Journal ArticleDOI
Influence of intermolecular interactions on the melt rheology of a propylene–acrylic acid copolymer and its salts
R. A. Weiss,P. K. Agarwal +1 more
TLDR
In this article, the properties of propylene-acrylic acid copolymer copolymers have been studied and their rheological behavior has been investigated. And the results are a consequence of intermolecular interactions between salt groups for the metal acrylate derivatives and hydrogen bonding for acid derivatives.Abstract:
Ionomers based on propylene-acrylic acid copolymer have been prepared and their rheological behavior studied. With different cations the melt viscosity at any shear rate increases as tributylamine salt < acid < zinc salt < sodium salt. Similarly, the activation energies for viscous flow follow the order polypropylene - tributylamine salt < acid - zinc salt < sodium salt. These results are a consequence of intermolecular interactions between salt groups for the metal acrylate derivatives and hydrogen bonding for the acid derivatives. Strong ionic interactions are absent in the tributylamine salt because of steric hindrance of the bulky amine substituents. The glass transition temperatures for these materials were equivalent. The elastic properties of these polymers follow a similar trend as does the viscosity.read more
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Journal ArticleDOI
Perspective: Ionomer Research and Applications
TL;DR: Ionomers are polymers with bonded ionic species that are used under conditions where the salt groups are in a condensed state as mentioned in this paper, and are used for shape memory and self-healing materials and supramolecular polymer systems.
Journal ArticleDOI
Counterion dynamics in polyurethane-carboxylate ionomers with ionic liquid counterions
TL;DR: In this article, polyurethane carboxylate ionomers based on poly(ethylene glycol) (Mn = 600) with sodium and various ammonium, phosphonium and imidazolium cations are synthesized for systematic comparison of different cationic counterions.
Journal ArticleDOI
Rheological behavior of oligomeric ionomers
Robert Weiss,Hongying Zhao +1 more
TL;DR: In this article, the rheological behavior of the alkali metal salts of oligomeric sulfonated polystyrene (PS) ionomers was characterized using dynamic and steady shear measurements.
Journal ArticleDOI
Crystallization kinetics of maleic anhydride grafted polypropylene ionomers
Jian Yu,Jiasong He +1 more
TL;DR: In this article, the authors investigated the crystallization kinetics of pure polypropylene (PP) and these ionomers under isothermal and non-isothermal conditions, and they showed that the introduction of pendant groups along the PP chains increases the crystallisation rate and does not influence the crystal mode.
Journal ArticleDOI
High melt strength polypropylene by ionic modification: Preparation, rheological properties and foaming behaviors
Yan Li,Yan Li,Yan Li,Zhen Yao,Zhen-hua Chen,Zhen-hua Chen,Shao-long Qiu,Changchun Zeng,Changchun Zeng,Kun Cao +9 more
TL;DR: A facile process to introduce ionic interactions to polypropylene (PP) based on Zn neutralization and amine modification reactions of maleic anhydride grafted PP (PP-g-MAH) for the preparation of high melt strength polypropylenes was reported in this article.
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