Study on Thermal Degradation Behavior of Composites with Liquid Crystalline Thermoset

2014 ◽  
Vol 1033-1034 ◽  
pp. 927-930
Author(s):  
Hee Jung Moon ◽  
Seung Hyun Cho
Keyword(s):  
Thermal Degradation ◽  
Liquid Crystalline ◽  
Nitrogen Atmosphere ◽  
Degradation Behavior ◽  
Melt Blending ◽  
Scanning Calorimetry ◽  
Thermal Degradation Behavior ◽  
Liquid Crystalline Thermoset ◽  
Weight Loss Process ◽  
Thermosetting Epoxy

Liquid crystalline thermosetting epoxy, 4,4’-Diglycidyloxy-α-methylstilbene (DOMS) was synthesized and characterized with cross-polarized optical microscopy (POM) and differential scanning calorimetry (DSC). Alumina reinforced DOMS composites were fabricated by melt blending with sulfanilamide (SAA) as a curing agent. To investigate thermal degradation behavior, thermogravimetric analysis (TGA) was performed under nitrogen atmosphere at the temperature range from 30 to 1000°C. Activation energies for decomposition (Ed) by TGA were determined as a function of conversion by weight loss process.

Thermal Degradation Behavior of Composites with Liquid Crystalline Epoxy and Aluminum Nitride

2015 ◽  
Vol 749 ◽  
pp. 299-303
Author(s):  
Hee Jung Moon ◽  
Bong Soo Lee ◽  
Seung Hyun Cho
Keyword(s):  
Thermal Degradation ◽  
Aluminum Nitride ◽  
Liquid Crystalline ◽  
Nitrogen Atmosphere ◽  
Curing Agent ◽  
Degradation Behavior ◽  
Melt Blending ◽  
Thermal Degradation Behavior ◽  
Liquid Crystalline Epoxy ◽  
Weight Loss Process

Liquid crystalline epoxy, 4,4’-Diglycidyloxy-α-methylstilbene (DOMS) was synthesized and Aluminum Nitride reinforced DOMS composites were fabricated by melt blending with sulfanilamide (SAA) as a curing agent. Thermal degradation behavior was investigated by thermogravimetric analysis (TGA) under nitrogen atmosphere at the temperature range from 30 to 1000°C. Activation energies for decomposition (Ed) by TGA were determined as a function of conversion by weight loss process.

Activation Energies of Liquid Crystalline Thermoset Containing Rigid-Rod Epoxy

2011 ◽  
Vol 378-379 ◽  
pp. 628-631 ◽  
Author(s):  
Seung Hwan Byun ◽  
Seung Hyun Cho
Keyword(s):  
Differential Scanning Calorimetry ◽  
Weight Loss ◽  
Thermogravimetric Analysis ◽  
Liquid Crystalline ◽  
Activation Energies ◽  
Scanning Calorimetry ◽  
Polarized Optical Microscopy ◽  
Rigid Rod ◽  
Liquid Crystalline Thermoset ◽  
Weight Loss Process

4,4’-Diglycidyloxy-α-methylstilbene (DOMS) was synthesized and characterized with cross-polarized optical microscopy (POM), differential scanning calorimetry (DSC) and thermogravimetric analysis (TGA). Activation energies for decomposition (Ed) by TGA were determined as a function of conversion by weight loss process.

Poly(Vinyl Butyral) Pyrolysis: Interactions with Plasticizer and Ain Ceramic Powder

1991 ◽  
Vol 249 ◽  
Author(s):  
H. Yan ◽  
W. R. Cannon ◽  
D. J. Shanefield
Keyword(s):  
Thermal Degradation ◽  
Gas Phase ◽  
Dibutyl Phthalate ◽  
Ceramic Powder ◽  
Tape Casting ◽  
Nitrogen Atmosphere ◽  
Degradation Behavior ◽  
Butyl Benzyl Phthalate ◽  
Thermal Degradation Behavior ◽  
Vinyl Butyral

ABSTRACTTGA and FTIR were employed to investigate the effects of dibutyl phthalate and butyl benzyl phthalate on the thermal degradation behavior of PVB, a binder used commonly for tape casting. Butyl benzyl phthalate was found to enhance the crosslinking of the PVB binder when heated in a nitrogen atmosphere during binder pyrolysis, which retarded its thermal degradation.The interaction between AIN powder and PVB binder was also studied by using TGA, XPS and a special furnace for collecting residual carbon. Intrinsic char and gas phase mediated char were studied separately.

Thermal Analysis of Chitosan-Lactate and Chitosan-Aluminum Monostearate Composite System

2012 ◽  
Vol 506 ◽  
pp. 278-281 ◽  
Author(s):  
Kotchamon Yodkhum ◽  
T. Phaechamud
Keyword(s):  
Thermal Stability ◽  
Thermal Analysis ◽  
Thermal Degradation ◽  
Chitosan Solution ◽  
Melting Behavior ◽  
Degradation Behavior ◽  
Scanning Calorimetry ◽  
Chitosan Derivatives ◽  
Thermal Degradation Behavior ◽  
Thermal Stability Of

Chitosan possess many attractive properties for applying as biomaterials. For some application, biomaterial devices have to be sterilized using high temperature, e.g. stream sterilizing process. However, thermal degradation behavior of chitosan has been reported previously. Many researchers have attempted to improve thermal degradation behavior of chitosan by synthesize chitosan derivatives or blending chitosan with other polymers or additives. However, chitosan derivatives found to be less thermal stability than chitosan itself. On the contrary, adding some lipid additive could improve thermal stability of chitosan. In this study, protecting effect of aluminum monostearate (Alst) on thermal stability of chitosan was investigated employing thermal analysis techniques, e.g. thermogravimetry (TG), differential scanning calorimetry (DSC) and hot-stage microscope. Lactic acid solution (2% w/v) was used as solvent for dissolving chitosan. Chitosan solution, named as chtiosan-lactate (CL) and chitosan solution contained 2.5% w/w Alst (CLAlst) were prepared and fabricated into sponges using freeze drying technique. Degradation temperature of CLAlst system investigated from TG was shifted to the higher temperature comparing that of CL which indicated that Alst could improve thermal stability of chitosan after processed as biomaterial. From DSC result, small endothermic peak was observed around 60-70°C for CLAlst whereas that of CL did not exhibit any peak. Melting behavior of the sponges observed under hot-stage microscope was demonstrated that chitosan was decomposed whereas Alst dispersed in chitosan backbone was gradually melted.

scholarly journals Thermal degradation behavior and flammability of polyurethanes blended with poly(bispropoxyphosphazene)

1999 ◽  
Vol 66 (3) ◽  
pp. 307-315 ◽  
Author(s):  
Pin-Sheng Wang ◽  
Wen-Yen Chiu ◽  
Leo-Wang Chen ◽  
Bar-Long Denq ◽  
Trong-Ming Don ◽  
...  
Keyword(s):  
Thermal Degradation ◽  
Degradation Behavior ◽  
Thermal Degradation Behavior
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