scholarly journals Comparative Studies on Thermal, Mechanical, and Flame Retardant Properties of PBT Nanocomposites via Different Oxidation State Phosphorus-Containing Agents Modified Amino-CNTs

Nanomaterials ◽  
2018 ◽  
Vol 8 (2) ◽  
pp. 70 ◽  
Author(s):  
San-E Zhu ◽  
Li-Li Wang ◽  
Hao Chen ◽  
Wei Yang ◽  
Anthony Yuen ◽  
...  
Keyword(s):  
Polymer Nanocomposites ◽  
Oxidation State ◽  
High Performance ◽  
Melt Blending ◽  
Phosphoryl Chloride ◽  
One Pot ◽  
Blending Method ◽  
Phosphorus Containing ◽  
Flame Retardant Properties ◽  
Thermal Stability Of

High-performance poly(1,4-butylene terephthalate) (PBT) nanocomposites have been developed via the consideration of phosphorus-containing agents and amino-carbon nanotube (A-CNT). One-pot functionalization method has been adopted to prepare functionalized CNTs via the reaction between A-CNT and different oxidation state phosphorus-containing agents, including chlorodiphenylphosphine (DPP-Cl), diphenylphosphinic chloride (DPP(O)-Cl), and diphenyl phosphoryl chloride (DPP(O3)-Cl). These functionalized CNTs, DPP(Ox)-A-CNTs (x = 0, 1, 3), were, respectively, mixed with PBT to obtain the CNT-based polymer nanocomposites through a melt blending method. Scanning electron microscope observations demonstrated that DPP(Ox)-A-CNT nanoadditives were homogeneously distributed within PBT matrix compared to A-CNT. The incorporation of DPP(Ox)-A-CNT improved the thermal stability of PBT. Moreover, PBT/DPP(O3)-A-CNT showed the highest crystallization temperature and tensile strength, due to the superior dispersion and interfacial interactions between DPP(O3)-A-CNT and PBT. PBT/DPP(O)-A-CNT exhibited the best flame retardancy resulting from the excellent carbonization effect. The radicals generated from decomposed polymer were effectively trapped by DPP(O)-A-CNT, leading to the reduction of heat release rate, smoke production rate, carbon dioxide and carbon monoxide release during cone calorimeter tests.

scholarly journals Comparative Studies on Thermal, Mechanical, and Flame Retardant Properties of PBT Nanocomposites with Functionalized Amino-Carbon Nanotubes Modified by Different Oxidation State Phosphorus-containing Agents

2018 ◽  
Author(s):  
San-E Zhu ◽  
Li-Li Wang ◽  
Hao Chen ◽  
Wei Yang ◽  
Anthony Yuen ◽  
...  
Keyword(s):  
Oxidation State ◽  
High Performance ◽  
Melt Blending ◽  
Phosphoryl Chloride ◽  
One Pot ◽  
Blending Method ◽  
Phosphorus Containing ◽  
Nano Additives ◽  
Flame Retardant Properties ◽  
Thermal Stability Of

High-performance poly(1,4-butylene terephthalate (PBT) nanocomposites have been developed via the consideration of phosphorus-containing agents and amino-carbon nanotube (A-CNT). One-pot functionalization method has been adopted to prepare functionalized CNTs via the reaction between A-CNT and different oxidation state phosphorus-containing agents, including chlorodiphenylphosphine (DPP-Cl), diphenylphosphinic chloride (DPP(O)-Cl), and diphenyl phosphoryl chloride (DPP(O3)-Cl). These functionalized CNTs, DPP(Ox)-A-CNTs (x = 0, 1, 3), were respectively mixed with PBT to obtain the CNTs-based polymer nanocomposites through a melt blending method. SEM observations demonstrated that DPP(Ox)-A-CNT nano-additives were homogeneously distributed within PBT matrix compared to A-CNT. The incorporation of DPP(Ox)-A-CNT improved the thermal stability of PBT. Moreover, PBT/DPP(O3)-A-CNT showed the highest crystallization temperature and tensile strength, due to the superior dispersion and interfacial interactions between DPP(O3)-A-CNT and PBT. PBT/DPP(O)-A-CNT exhibited the best flame retardancy resulting from the excellent carbonization effect. The radicals generated from decomposed polymer were effectively trapped by DPP(O)-A-CNT, leading to the reduction of heat release rate, smoke production rate, carbon dioxide and carbon monoxide release during cone calorimeter tests.

A Study of Polyvinyl Chloride Modified by Barium Sulfate

2011 ◽  
Vol 117-119 ◽  
pp. 1402-1405
Author(s):  
Hao Wu ◽  
You Ming Cao
Keyword(s):  
Barium Sulfate ◽  
Tensile Fracture ◽  
Melt Blending ◽  
Toughening Mechanism ◽  
Fracture Characteristics ◽  
Elongation At Break ◽  
Tensile Yield Stress ◽  
Tensile Fracture Surface ◽  
Blending Method ◽  
Thermal Stability Of

PVC/BaSO4 composites were prepared by melt blending method. The mechanical properties, microstructure and thermal stability of the composites were investigated. The results indicated that BaSO4 decreased the tensile yield stress and improved the elongation at break of PVC composites. Ductile fracture characteristics such were observed in the tensile fracture surface of PVC/BaSO4 composites. The toughening mechanism was cavitations toughening mechanism and shear zone toughening mechanism. The reaction of dehydrochlorination was limited by the addition of BaSO4.

Carbon Nanotube Network in Polymer Nanocomposites: Rheology and Flammability

2014 ◽  
Vol 998-999 ◽  
pp. 27-30
Author(s):  
Hai Yun Ma ◽  
Jia Wei Liu ◽  
Wen Chuan Han ◽  
Li Ci Zhao
Keyword(s):  
Carbon Nanotube ◽  
Polymer Nanocomposites ◽  
Power Law ◽  
Network Structure ◽  
Flame Retardancy ◽  
Cone Calorimeter ◽  
Melt Blending ◽  
Blending Method ◽  
Carbon Nanotube Network ◽  
Rheological Percolation

ABS/MWNTs nanocomposites were prepared by using melt blending method. Cone calorimeter and ARES were employed to measure flammability and rheological properties. The flammability properties are strongly affected by the network structure. From the results of ARES tests, it is observed that when the MWNTs content is higher than 1 wt%, nanotubes network structure is formed and flame retardancy of the nanocomposites is significantly improved. The rheological percolation threshold, 0.72 wt%, was determined on the basis of a power law relation.

Thermal Analysis of Polylactic Acid/Liquid Natural Rubber Reinforced with Multi-Walled Carbon Nanotubes

2016 ◽  
Vol 1133 ◽  
pp. 481-485 ◽  
Author(s):  
Adilah Mat Ali ◽  
Sahrim H. Ahmad
Keyword(s):  
Carbon Nanotubes ◽  
Thermal Properties ◽  
Natural Rubber ◽  
Polylactic Acid ◽  
Melt Blending ◽  
Blending Method ◽  
Liquid Natural Rubber ◽  
Multi Walled Carbon Nanotubes ◽  
Walled Carbon Nanotubes ◽  
Thermal Stability Of

This article studies the thermal properties of multi-walled carbon nanotubes (MWCNT) reinforced polylactic acid (PLA)/liquid natural rubber (LNR) blends which prepared via melt blending method. Various percentages (0.5, 1.5, 2.5, 3.5 and 4 wt%) of MWCNT were added into PLA/LNR blend. TGA shows that the addition of MWCNT into PLA/LNR blends helps to improve thermal stability of the PLA/LNR/MWCNT nanocomposites. DSC shows that the glass transition temperature increased when 0.5%, 1.5%, 2.5% and 3.5% of MWCNT was added to the PLA/LNR blend. The cold crystallization and melting temperature were reduced when MWCNT was added in the PLA/LNR blend systems. The SEM micrographs confirm the effect of good dispersion of 3.5wt% of MWCNT in PLA/LNR blend helps to promote well combined MWCNT-matrix networks and generate the synergistic effect of the system which is improved the thermal properties significantly.

Manufacturing the Hybrid Materials of Polypropylene/Nano Poly(Phenylsilsesquioxane) with Good Thermal Stability

2010 ◽  
Vol 148-149 ◽  
pp. 979-982
Author(s):  
Xin Long Wang ◽  
Jin Li
Keyword(s):  
Thermal Stability ◽  
Thermogravimetric Analysis ◽  
Hybrid Materials ◽  
Melt Blending ◽  
Good Thermal Stability ◽  
Blending Method ◽  
Thermal Stability Of

The nano poly(phenylsilsesquioxane) particles (nano-PPSQ) were prepared with both basic and acidic catalyzed processes and the PP/nano-PPSQ composites were prepared by melt blending method. The morphology and thermal stability of PP/nano-PPSQ composites were characterized by SEM, XRD and TGA. The SEM results showed that the particles were well dispersed in the PP matrix and the XRD revealed that the addition of nano-PPSQ influences the crystallinity of PP. The thermogravimetric analysis results of the PP/ nano-PPSQ composites indicated that the incorporation of nano-PPSQ can improve the thermal stability of PP obviously.

scholarly journals Study on Thermal and Flame Retardant Properties of Phosphorus-containing Polyimides

2020 ◽  
Vol 72 (4) ◽  
pp. 13-21
Author(s):  
Diana Serbezeanu ◽  
Tachita Vlad-Bubulac ◽  
Elena Hamciuc ◽  
Corneliu Hamciuc ◽  
Gabriela Lisa ◽  
...  
Keyword(s):  
Flame Retardant ◽  
Side Chain ◽  
Combustion Mechanism ◽  
Limiting Oxygen Index ◽  
Phosphorus Containing ◽  
Key Factor ◽  
Flame Retardant Properties ◽  
Microscale Combustion Calorimetry ◽  
Thermal Stability Of ◽  
Structure Confirmation

The present study aimed to design macromolecular architectures having imide core in the main chain and bearing two 9,10-dihydro-oxa-10-phosphaphenanthrene-10-oxide heterocycles in the side chain of each structural units as a synergetic two components key factor to induce attractive flame retardant properties in the resulted materials. The synthesis pathway consisted in the classical polycondensation reaction strategy using a phosphorus-containing diamine synthesized in the laboratory and three commercial dianhydrides co-monomers. The chemical structure confirmation of the phosphorus-containing polyimides has been performed by means of FTIR and NMR spectroscopy. The thermal stability of the products was introspected through TGA analysis. The char yields measured at 900oC ranged between 35% and 54%. Using these parameters limiting oxygen index values were theoretically calculated. Also, the microscale combustion calorimetry measurements have been conducted, in order to investigate the combustion mechanism of the synthesized phosphorus-containing polyimides.

One-pot synthesized ABA tri-block copolymers for high-performance organic field-effect transistors

2018 ◽  
Vol 9 (36) ◽  
pp. 4517-4522 ◽  
Author(s):  
Feng Ge ◽  
Zhen Liu ◽  
Fengshou Tian ◽  
Yuchang Du ◽  
Lingyun Liu ◽  
...  
Keyword(s):  
Block Copolymers ◽  
Field Effect ◽  
High Performance ◽  
Field Effect Transistors ◽  
Organic Field Effect Transistors ◽  
One Pot ◽  
Blending Method

A series of P3HT-b-PHA-b-P3HT tri-block copolymers were synthesized in one pot and fabricated into organic field-effect transistors by a blending method.

scholarly journals Flame retardation performances of phosphorus-containing compounds in unsaturated polyester

2015 ◽  
Vol 18 (3) ◽  
pp. 145-152
Author(s):  
Huyen Thi Thu Nguyen ◽  
Linh Thi Thuy Pham ◽  
Quy Thi Dong Hoang
Keyword(s):  
Thermal Stability ◽  
Fire Resistance ◽  
Flame Retardants ◽  
Unsaturated Polyester ◽  
Hydrogen Phosphite ◽  
Char Layer ◽  
Phosphorus Containing ◽  
Flame Retardant Properties ◽  
Flame Retardation ◽  
Thermal Stability Of

Aluminium hydrogen phosphite (AHP) was synthesized in order to investigate their flame retarding performances for unsaturated polyester (UP). AHP and triphenyl phosphate (TPP) flame retardants were studied to increase fire resistance and thermal stability of materials. UL 94HB rating is achieved at 15 wt% AHP - 15 wt% TPP loading. Sample with 30 wt% loading of AHP has the burning rate slower than that of neat UP. The incorporation of FR increases the flame retardant properties as well as the amounts of charred residues protecting the mixture from further degradation. This assertion can be accepted when observing that the char yield of UP/FR mixtures at 500-650 oC is much higher than that of neat UP. The char layer may limit the amount of fuel available and insulate the underlying polymer from the flame and, thus, make further degradation more difficult.

scholarly journals Towards High-performance Materials Based on Carbohydrate-Derived Polyamide Blends

Polymers ◽  
2019 ◽  
Vol 11 (3) ◽  
pp. 413 ◽  
Author(s):  
Aleksandra Wróblewska ◽  
Nils Leoné ◽  
Stefaan De Wildeman ◽  
Katrien Bernaerts
Keyword(s):  
Thermal Stability ◽  
Thermal Properties ◽  
Acid Ester ◽  
High Performance ◽  
Melt Blending ◽  
Aromatic Diamines ◽  
Biobased Materials ◽  
Dodecanedioic Acid ◽  
Thermal Stability Of ◽  
Aliphatic Polyamide

A bio-derived monomer called 2,3:4,5-di-O-isopropylidene-galactarate acid/ester (GalXMe) has great potential in polymer production. The unique properties of this molecule, such as its rigidity and bulkiness, contribute to the good thermal properties and appealing transparency of the material. The main problem, however, is that like other biobased materials, the polymers derived thereof are very brittle. In this study, we report on the melt blending of GalXMe polyamides (PAs) with different commercial PA grades using extrusion as well as blend characterization. Biobased PA blends showed limited to no miscibility with other polyamides. However, their incorporation resulted in strong materials with high Young moduli. The increase in modulus of the prepared GalXMe blends with commercial PAs ranged from up to 75% for blends with aliphatic polyamide composed of 1,6-diaminohexane and 1,12-dodecanedioic acid PA(6,12) to up to 82% for blends with cycloaliphatic polyamide composed of 4,4′-methylenebis(cyclohexylamine) and 1,12-dodecanedioic acid PA(PACM,12). Investigation into the mechanism of blending revealed that for some polyamides a transamidation reaction improved the blend compatibility. The thermal stability of the biobased PAs depended on which diamine was used. Polymers with aliphatic/aromatic or alicyclic diamines showed no degradation, whereas with fully aromatic diamines such as p-phenylenediamine, some degradation processes were observed under extrusion conditions (260/270 °C).

Dynamic Rheology and Thermal Stability of PTT/POE-g-MAH Blends

2011 ◽  
Vol 382 ◽  
pp. 260-263
Author(s):  
Ming Tao Run ◽  
Feng Liu ◽  
Chun Yan Jiang ◽  
Na Li
Keyword(s):  
Thermal Stability ◽  
Shear Rate ◽  
Complex Viscosity ◽  
Dynamic Rheology ◽  
Melt Blending ◽  
Pseudoplastic Fluid ◽  
Blending Method ◽  
Ethylene Copolymer ◽  
Trimethylene Terephthalate ◽  
Thermal Stability Of

The blends of poly (trimethylene terephthalate)(PTT) and maleinized poly (octene-ethylene) copolymer (POE-MAH) were prepared by melt-blending method and their rheology and thermal stability were investigated by using rotational rheometer and thermalgravimetric analyzer (TGA) respectively. The rheological properties of PTT/POE-MAH blends demonstrate that all of the blends belong to the pseudoplastic fluid for their complex viscosity declines with the increasing shear rate. In addition, POE component can strengthen the melt viscosity, so the blend can be processed in the more wider temperature range. Moreover, the complex viscosity become more sensitive to the change of the shear rate, i.e., it decreases more apparently with the increase of the POE-MAH component. The melt flexibility increases apparently with the increase of the POE-g-MAH component. POE-MAH component only has a little depression on the thermal stability of the blends.

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