Poly piperazine containing

Michael addition of amines to bis(acrylamides) has provided a versatile method for the preparation of poly(amidoamines) (70MH1102). A wide variety of piperazine-containing polyamides may be prepared by this route when a piperazine, 1,4-diacryloylpiperazine... 

Phosphorus containing poly(maleimide-amines) were synthesized from N,N -bisdichloromaleimido-3,3 -diphenyl alkylphosphine oxides and aromatic diamines or piperazine [144]. The polymers prepared from piperazine are soluble in DMF, DM AC, DMSO, etc., but have poor thermal stability and flame retardancy. 

Langer [3] coupled 1,4-butanediol diacrylate with poly(A, A -dimethylethyl-enediamine), (III), piperazine, and 4,4 -trimethylenedipiperidine to prepare poly(p-amino esters) that were particularly suited for the delivery of polynucleotides. Nanoparticles containing polymer/polynucleotide complexes were also prepared. Hubbell [4] and Zhao [5] prepared polymeric biomaterials by the nucleophilic addition of cysteine, (IV), and polyethylenimine, (V), respectively, to cx,p-unsaturated macromolecular diacrylates. 

Oligomer 163 represents a stabilizer having PA chain with pendant phenolic moiety [31], Pendant hindered piperidine or piperazine moieties were attached to oligomeric stabilizers having polysulfonamide, polyurea (e.g. 164), or PA (e.g. 165) unis [213]. Polyhydrazide 166 was tested as HD AO and copper deactivator in PP [214]. Poly (nitrophenylene-carbazide disulfide) 167 was prepared for thermal stabilization of PVC. Phosphorus containing crosslinkable polymers having polyamide, polyimide and polyurea chains were prepared for flame and heat resistant applications [215]. 

Enamine carbonyl hydrogen bonding ring containing polymers can be made several ways. In the case of poly(amide enamine) prepared from piperazine no mesogenic character was observed. The new materials reported, synthesized... 

An obvious need exists for membranes with improved permeability and permselectivity. In addition to several earlier pieces of work contained in ref. Zg and Zh studies involving radiation-modified poly(vinyl alcohol) ordered polycarbonates " and cellulosic ion-exchange membranes have been reported. A variety of reports have appeared of the evaluation of existing polymers, such as polysulphone, in biomedical applications for which they have not previously been used, and of the synthesis of new polymers which may find use in the biomedical area. Examples include polyorganophosphazenes, biodegradable poly(ethyene oxide)-poly(ethylene terephthalate) copolymers, collagen copolymers, block copolymers of l,4-bis(acryloyl) piperazine-AW -dimethylethylene diamine and styrene, and >olymers derived fi om a miscellany of heterocyclic monomers. Information on chemically modified polymers designed for biomedical use is also contained in Chapter 16 of this Volume. 

So, piperazine is less efficient as a curing agent for poly(VDF-co-HFP) copolymer, whereas 2,5-dimethyl piperazine [18] produces well-cured vul-canizates from stocks which are less toxic than those containing HMDA-C. 

Up to this point, solely low molecular weight alcohols were used nevertheless, polymeric hydroxyl side chains can also be successfully modified. Khan and coworkers used a hydroxyl-containing poly condensate, which was derived from piperazine and 2,2 -[butane-l,4-diylbi(oxymethanediyl)]dioxirane, as starting polymer (Scheme 8) [14]. Tricyclo[3.3.1.1]decane-l-carbolyl chloride could be attached onto these poly(p-hydroxy amines). By acidic treatment, the backbone amine units were protonated and transformed the main chain into a cationic polymer system. The introduced monoadamantyl moiety could then be selectively linked to p-cyclodextrin units to create graft polymers. 

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