TEM studies on single crystal structure of syndiotactic poly(propene-co-butene-1)s
Zhang, B; Yang, DC; De Rosa, C; Yan, S
Source PublicationMACROMOLECULES
AbstractThemorphologies and structures of single crystals of syndiotactic poly(propene-co-1-butene) (PPBU) with 1-butene contents of 2.6, 4.2, 9.9, 16.2, and 47.9 mol % are studied by transmission electron microscopy and electron diffraction. The electron diffraction results show that the 1-butene units are included in the crystalline phase of the sPP homopolymer. A small amount of 1-butene (<4.2 mol %) has no significant influence on the antichiral chain packing of sPP. With increasing content of 1-butene units, an increasing packing disorder is observed in the PPBU copolymers. The antichiral packing model is, however, always the predominant chain packing structure of the copolymers with the analyzed composition. Bright-field electron microscopy observation shows that the PPBU single crystals exhibit always regular rectangular or lathlike shapes with preferred growth direction along their crystallographic b-axes owing to their packing features. The incorporated 1-butene units influence the crystallization behavior of sPP distinctly. With the increase of the 1-butene units, the aspect ratio of the single crystals increases. Furthermore, the typical transverse microcracks and ripples of the highly stereoregular sPP are no more so prominent for the copolymers. The microcracks are occasionally observed in the single crystals of copolymers with low 1-butene content (less than or equal to4.2 mol %), while transverse ripples are only seen in the crystals of the copolymer having a 1-butene content of 9.9 mol %. With a further increase in the content of 1-butene units, the copolymers behave like the low stereoregular sPP, where neither cracks nor ripples are observed any more.
Indexed BySCI
WOS IDWOS:000175937400016
Citation statistics
Cited Times:15[WOS]   [WOS Record]     [Related Records in WOS]
Document Type期刊论文
Corresponding AuthorYan, S
Affiliation1.Chinese Acad Sci, Inst Chem, State Key Lab Polymer Phys & Chem, Ctr Macromol Sci, Beijing 100080, Peoples R China
2.Chinese Acad Sci, Inst Appl Chem, State Key Lab Polymer Phys & Chem, Changchun 130022, Peoples R China
3.Univ Naples Federico II, Dipartimento Chim, I-80126 Naples, Italy
Recommended Citation
GB/T 7714
Zhang, B,Yang, DC,De Rosa, C,et al. TEM studies on single crystal structure of syndiotactic poly(propene-co-butene-1)s[J]. MACROMOLECULES,2002,35(12):4646-4652.
APA Zhang, B,Yang, DC,De Rosa, C,&Yan, S.(2002).TEM studies on single crystal structure of syndiotactic poly(propene-co-butene-1)s.MACROMOLECULES,35(12),4646-4652.
MLA Zhang, B,et al."TEM studies on single crystal structure of syndiotactic poly(propene-co-butene-1)s".MACROMOLECULES 35.12(2002):4646-4652.
Files in This Item:
There are no files associated with this item.
Related Services
Recommend this item
Usage statistics
Export to Endnote
Google Scholar
Similar articles in Google Scholar
[Zhang, B]'s Articles
[Yang, DC]'s Articles
[De Rosa, C]'s Articles
Baidu academic
Similar articles in Baidu academic
[Zhang, B]'s Articles
[Yang, DC]'s Articles
[De Rosa, C]'s Articles
Bing Scholar
Similar articles in Bing Scholar
[Zhang, B]'s Articles
[Yang, DC]'s Articles
[De Rosa, C]'s Articles
Terms of Use
No data!
Social Bookmark/Share
All comments (0)
No comment.

Items in the repository are protected by copyright, with all rights reserved, unless otherwise indicated.