The Bio-based Phthalocyanine Resins with High Tg and High Char Yield Derived from Vanillin

Polymer ◽  
2021 ◽  
pp. 123723
Author(s):  
Caiyun Wang ◽  
Manling Shi ◽  
Linxuan Fang ◽  
Menglu Dai ◽  
Gang Huang ◽  
...  
Keyword(s):  
Char Yield

Synthesis and characterization of some polyimide-epoxy composites

e-Polymers ◽  
2011 ◽  
Vol 11 (1) ◽  
Author(s):  
Toheed Akhter ◽  
Humaira Masood Siddiqi ◽  
Zareen Akhter ◽  
M. Saeed Butt
Keyword(s):  
Thermal Behavior ◽  
Epoxy Resins ◽  
Analytical Techniques ◽  
Char Yield ◽  
Epoxy Composites ◽  
Hydroxyl Group ◽  
Synthesis And Characterization ◽  
Tetracarboxylic Acid ◽  
Epoxy Amine

AbstractComposites from some novel polyimide and commercial epoxy were prepared aiming to improve the thermal behavior of epoxy resins. Two diamines namely 4-4'-diamino-4''-hydroxytriphenyl methane (DHTM) and 4-4'- diaminotriphenyl methane (DTM) were synthesized by reacting aniline and aldehydes according to a reported method. The synthesized diamines were blended with commercially available epoxy 1, 4-butanedioldiglycidylether (BDDE) to synthesize model epoxy amine networks which were compared with polyimideepoxy composites. The polyimides were synthesized by reaction of these diamines with aromatic anhydride namely 3,3',4,4'-benzophenone tetracarboxylic acid dianhydride (BTDA). These synthesized polyimides were dispersed in epoxy diamine networks to prepare composites. All the monomers and composites were characterized by making use of various analytical techniques including FTIR, NMR, TGA, DSC and XRD. Presence of hydroxyl group in the diamine helped in better dispersion of polyimide leading to high Tg and high char yield at 600 °C.

scholarly journals Validation of MATLAB algorithm to implement a two-step parallel pyrolysis model for the prediction of maximum %char yield

2021 ◽  
Vol 1 (1) ◽  
Author(s):  
Ibiba Taiwo Horsfall ◽  
Macmanus Chinenye Ndukwu ◽  
Fidelis Ibiang Abam ◽  
Ololade Moses Olatunji ◽  
Ojong Elias Ojong ◽  
...  
Keyword(s):  
Experimental Data ◽  
Isothermal Condition ◽  
Char Yield ◽  
Experimental Investigations ◽  
Time Saving ◽  
Pyrolysis Products ◽  
Pyrolysis Model ◽  
Experimental Yield ◽  
By Products ◽  
Good Agreement

AbstractNumerical modeling of biomass pyrolysis is becoming a cost and time-saving alternative for experimental investigations, also to predict the yield of the by-products of the entire process. In the present study, a two-step parallel kinetic model was used to predict char yield under isothermal condition. MATLAB ODE45 function codes were employed to solve a set of differential equations that predicts the %char at varying residence times and temperatures. The code shows how the various kinetic parameters and mass of pyrolysis products were determined. Nevertheless, the algorithm used for the prediction was validated with experimental data and results from past works. At 673.15 K, the numerical simulation using ODE45 function gives a char yield of 27.84%. From 573.15 K to 673.15 K, char yield ranges from 31.7 to 33.72% to 27.84% while experimental yield decreases from 44 to 22%. Hence, the error between algorithm prediction and experimental data from literature is − 0.26 and 0.22. Again, comparing the result of the present work with the analytical method from the literature showed a good agreement.

Using QSPR techniques to predict char yield arising from the thermal degradation of polybenzoxazines

2013 ◽  
Vol 98 (1) ◽  
pp. 446-452 ◽  
Author(s):  
Ian Hamerton ◽  
Brendan J. Howlin ◽  
Phumzile Mhlanga ◽  
Wan Aminah Wan Hassan
Keyword(s):  
Thermal Degradation ◽  
Char Yield

scholarly journals Synthesis and characterization of carborane bisphenol resol phenolic resins with ultrahigh char yield

2015 ◽  
Vol 33 (11) ◽  
pp. 1606-1617 ◽  
Author(s):  
Shi-cheng Qi ◽  
Guo Han ◽  
Hong-rui Wang ◽  
Ning Li ◽  
Xiao-a Zhang ◽  
...  
Keyword(s):  
Char Yield ◽  
Synthesis And Characterization ◽  
Phenolic Resins

Synthesis of a novel DOPO‐based polyphosphoramide with high char yield and its application in flame‐retardant epoxy resins

2019 ◽  
Vol 68 (5) ◽  
pp. 936-945 ◽  
Author(s):  
Chandra Sekhar Reddy Gangireddy ◽  
Xin Wang ◽  
Yongchun Kan ◽  
Lei Song ◽  
Yuan Hu
Keyword(s):  
Flame Retardant ◽  
Epoxy Resins ◽  
Char Yield

The significance of heating rate on char yield and char properties in the pyrolysis of cellulose

Carbon ◽  
1980 ◽  
Vol 18 (3) ◽  
pp. 217-224 ◽  
Author(s):  
Paul H. Brunner ◽  
Paul V. Roberts
Keyword(s):  
Heating Rate ◽  
Char Yield

Carbonisation of bagasse in a fixed bed reactor: influence of process variables on char yield and characteristics

2003 ◽  
Vol 28 (5) ◽  
pp. 713-725 ◽  
Author(s):  
Surinder Katyal ◽  
Kelly Thambimuthu ◽  
Marjorie Valix
Keyword(s):  
Fixed Bed ◽  
Char Yield ◽  
Fixed Bed Reactor ◽  
Process Variables

Effects of Gangue on Pyrolysis of Municipal Solid Waste

2013 ◽  
Vol 779-780 ◽  
pp. 1394-1397
Author(s):  
Jin Wei Jia ◽  
Xin Qian Shu ◽  
He Long Hui ◽  
Xing Min Fu ◽  
Shu Cheng Liu ◽  
...  
Keyword(s):  
Municipal Solid Waste ◽  
Solid Waste ◽  
Fixed Bed ◽  
Pyrolysis Product ◽  
Char Yield ◽  
Fixed Bed Reactor ◽  
Yield Increase ◽  
Gaseous Products ◽  
Pyrolytic Reaction ◽  
Liquid Yield

To investigate the effects of gangue on pyrolysis of municipal solid waste (MSW), pyrolysis of MSW with gangue has been conducted by TG and fixed-bed reactor, respectively. The effect of gangue on pyrolysis product yields and compositions of gaseous products was investigated and the obtained results were compared with similar experiments without gangue. It was shown that gangue can improve the pyrolytic reaction of MSW, reduce the char yield, increase the liquid yield. And influences of gangue on yields of H2, CO, CH4 and CO2 were more apparent, the yields of H2, CO and CO2 with gangue were improved 12.5%, 11.8% and 175%, respectively, conversely, the yield of CH4 was reduced 15.4% compared with no gangue.

Sign in / Sign up

Export Citation Format

Share Document