Original Synthesis of Ethylene‐Acrylic Acid (ester) Copolymers Derivatives from 5‐substituted Cyclooctenes with A Controllable Way Via Ring‐Opening Metathesis Polymerization

Abstract

High‐value grades of ethylene‐acrylic acid (EAA) and ethylene‐acrylic ester copolymers have been producing from ethylene, acrylic acid (AA) and the alcohol derivative via radical reaction in autoclave reactor at temperature of 150–230 °C and pressure of 150–300 MPa. In this paper, EAA and its ester derivatives were originally created from the 5‐substituted cyclooctenes (COE) with side chains of carboxylic acid or ester derivatives by ring‐opening metathesis polymerization at normal temperature and pressure. Especially, the controllable insertion of side chain groups in copolymers was effectively achieved by altering the molar ratio of COE and 5‐substituted COE. What's more, the polar carboxyl groups (ester groups) had a detrimental effect on the order assigns of the linear backbone and thus hindered crystallization, indicating relatively lower crystallizing and melting temperature with an increase in the content of side chain. As the amounts of polar groups raised, the stiffness of chain segments enhanced, thereby leading to an elevation in the copolymer's energy storage modulus (E') and glass transition temperature (Tg). Moreover, the Flynn‐Wall‐Ozawa (FWO) technique was employed to characterize and fit the non‐isothermal crosslinking kinetics of the ethylene‐acrylic ester copolymer derivatives, and the crosslinking activation energy was determined to lie between 97 to 140 kJ/mol.This article is protected by copyright. All rights reserved

New homopolymers and copolymers based on 5-succinyl cyclooctene and mono-substituted ethylene glycols

“…The first monomer was converted into an insoluble product, which can be obtained by dimerization of end COOH groups due to H-bonding. 59 Three other polymerizations yielded new homopolymers PCO1, PCO2, and PCO3, and all were soluble in CHCl 3 and THF and insoluble in hydrocarbons; PCO1 was soluble in ethyl acetate and toluene, and PCO3 was soluble in methanol, ethanol, and acetone. PEG356-based PCO3 was also apparently soluble in water, where it formed a micellar dispersion that was transparent at room temperature but became cloudy upon heating to 40 °C.…”