Poly(phthalaldehyde), abbreviated as PPA, is a metastable stimuli-responsive polymer first synthesized in 1967. It has garnered significant attention during the past couple of years due to its ease of synthesis and outstanding transient and mechanical properties. for this reason, It has been exploited for a … See more Poly(phthalaldehyde) was first reported in 1967 by Chuji Aso and Sanae Tagami from the department of Organic Synthesis at Kyushu University by an addition homopolymerization reaction of aromatic o-phthalaldehyde (Figure … See more PPA is a metastable polymer known for its ease of synthesis and rapid depolymerization. In addition, its properties can be … See more Due to its unique stability, chemical properties, and outstanding tunability and reactivity, PPA has been employed in a variety of applications. See more Since its first inception in 1967, many synthesis techniques have been developed and employed for the polymerization of o-phthalaldehyde. Most notably, living polymerization methods are among the most common and promising techniques used, as can be … See more Depending on the polymerization technique applied, two different types of poly(phthalaldehyde) can be acquired, linear and cyclic (see Figure 1). In this section, the properties and characteristics of each type will be thoroughly depicted. Linear PPA See more According to the safety data sheet of PPA, it should not be allowed in contact with the skin or eyes as it may lead to skin, eye, and respiratory irritations or allergic reactions. In addition, as some … See more WebAug 2, 2024 · Rheology is used to demonstrate gelation within 5 s of light exposure of the allylated-phthalaldehyde polymers reacted with pentaerythritol tetrakis(3 …
Functional Phthalaldehyde Polymers by Copolymerization …
WebPoly(phthalaldehyde) [PPA] (0.20 g) is weighed into a Schlenk flask and dissolved in dichloromethane (2 mL). The solution is cooled to -78 °C and boron trifluoride etherate is … Webo-Phthalaldehyde is, to this day, the only aromatic aldehyde that can be homopolymerized through chain-growth polymerization.The product, polyphthalaldehyde (PPA), is a brittle … heating foot spa
[PDF] Cationic polymerization of high-molecular-weight phthalaldehyde …
WebJan 12, 2015 · In this study, we compare the transfer of graphene with the conventional PMMA polymer scaffold with alternative poly (lactic acid) (PLA), poly (phthalaldehyde) (PPA), PC, and bilayer PMMA/PC scaffolds. We choose both PLA and PPA as scaffolds as they can supposedly be removed by modest heating or acid exposure. WebApr 8, 2013 · This review highlights the unique polymerization chemistry of o-phthalaldehyde since its discovery over half a century ago, describing the different methods for the preparation of PPA and its ... WebFeb 9, 2009 · Corresponding Author. Stefan Köstler. [email protected]; Institute of Chemical Process Development and Control, Joanneum Research, Steyrergasse 17, 8010 Graz, Austria heating foot pad mat