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Polyethylenimine (PEI) or polyaziridine is a polymer with repeating units composed of the amine group and two carbon aliphatic CH 2 CH 2 spacers. Linear polyethyleneimines contain all secondary amines, in contrast to branched PEIs which contain primary, secondary and tertiary amino groups.
Polyetherimide (PEI; branded as Ultem [1]) is an amorphous, amber-to-transparent thermoplastic with characteristics similar to the related plastic PEEK. When comparing PEI to PEEK, the former is cheaper but has lower impact strength and a tighter temperature range.
On the October earnings call, Musk said that Tesla does plan a “$25K car” – its “Cybercab,” a two-door, two-seat, fully autonomous vehicle. Musk unveiled a prototype at a Hollywood-style ...
[15] 5 Su-25K and 1 Su-25UBK in service as of 2024. [16] Chad. The Chadian Air Force took delivery of six aircraft (four Su-25s and two Su-25UBs) from Ukraine between 2008 and 2010. Four additional aircraft were delivered from Ukraine in 2013. [17] Democratic Republic of the Congo. Air Force of the Democratic Republic of the Congo.
Later on, Xi'an Aero-Engine Corporation, which had also participated in the localisation process of the GT-25000, wanted to take over the military market from CSIC's GT-25000 and unveiled the QC-280/QD-280 series, which has essentially identical performance with the GT-25000 but named differently for IP reasons.
Polydiallyldimethylammonium chloride (shortened polyDADMAC or polyDDA), also commonly polyquaternium-6, is a homopolymer of diallyldimethylammonium chloride (DADMAC). The molecular weight of polyDADMAC is typically in the range of hundreds of thousands of grams per mole, and even up to a million for some products.
An evacuation order has been lifted after a lithium-ion battery fire broke out at a power plant facility in Central California Thursday night, officials said Friday. “In an abundance of caution ...
This is a list of power stations in Prince Edward Island, Canada.. Prince Edward Island has eight power stations, and is the only Canadian province without an active hydroelectric power station (the last, Knox's Dam [which?] ended commercial operation in the 1950s [1]).