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Synthesis of polypropene-graft-poly(ε-caprolactone)

✍ Scribed by Qi-jin Zhang; Jun Wen; Xiao-lie Luo; Zhi-yong Wang

Publisher
John Wiley and Sons
Year
1995
Tongue
English
Weight
298 KB
Volume
196
Category
Article
ISSN
1022-1352

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✦ Synopsis

The copolymerization of polypropene (PP) with maleic anhydride (MA) was carried out at 120 "C in xylene with benzoyl peroxide (BPO) as initiator. The resulting product was identified as poly@ropene-co-maleic anhydride) obtained by reaction of the double bond of maleic anhydride with free radicals created on the PP chain. In the next step this copolymer was reacted with functional poly(e-caprolactone) (PCL) by a co-melting method to give rise to a graft copolymer. The optimum time for the second step was found to be around 6 h (at 120 "C). X-ray diffraction measurements and DSC characterization of PP-g-PCL have shown that the melting point of the PP phase in the graft copolymers is lower than that of homopolypropene and that its glass transition temperature increases with increasing content of PCL grafts.

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