NDLI: Living lamellar crystal initiating polymerization and brittleness mechanism investigations based on crystallization during the ring-opening of cyclic butylene terephthalate oligomers

Content Provider	Royal Society of Chemistry (RSC)
Author	Zhang, Jianqiang Wang, Zongbao Zhou, Jian Gou, Quting Li, Ya Gu, Qun Chen, Peng Wang, Bingjie Zhang, Junwu
Copyright Year	2013
Abstract	The brittleness of polymerized cyclic butylene terephthalate (pCBT) is generally ascribed to its high crystallization degree and perfect crystal structure. Herein, a simple and effective method for improving the brittleness of pCBT is presented. Unlike other published toughening methods, this method did not decrease or destroy any of the natural advantages of cyclic butylene terephthalate oligomers (CBT) and its ring-opening polymerization (ROP). The melting behaviour and crystallization of CBT demonstrated that some CBT crystals were unable to melt completely during ROP. These un-melted crystals served as self-compatible nucleators and reduced the crystallization induction time of pCBT during ROP, they also plant many stress concentration points which result in the brittleness of pCBT, according to mechanical tests and crystallization kinetics. Finally, the “living lamellar crystal” initiating ROP and new brittleness mechanisms were proposed.
Starting Page	1648
Ending Page	1656
Page Count	9
File Format	HTM / HTML PDF
ISSN	17599954
Volume Number	4
Issue Number	5
Journal	Polymer Chemistry
DOI	10.1039/c2py20847d
Language	English
Publisher	Royal Society of Chemistry
Access Restriction	Open
Subject Keyword	Stress concentration CBT Ring-opening polymerization Butene
Content Type	Text
Resource Type	Article
Subject	Organic Chemistry Biochemistry Bioengineering Biomedical Engineering Polymers and Plastics

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