Side‐chain crystallization and phase transition of poly[styrene‐co‐(maleic anhydride)]‐g‐alkylamine comb‐like polymers

Taking NHCO as the chemical spacer, poly[styrene‐co‐(maleic anhydride)]‐g‐alkylamine (SMACnN) comb‐like polymers are prepared through grafting reaction between poly[styrene‐co‐(maleic anhydride)] and n‐alkylamine with n changing from 12 to 18. SMACnN comb‐like polymers present an obvious crystalli...

Full description

Saved in:
Bibliographic Details
Published in:Polymer international 2022-01, Vol.71 (1), p.57-65
Main Authors: Mao, Huiqin, Wang, Yanpeng, Wang, Haixia, Li, Lang, Shi, Haifeng
Format: Article
Language:English
Subjects:
Alkylamines
comb‐like polymer
conformation
Crystal structure
Crystallites
Crystallization
Crystals
Enthalpy
Fourier analysis
Fourier transforms
Infrared analysis
Maleic anhydride
Melt temperature
phase transition
Phase transitions
Polymers
side‐chain length
Styrene
Styrenes
Citations: Items that this one cites
Items that cite this one
Online Access:Get full text
Tags: Add Tag
No Tags, Be the first to tag this record!
Description
Summary:Taking NHCO as the chemical spacer, poly[styrene‐co‐(maleic anhydride)]‐g‐alkylamine (SMACnN) comb‐like polymers are prepared through grafting reaction between poly[styrene‐co‐(maleic anhydride)] and n‐alkylamine with n changing from 12 to 18. SMACnN comb‐like polymers present an obvious crystallization behavior owing to the introduced alkyl side chains, and the melting temperature and enthalpy of the side‐chain crystallites increase from 9.2 to 41.6 °C and from 6.0 to 17.6 kJ mol−1, respectively, showing a variation with the side‐chain length. At least 12 side‐chain carbon atoms are required to pack into a hexagonal crystal structure for SMACnN comb‐like polymers. Fourier transform infrared and X‐ray analysis results demonstrate the phase transition from hexagonal to an amorphous state, and the conformationally disordered alkyl chains affect the packing manner of side‐chain crystallites. Including the side‐chain length and polymer backbone, the chemical spacer between the side chain and the main chain influences the formation of side‐chain crystallites and the phase transition process. So, the study of SMACnN further strengthens the understanding of the phase transition behavior and side‐chain crystallization of comb‐like polymers triggered by the side‐chain length and the microstructure differences. © 2021 Society of Industrial Chemistry. Side‐chain packing manner and crystallization habits depend on the polymer backbone, side‐chain length and chemical spacer.
ISSN:0959-8103
1097-0126
DOI:10.1002/pi.6283