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Is There any Relation Between the Solubility of a Polymeric Additive and its Performance as a Pour Point Reducer?
Author(s) -
Mansur Claudia R. E.,
Lima Aline F.,
Spinelli Luciana S.,
González Gaspar,
Lucas Elizabete F.
Publication year - 2006
Publication title -
macromolecular symposia
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.257
H-Index - 76
eISSN - 1521-3900
pISSN - 1022-1360
DOI - 10.1002/masy.200651335
Subject(s) - solubility , copolymer , materials science , hildebrand solubility parameter , reducer , cloud point , chemical engineering , polymer chemistry , organic chemistry , chemistry , polymer , aqueous solution , thermodynamics , composite material , physics , engineering
Abstract In this work, polymeric additives based on poly(ethylene‐co‐vinyl acetate) were chemically modified by inserting different contents of hydrocarbon chains (C14). The performance of the modified copolymers as organic deposition inhibitors (ODI) was evaluated using a model system composed of different types of paraffins by measuring the pour point and viscosity of these systems. The phase behavior of the modified copolymers was evaluated in systems with different solubility parameters in order to correlate the additive's performance as ODI and the esteem solubility parameter of these modified copolymers. The results show that the EVA modified copolymers performed better ODI than those obtained for non‐modified copolymer. However, the molecule must retain a hydrophobic‐lypophobic balance in order to keep its capacity to modify the paraffin crystal. Moreover, copolymers with similar solubility parameters did not present the same pour‐point values, which suggests that the solubility of the additive is important, but is not the only factor that influences the additive performance.