Saed, Mohand O. published the artcileDynamic Semicrystalline Networks of Polypropylene with Thiol-Anhydride Exchangeable Crosslinks, Related Products of alcohols-buliding-blocks, the main research area is semicrystalline network polypropylene thiolanhydride exchangeable crosslink; 3D printing; plastic recycling; polypropylene; thermoplastic; thiol-anhydrate; thiol-thioester; vitrimer.
Thermoplastic polyolefins (TPOs) crosslinked by dynamic covalent bonds (xTPOs) have the potential to be the most utilized class of polymer in the world, with applications ranging from household and automotive to biomedical devices and additive manufacturing xTPO combines the benefits of thermoplastics and thermosets in a “”single material”” and potentially avoids their shortcomings. Here, we describe a new two-stage reaction extrusion strategy of TPOs with a backbone consisting of inert C-C bonds (polypropylene, PP), and thiol-anhydride, to dynamically crosslink PP through thiol-thioester bond exchange. The degree of PP crosslinking determines the rubber plateau modulus above the m.p. of the plastic: the modulus at 200°C increases from zero in the melt to 23 kPa at 6% crosslinking, to 60 kPa at 20%, to 105 kPa at 40%. The overall mech. strength of the solid xTPO plastic is 25% higher compared to the original PP, and the gel fraction of xTPO reaches 55%. Finally, we demonstrate that the crosslinked xTPO material is readily reprocessable (recycled, remolded, rewelded, and 3D printed).
ACS Applied Materials & Interfaces published new progress about Crosslinking. 7575-23-7 belongs to class alcohols-buliding-blocks, name is Pentaerythritol tetra(3-mercaptopropionate), and the molecular formula is C17H28O8S4, Related Products of alcohols-buliding-blocks.
Referemce:
Alcohol – Wikipedia,
Alcohols – Chemistry LibreTexts