Polyphthalaldehyde
WebJul 1, 2024 · Abstract. Background: Polyphthalaldehyde (PPA)-based systems can be interesting candidates for extreme ultraviolet (EUV) lithography as dry development resists with simple chemistry. Aim: We present EUV-induced mechanistic and contrast curve studies for the end-capped PPA. Approach: Fourier transform infrared (FTIR) … WebPolymers that depolymerize back to monomers can be repeatedly chemically recycled, thereby reducing their environmental impact. Polyphthalaldehyde is a metastable polymer …
Polyphthalaldehyde
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WebJan 1, 2016 · Liftoff pattern transfer, (A) substrate, (B) liftoff layer, and (C) polyphthalaldehyde layer. Polymethylglutarimide (PMGI) and PMMA have successfully been used. In general, the solvent for the PPA should not dissolve the polymer of the liftoff layer to prevent contamination, though there is a bit of tolerance. WebPolyphthalaldehyde is a metastable polymer that can rapidly and quantitatively depolymerize due to its low ceiling temperature. However, the effect of substitution on the …
WebEnd-capped polyphthalaldehyde is a stable, low ceiling temperature polymer whose films can be directly exposed with UV, X-ray or e-beam radiation to give spontaneously developed images. 42 The photolysis of an acid-generating species such as iodonium or sulfonium salts in polyphthalaldehyde film results in a very facile degradation, ... WebAmazon Web Services, Inc.
WebAccelerated Thermal Depolymerization of Cyclic Polyphthalaldehyde with a Polymeric Thermoacid Generator Macromol Rapid Commun . 2024 Jun;39(11):e1800046. doi: … WebThe technique is based on a thermally activated and self-developed cyclic polyphthalaldehyde (c-PPA) resist using a commercial Raman system and 532 nm laser illumination. Following the successful customization of electrodes to form field effect transistors based on MoS2 monolayers, the laser-induced electronic doping of areas …
WebThis work deals with the synthesis and characterization of new diblock copolymers based on π-conjugated and depolymerizable units. These diblock copolymers are based on a regioregular poly(3-hexylthiophene) sequence associated with a sacrificial block, namely polyphthalaldehyde. The conjugated polymer was obtained by Grignard metathesis …
WebJul 14, 2024 · Background: Polyphthalaldehyde (PPA)-based systems can be interesting candidates for extreme ultraviolet (EUV) lithography as dry development resists with … kitchen backsplash that looks like brickWebNov 1, 2024 · Polyphthalaldehyde (PPA) microcapsules from which immediate release could be UV-triggered were formulated. Using a UV-responsive system enabled a remote … kitchen backsplash tile ceramic reliefWebSep 3, 2024 · Noncovalent adhesion has long been developed for numerous applications, including pressure-sensitive adhesives, wound closure, and drug delivery. Recent advances highlight an urgent need: a general principle to guide the development of instant, tough, noncovalent adhesion. Here, we show that noncovalent adhesion can be both instant and … kitchen backsplash tile blue gray whiteWebThe product, polyphthalaldehyde (PPA), is a brittle white solid, and, having a polyacetal main chain, presents the ability to depolymerize quite rapidly in the presence of an acid. This … kitchen backsplash tile 2021WebAug 7, 2013 · Polyphthalaldehyde is a metastable polymer that can rapidly and quantitatively depolymerize due to its low ceiling temperature. However, the effect of … kitchen backsplash tile and mosaicsWebSep 18, 2024 · Polyphthalaldehyde is a metastable polymer that can rapidly and quantitatively depolymerize due to its low ceiling temperature. However, the effect of … kitchen backsplash tile blue and whiteWebPolymers that depolymerize back to monomers can be repeatedly chemically recycled, thereby reducing their environmental impact. Polyphthalaldehyde is a metastable polymer that is rapidly and quantitatively depolymerized due to its low ceiling temperature. However, the effect of substitution on the physical and chemical properties of polyphthalaldehyde … kitchen backsplash tile beige