Estimation of Glass Transition Temperatures from Gas Chromatographic Studies on Polymers

1973 ◽  
Vol 46 (1) ◽  
pp. 1-6 ◽  
Author(s):  
A. Lavoie ◽  
J. E. Guillet
Keyword(s):  
Glass Transition ◽  
Retention Volume ◽  
Polymeric Materials ◽  
Similar Data ◽  
Transition Temperatures ◽  
Gas Chromatograph ◽  
Specific Retention Volume ◽  
Glass Transition Temperatures ◽  
Reciprocal Temperature ◽  
Specific Retention

Abstract In a recent communication, Smidsrød and Guillet showed that thermodynamic data on the interactions between poly (isopropylacrylamide) and various gaseous solutes could be obtained by making the polymer the stationary phase in a gas Chromatograph. It was also shown that if a solute was used which was a nonsolvent for the polymer, a plot of the logarithm of the specific retention volume as a function of reciprocal temperature showed a marked inflection at a temperature close to the glass transition temperature for the polymer. We wish to report similar data on several additional polymers which lead us to believe that the phenomenon is a general one and may be used to obtain an estimate of transition temperatures for a variety of polymeric materials.

Polymeric Materials Requirements for the GE High-Density Interconnect Process

1992 ◽  
Vol 264 ◽  
Author(s):  
H.S. Cole ◽  
B. Gorowitz ◽  
T. Gorczyca ◽  
R. Wojnarowski ◽  
J. Lupinski
Keyword(s):  
Glass Transition ◽  
Polymeric Materials ◽  
High Density ◽  
Transition Temperatures ◽  
Materials Development ◽  
Glass Transition Temperatures

AbstractIn the GE High-Density Interconnect Process, thermoplastic polyetherimide adhesives with selectively variable glass transition temperatures (Tg's) are used as chip attach and overlay adhesive. Alternating layers of patterned metal and dielectric are then applied to fabricate the interconnect structure. Upper layer dielectrics are formed using a modified siloxane-polyimide that can be processed at temperatures below 200 °C. The unique materials requirements and materials development issues associated with this approach are discussed.

Properties of Random PSF/PES Copolymers as High-Performance Polymers

2011 ◽  
Vol 217-218 ◽  
pp. 1606-1610
Author(s):  
Dong Jiang ◽  
Xiao Ran Zhang ◽  
Yan Mei Ma ◽  
Cheng You Ma
Keyword(s):  
Weight Loss ◽  
Tensile Strength ◽  
Glass Transition ◽  
High Performance ◽  
Molar Ratio ◽  
Transition Temperatures ◽  
Elongation At Break ◽  
Glass Transition Temperatures ◽  
High Performance Polymers ◽  
Diphenyl Sulfone

A series of random polysulfone/polyethersulfone (PSF/PES) copolymers were synthesized by the polycondensation of 4, 4'-isopropylidendiphenol, 4, 4΄-dihyolroxy diphenyl sulfone and 4, 4'-dichlorodiphenyl sulfone in the presence of K2CO3. We obtained a series of copolymers by changing the molar ratio of 4, 4΄-dihyolroxy diphenyl sulfone and 4, 4'-isopropylidendiphenol (it was marked as the ratio of S:A). The copolymers have the similar solubility with polyethersulfone. They also have high glass transition temperatures (Tg: 199°C~229°C) and 5% weight loss temperatures (4, 4'-isopropylidendiphenol: 4, 4΄-dihyolroxy diphenyl sulfone=1:1, Td5=497°C). At the same time the elongation at break is much higher than that of PES, while the tensile strength is a little lower than that of PES.

Sign in / Sign up

Export Citation Format

Share Document