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- W2031569561 abstract "Structural changes are detected by x-ray diffractometry when a semicrystalline polyester of molecular weight of about 1000 having free carboxyl and hydroxyl end groups is reacted with MgO. The ratio of MgO to the COOH end groups alters the diffractograms. Supplementary structural studies were performed by various electron microscopic techniques. Differences were also detected in the supermolecular structure as a function of the MgO to COOH ratio. Furthermore, at the equivalent ratio a fiber-forming solution can be prepared; while the equimolar ratio results in a gel-like system. This is in accordance with our previous conclusions about the mechanism of the reaction (association), i.e., at a molar ratio of the COOH group to MgO of 2:1 (equivalent amounts) the forming of aCOO− Mg2+ −OOClinkage is preferred; while in the case of an equimolecular amount of COOH and MgO, the possibility of the association of other groups of the polyester chain (such as CO groups and alcoholic end groups) increases creating associates of greater size." @default.
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- W2031569561 date "2007-03-08" @default.
- W2031569561 modified "2023-09-23" @default.
- W2031569561 title "Metal-containing co-ordination polymers. VII. Studies on the structure of complexes formed in the reaction of a semicrystalline polyester with mgo" @default.
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- W2031569561 doi "https://doi.org/10.1002/polc.5070680107" @default.
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