Novel High-Temperature Aromatic Copolyester Thermosets:  Synthesis, Characterization, and Physical Properties

Frich, Dan; Goranov, Konstantin; Schneggenburger, Lizabeth A.; Economy, James

doi:10.1021/ma960862d

Cited by 69 publications

(52 citation statements)

References 17 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…Free mixing and sintering with PTFE at normal processing parameters for PTFE is possible while blends form two continuous interpenetrating networks with fully combined parts. Early research on ATSP/PTFE composites [16] showed that ATSP prepared by a conventional two-step method could improve the mechanical properties of PTFE, which was also observed in this work. The samples of ATSP/PTFE used for the tribological experiments, were fabricated with different weight ratios of 75/25, 50/50, and 25/75, and for simplicity designated as compositions C1, C2, and C3, respectively.…”

Section: Samplessupporting

confidence: 78%

Tribological Characterization of Aromatic Thermosetting Copolyester–PTFE Blends in Air Conditioning Compressor Environment

et al. 2008

Self Cite

View full text Add to dashboard Cite

The tribological behavior of a wide range of compositions using blends of aromatic thermosetting polyester (ATSP) with polytetrafluoroethylene (PTFE) has been investigated. PTFE was chosen as the blending material because of its low coefficient of friction and good performance at high temperatures and resistance to chemicals. ATSP blends were used to specifically combat some of the shortcomings of PTFE like its extremely low wear resistance and poor mechanical properties, and special processing requirements due to its high melt viscosity. Controlled tribological experiments simulating an air conditioning compressor operating with R134a refrigerant under realistic operating conditions were carried out with different ATSP/PTFE compositions, as well as four different state-of-the-art commercially available composites containing carbon fibers, graphite and PTFE. It was found that the newly synthesized composites exhibited superb tribological characteristics as far as low friction and low wear were concerned. The wear performance of PTFE was greatly improved, while it was shown that greater amounts of ATSP used in the blend lead to lower wear and the amount of ATSP did not significantly alter the friction coefficient. Material transfer and development of a weak film on the disk surface was observed, especially for the blends with higher PTFE content.

show abstract

Section: Samplessupporting

confidence: 78%

Tribological Characterization of Aromatic Thermosetting Copolyester–PTFE Blends in Air Conditioning Compressor Environment

et al. 2008

Self Cite

View full text Add to dashboard Cite

show abstract

“…In our previous publications, 12,18,19 it was reported that both liquid crystalline polyesters (LCP) and ATSP can form good adhesive bonds by heating at temperatures of 260 -320°C and applying some pressure. In the case of the LCP, rather modest lap shear strength was observed of 10 MPa.…”

Section: Adhesion Characteristics Of Atsp (Background)mentioning

confidence: 99%

“…This led to the dis- covery of ATSP, a new family of thermosets with a number of unique properties. 19 Previously, ATSP was investigated as a high-temperature structural adhesive. 17 The substrate was first coated from the ATSP oligomer melt, obtained by heating the oligomer mixture to 200°C.…”

Section: Adhesion Characteristics Of Atsp (Background)mentioning

confidence: 99%

Adhesion mechanisms in the solid‐state bonding technique using submicrometer aromatic thermosetting copolyester adhesive

Selby

Shannon

et al. 2004

J of Applied Polymer Sci

Self Cite

View full text Add to dashboard Cite

ABSTRACT:The adhesion mechanism between polyimides and aromatic thermosetting copolyester (ATSP) involved in the solid-state bonding technique using submicrometer ATSP coatings was evaluated. The adhesion strength at the interface between ATSP and polyimide is strongly related to the diffusion of ATSP into the polyimide base layer. We used dynamic secondary ion mass spectrometry to study the interface width between deuterated ATSP and polyimides and found that the interface between ATSP and poly(4,4Ј-diphenylether pyromellitimide) (PMDA-ODA) is wider than the interface between ATSP and poly(pphenylene biphenyltetracarboximide) (BPDA-PPD) because of the less rigid chain in the PMDA-ODA. By partially curing both polyimides, the interface width was greatly increased, which could lead to an improved adhesion at the interface between polyimide BPDA-PPD and ATSP. © 2004 Wiley Periodicals, Inc. J Appl Polym Sci 92: [3843][3844][3845][3846][3847][3848][3849][3850][3851][3852][3853][3854][3855][3856] 2004

show abstract

“…These materials have excellent thermal stability (up to 350°C in air and 425°C in nitrogen environments), good chemical resistance, excellent mechanical properties, good creep and wear resistance, excellent adhesion to various substrates, and the ability to form a strong adhesive bond between two cured surfaces through an interchain transesterification reaction (ITR) at the interface [4]. Earlier research has reported that ATSP exhibits very good adhesion to different metal surfaces.…”

Section: Introductionmentioning

confidence: 99%

An Improved Tribological Polymer-Coating System for Metal Surfaces

2010

Self Cite

View full text Add to dashboard Cite

Aromatic thermosetting polyester (ATSP)-and polytetrafluoroethylene (PTFE)-blended composites have been shown to exhibit improved tribological performance with low wear and low friction. In this article, pure ATSP films were coated on aluminum substrates and tested as a potential protective tribological coating. The tribological performance of this coating was tested against steel, using pure sliding sphere-on-disk experiments. A fluoroadditive powder (solid lubricant) was also added to further enhance the ATSP film wear and friction properties. For comparison, a commercially available PTFE-based coating was tested under the same conditions. Results show that the ATSP/fluoroadditive film has comparable coefficient of friction to the commercial coating, but significantly lower wear. Surface analysis techniques were employed to investigate the low-friction and low-wear mechanisms seen with the ATSP/fluoroadditive. Specifically TOF-SIMS depth-profiling showed that there is a high density of fluorine element within the wear track and penetrates well below the surface of the wear track.

show abstract

Novel High-Temperature Aromatic Copolyester Thermosets: Synthesis, Characterization, and Physical Properties

Cited by 69 publications

References 17 publications

Tribological Characterization of Aromatic Thermosetting Copolyester–PTFE Blends in Air Conditioning Compressor Environment

Tribological Characterization of Aromatic Thermosetting Copolyester–PTFE Blends in Air Conditioning Compressor Environment

Adhesion mechanisms in the solid‐state bonding technique using submicrometer aromatic thermosetting copolyester adhesive

An Improved Tribological Polymer-Coating System for Metal Surfaces

Contact Info

Product

Resources

About