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Synthesis of stereoregular poly[(2 S ,3 S )‐benzyl β‐3‐methylmalate]
Author(s) -
Mabille Christine,
Masure Michèle,
Hémery Patrick,
Guérin Philippe
Publication year - 1996
Publication title -
macromolecular rapid communications
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.348
H-Index - 154
eISSN - 1521-3927
pISSN - 1022-1336
DOI - 10.1002/marc.1996.030170403
Subject(s) - tacticity , copolymer , crystallinity , polymerization , polymer chemistry , solubility , materials science , polymer , lactone , chemistry , organic chemistry , composite material
The asymmetric lactone (3 S , 4 R )‐3‐methyl‐4‐benzyloxycarbonyl‐2‐oxetanone ( 6 ) was anionically polymerized to give an insoluble, crystalline, highly isotactic polymer with (2 S , 3 S )‐benzyl β‐3‐methylmalate repeating units. Solubility was achieved by copolymerization of 6 with the recemic ( R , S )‐butyl malolactonate ( 7 ). The semicrystalline copolymer was characterized (M̄ n = 107 000, T g = 29,6°C, T m = 161°C, [α] = 1,5 deg · dm −1 · g −1 · cm 3 ) and its stereosequence investigated by 13 C NMR.