Degradable Rosin-Ester–Caprolactone Graft Copolymers

2011 ◽  
Vol 12 (6) ◽  
pp. 2171-2177 ◽  
Author(s):  
Kejian Yao ◽  
Jifu Wang ◽  
Wujie Zhang ◽  
James S. Lee ◽  
Chunpeng Wang ◽  
...  
Keyword(s):  
Graft Copolymers ◽  
Rosin Ester

Preparation of graft copolymers by the reaction of polymeric acyl chlorides with monohydroxy-terminated polymers: An introductory study

1988 ◽  
Vol 53 (8) ◽  
pp. 1735-1744 ◽  
Author(s):  
Jitka Horská ◽  
Jaroslav Stejskal ◽  
Pavel Kratochvíl ◽  
Aubrey D. Jenkins ◽  
Eugenia Tsartolia ◽  
...  
Keyword(s):  
Light Scattering ◽  
Chemical Composition ◽  
Statistical Model ◽  
Graft Copolymers ◽  
Coupling Reaction ◽  
Molecular Characteristics ◽  
Gel Formation ◽  
Acyl Chlorides ◽  
Molecular Weights

An attempt was made to prepare well-defined graft copolymers by the coupling reaction between acyl chloride groups located along the backbone chain and monohydroxy-terminated grafts prepared separately. The molecular weights and the parameters of heterogeneity in chemical composition of the products were determined by light scattering and osmometry. The determination of molecular characteristics revealed that the degree of grafting was low. The results therefore could not be confronted with a statistical model at this stage. The problems encountered in the synthesis, e.g., gel formation, and the data relating to the soluble products are discussed.

Association of Graft Copolymers of Alkyl Methacrylates with α-Methyl-ω-hydroxy-poly(oxyethylene) ethacrylates

1995 ◽  
Vol 60 (11) ◽  
pp. 1971-1985 ◽  
Author(s):  
Čestmír Koňák ◽  
Zdeněk Tuzar ◽  
Pavla Kopečková ◽  
Joseph D. Andrade ◽  
Jindřich Kopeček
Keyword(s):  
Light Scattering ◽  
Graft Copolymers ◽  
Water Solution ◽  
Pure Water ◽  
Solution Properties ◽  
Monomer Composition ◽  
Special Procedure ◽  
Methyl Cellosolve ◽  
Hexyl Methacrylate ◽  
Alkyl Methacrylates

Solution properties of the statistical copolymers of alkyl methacrylates (AMA) with α-methyl-ω-hydroxy-poly(oxyethylene) methacrylates (MPOEMA) (nonionic polysoaps) were studied using static and dynamic ligh scattering as a function of monomer composition and concentration in aqueous and methyl cellosolve solutions. The solubility of the copolymers in water was found to be dependent on molar contant of AMA. While copolymers with low content of hexyl methacrylate (HMA) (0 and 20 mole %) were directly soluble in water, forming true solutions with a low content of large swollen aggregates, copolymers with a higher content of HMA or lauryl methacrylate (LMA) were not directly dispersable in water. A special procedure, the stepwise dialysis from methyl cellosolve solutions against water, had to be used to prepare them in the pseudomicellar form. The copolymers were directly soluble in methyl cellosolve and its water solution containing up to 60 vol.% of water. Nevertheless, the light scattering experiments were dominated by light scattering of swollen particles of aggregated copolymer molecules. The copolymers were not soluble in the mixtures containing 70-100 vol.% of water. Paramaters of aggregates in the mixture with 60 vol.% of water and in pure water were found to be very similar.

Cationic modifications of polyalkenes II. Effect of a single or continuous supply of Co-initiator

1989 ◽  
Vol 54 (5) ◽  
pp. 1269-1275
Author(s):  
Miloslav Kučera ◽  
Dušan Kimmer ◽  
Karla Majerová ◽  
Zdeněk Fiala
Keyword(s):  
Isotactic Polypropylene ◽  
Graft Copolymers ◽  
Single Addition

For an effective modification of polyalkenes leading to the formation of block and/or graft copolymers, the presence of co-initiating water is absolutely necessary. We have compared two procedures used in the co-initiation of cationic reactions on polymers. Gradually supplied air moisture raises the efficiency of modification of isotactic polypropylene with poly(oxyethylene) several times, compared with a single addition of co-initiating water.

scholarly journals Triple‐Responsive Polyampholytic Graft Copolymers as Smart Sensors with Varying Output

2020 ◽  
pp. 2000671
Author(s):  
Johannes B. Max ◽  
Afshin Nabiyan ◽  
Jonas Eichhorn ◽  
Felix H. Schacher
Keyword(s):  
Graft Copolymers ◽  
Smart Sensors

Amphiphilic Graft Copolymers Capable of Mixed-Mode Interaction as Alternative Nonviral Transfection Agents

2021 ◽  
Vol 4 (2) ◽  
pp. 1268-1282
Author(s):  
Ivonne L. Diaz Ariza ◽  
Valérie Jérôme ◽  
León D. Pérez Pérez ◽  
Ruth Freitag
Keyword(s):  
Mixed Mode ◽  
Graft Copolymers ◽  
Mode Interaction ◽  
Amphiphilic Graft Copolymers ◽  
Nonviral Transfection

scholarly journals Synthesis of Maleic-Modified Rosin Ester from Pine Rosin

2021 ◽  
Vol 1143 (1) ◽  
pp. 012071
Author(s):  
Tirto Prakoso ◽  
Ihda Kumalasari ◽  
Bramantha Jiwandaru ◽  
Tatang Hernas Soerawidjaja ◽  
Muhammad Mufti Azis ◽  
...  
Keyword(s):  
Rosin Ester

Block and graft copolymers based on cationic ring-opening polymerizations

1992 ◽  
Vol 64 (1) ◽  
pp. 113-120 ◽  
Author(s):  
Eric J. Goethals ◽  
Veska Toncheva ◽  
Fried'l Hosteaux ◽  
Saskia Walraedt ◽  
Ronny de Clercq
Keyword(s):  
Ring Opening ◽  
Graft Copolymers
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