Oligomer Formation During the Copolymerization of Styrene and Maleic Anhydride

1991 ◽  
pp. 100-103 ◽  
Author(s):  
Bert Klumperman ◽  
Pierre Smids ◽  
Martin van Duin
Keyword(s):  
Maleic Anhydride ◽  
Oligomer Formation

Review on the Application of Mixed-mode Chromatography for Separation of Structure Isoforms

2018 ◽  
Vol 20 (1) ◽  
pp. 56-60 ◽  
Author(s):  
Tsutomu Arakawa
Keyword(s):  
Ion Exchange ◽  
Mixed Mode ◽  
Ion Exchange Chromatography ◽  
Exchange Chromatography ◽  
Charged State ◽  
Partial Structure ◽  
Reverse Phase ◽  
Oligomer Formation ◽  
Structure Rearrangement ◽  
Disulfide Scrambling

Proteins often generate structure isoforms naturally or artificially due to, for example, different glycosylation, disulfide scrambling, partial structure rearrangement, oligomer formation or chemical modification. The isoform formations are normally accompanied by alterations in charged state or hydrophobicity. Thus, isoforms can be fractionated by reverse-phase, hydrophobic interaction or ion exchange chromatography. We have applied mixed-mode chromatography for fractionation of isoforms for several model proteins and observed that cation exchange Capto MMC and anion exchange Capto adhere columns are effective in separating conformational isoforms and self-associated oligomers.

Reactions of macroions with ester and carboxylic groups of polymers

1987 ◽  
Vol 52 (9) ◽  
pp. 2194-2203
Author(s):  
Miloslav Kučera ◽  
Dušan Kimmer ◽  
Karla Majerová ◽  
Josef Majer
Keyword(s):  
Maleic Anhydride ◽  
Acrylic Acid ◽  
Methyl Methacrylate ◽  
Bond Formation ◽  
Covalent Bond ◽  
The Other ◽  
Poly Methyl Methacrylate ◽  
Other Hand ◽  
Carboxylic Groups ◽  
Poly Acrylic Acid

In the reaction of dianions with poly(methyl methacrylate), only an insignificant amount of insoluble crosslinked product is obtained. If, however, the concentration of grafting dianions approaches that of ester groups, the amount of poly(methyl methacrylate) which may thus be crosslinked becomes quite significant. Dications, too, can bring about crosslinking of only an insignificant number of poly(methyl methacrylate) chains. Carboxylic groups in poly(acrylic acid) react with dianions and dications in an anhydrous medium similarly to ester groups. On the other hand, in the presence of a cocatalytic amount of water dications are more readily bound to carboxylic groups, forming a covalent bond. The relatively highest efficiency was observed in the bond formation between dication and the poly[styrene-alt-(maleic anhydride)], both in an anhydrous medium and in the presence of H2O.

Properties of Biobased Epoxy Resins from Epoxidized Soybean Oil (ESBO) Cured with Maleic Anhydride (MA)

2012 ◽  
Vol 89 (11) ◽  
pp. 2067-2075 ◽  
Author(s):  
J. M. España ◽  
L. Sánchez-Nacher ◽  
T. Boronat ◽  
V. Fombuena ◽  
R. Balart
Keyword(s):  
Maleic Anhydride ◽  
Soybean Oil ◽  
Epoxy Resins ◽  
Epoxidized Soybean Oil

Synthesis and ethylene-promoted metathesis of adducts of tandem [4+2]/[4+2] cycloaddition between bis-furyl dienes and maleic acid derivatives

2021 ◽  
Vol 45 (7) ◽  
pp. 3400-3407
Author(s):  
Elizaveta A. Kvyatkovskaya ◽  
Polina P. Epifanova ◽  
Eugeniya V. Nikitina ◽  
Aleksey A. Senin ◽  
Victor N. Khrustalev ◽  
...  
Keyword(s):  
Maleic Anhydride ◽  
Maleic Acid

A series of 1,4:5,8-diepoxynaphthalenes, annellated with carbo- and heterocycles, was synthesized based on the tandem intermolecular/intramolecular [4+2] cycloaddition of bis-furyl dienes with moderately to highly reactive cyclic dienophiles (maleic anhydride and maleinimides).

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