s):  
Thermal Stability ◽  
Flame Retardant ◽  
Phosphorus Containing ◽  
Flame Retardant Properties

scholarly journals Functionalization of MXene Nanosheets for Polystyrene towards High Thermal Stability and Flame Retardant Properties

Polymers ◽  
2019 ◽  
Vol 11 (6) ◽  
pp. 976 ◽  
Author(s):  
Jing-Yu Si ◽  
Benjamin Tawiah ◽  
Wei-Long Sun ◽  
Bo Lin ◽  
Cheng Wang ◽  
...  
Keyword(s):  
Thermal Stability ◽  
Flame Retardant ◽  
High Performance ◽  
Decyltrimethylammonium Bromide ◽  
Cone Calorimeter Test ◽  
Uniform Dispersion ◽  
Flame Retardant Properties ◽  
Octadecyltrimethylammonium Bromide ◽  
Surface Modified ◽  
Long Chain

Fabricating high-performance MXene-based polymer nanocomposites is a huge challenge because of the poor dispersion and interfacial interaction of MXene nanosheets in the polymer matrix. To address the issue, MXene nanosheets were successfully exfoliated and subsequently modified by long-chain cationic agents with different chain lengths, i.e., decyltrimethylammonium bromide (DTAB), octadecyltrimethylammonium bromide (OTAB), and dihexadecyldimethylammonium bromide (DDAB). With the long-chain groups on their surface, modified Ti3C2 (MXene) nanosheets were well dispersed in N,N-dimethylformamide (DMF), resulting in the formation of uniform dispersion and strong interfacial adhesion within a polystyrene (PS) matrix. The thermal stability properties of cationic modified Ti3C2/PS nanocomposites were improved considerably with the temperatures at 5% weight loss increasing by 20 °C for DTAB-Ti3C2/PS, 25 °C for OTAB-Ti3C2/PS and 23 °C for DDAB-Ti3C2/PS, respectively. The modified MXene nanosheets also enhanced the flame-retardant properties of PS. Compared to neat PS, the peak heat release rate (PHRR) was reduced by approximately 26.4%, 21.5% and 20.8% for PS/OTAB-Ti3C2, PS/DDAB-Ti3C2 and PS/DTAB-Ti3C2, respectively. Significant reductions in CO and CO2 productions were also obtained in the cone calorimeter test and generally lower pyrolysis volatile products were recorded by PS/OTAB-Ti3C2 compared to pristine PS. These property enhancements of PS nanocomposites are attributed to the superior dispersion, catalytic and barrier effects of Ti3C2 nanosheets.

A novel methacrylate with a bisphosphonate group: RAFT polymerization and flame retardant property of the resultant polymers

2015 ◽  
Vol 6 (12) ◽  
pp. 2283-2289 ◽  
Author(s):  
Tianchi Xu ◽  
Lifen Zhang ◽  
Zhenping Cheng ◽  
Xiulin Zhu
Keyword(s):  
Flame Retardant ◽  
Raft Polymerization ◽  
Flame Retardant Property ◽  
Methacrylate Monomer ◽  
Flame Retardant Properties

In this work, a novel methacrylate monomer with a bisphosphonate group was synthesized and then polymerized by RAFT polymerization to obtain well-defined polymers with better thermal and flame-retardant properties.

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