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4227698 
Journal Article 
Synthesis of novel functional polyolefin containing carboxylic acid via Friedel-Crafts acylation reaction 
Zheng, Yi; Li, Y; Pan, Li; Li, Y 
2007 
1 
Polymer
ISSN: 0032-3861 
ELSEVIER SCI LTD 
OXFORD 
48 
9 
2496-2502 
English 
WOS:000246329300007 
The strong polar group, carboxylic acid, has triumphantly been introduced into ethylene and allylbenzene copolymers without obvious degradation or crosslinking via Friedel-Crafts (F-C) acylation reaction with glutaric anhydride (GA), succinic anhydride (SA) and phthalic anhydride (PA) in the presence of anhydrous aluminum chloride in carbon disulfide. Some important reaction parameters were examined in order to optimize the acylation process. In the optimum reaction conditions, almost all of the phenyls can be acylated with any anhydride. The microstructure of acylated copolymer was characterized by Fr-IR, H-1 NMR and H-1-H-1 COSY. All the peaks of acylated copolymers can be accurately attributed, which indicates that all the acylation reactions occur only at the para-positions of the substituent of the aromatic rings. The thermal behavior was studied by differential scanning calorimetry (DSC), showing that the melting temperatures (T(m)s) of acylated copolymers with GA firstly decrease slowly and then increase significantly with the increase of the amount of carboxyl acid groups. (c) 2007 Elsevier Ltd. All rights reserved. 
functionalization of polymers; polyolefins; Friedel-Crafts acylation reaction