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Suppression of the Phase Separation in Binary n-Alkane Solid Solutions by Geometrical Confinement
Jiang, Kai1,3; Su, Yunlan1; Xie, Baoquan1,3; Meng, Yanfeng2; Wang, Dujin1
2009-03-19
Source PublicationJOURNAL OF PHYSICAL CHEMISTRY B
ISSN1520-6106
Volume113Issue:11Pages:3269-3272
AbstractThe crystallization of binary n-alkane solid solution n-C(18)H(38)/n-C(19)H(40) = 90/10 (molar ratio) (abbreviated as C(18)/C(19) = 90/10) and the microencapsulated counterpart (abbreviated as m-C(18)/C(19) = 90/10) has been investigated by a combination of differential scanning calorimetry (DSC) and temperature-dependent X-ray diffraction (XRD). The solid-solid phase separation was obviously detected in C(18)/C(19) = 90/10 by XRD, which is absent in m-C(18)/C(19) = 90/10. The XRD data also show that the chain packing of m-C(18)/C(19) = 90/10 is different from that of bulk C(18)/C(19) = 90/10. The packing mode of m-C(18)/C(19) = 90/10 molecular chains is unique; i.e., the n-alkane chains pack along the longitudinal direction and the neighboring layers interdigitate with each other, subsequently resulting in the deconstruction of lamellar ordering. The extinction of phase separation in m-C(18)/C(19) = 90/10 can be understood in terms of the suppression of longitudinal chain diffusion caused by the special three-dimensional confinement effect provided by microcapsules.
DOI10.1021/jp811496x
Indexed BySCI
Language英语
WOS IDWOS:000264111200003
PublisherAMER CHEMICAL SOC
Citation statistics
Cited Times:17[WOS]   [WOS Record]     [Related Records in WOS]
Document Type期刊论文
Identifierhttp://ir.iccas.ac.cn/handle/121111/68172
Collection中国科学院化学研究所
Corresponding AuthorSu, Yunlan
Affiliation1.Chinese Acad Sci, Beijing Natl Lab Mol Sci, Key Lab Engn Plast, Inst Chem, Beijing 100190, Peoples R China
2.Ludong Univ, Sch Chem & Mat Sci, Yantai 264025, Peoples R China
3.Chinese Acad Sci, Grad Sch, Beijing 100190, Peoples R China
Recommended Citation
GB/T 7714
Jiang, Kai,Su, Yunlan,Xie, Baoquan,et al. Suppression of the Phase Separation in Binary n-Alkane Solid Solutions by Geometrical Confinement[J]. JOURNAL OF PHYSICAL CHEMISTRY B,2009,113(11):3269-3272.
APA Jiang, Kai,Su, Yunlan,Xie, Baoquan,Meng, Yanfeng,&Wang, Dujin.(2009).Suppression of the Phase Separation in Binary n-Alkane Solid Solutions by Geometrical Confinement.JOURNAL OF PHYSICAL CHEMISTRY B,113(11),3269-3272.
MLA Jiang, Kai,et al."Suppression of the Phase Separation in Binary n-Alkane Solid Solutions by Geometrical Confinement".JOURNAL OF PHYSICAL CHEMISTRY B 113.11(2009):3269-3272.
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