TY  - JOUR
AU  - Perny, S.
AU  - Allgaier, J.
AU  - Cho, D.
AU  - Lee, W.
AU  - Chang, T.
TI  - Synthesis and structural analysis of an h-shaped polybutadiene
JO  - Macromolecules
VL  - 34
SN  - 0024-9297
CY  - Washington, DC
PB  - Soc.
M1  - PreJuSER-34289
SP  - 5408 - 5415
PY  - 2001
N1  - Record converted from VDB: 12.11.2012
AB  - The synthesis of an H-shaped polybutadiene homopolymer as well as its detailed structural characterization is investigated. Anionic polymerization techniques together with chlorosilane linking agents were used for the production of the material. After each reaction step samples were taken and analyzed by size exclusion chromatography (SEC), membrane osmometry (MO), NMR, and temperature gradient interaction chromatography (TGIC). According to the characterization by SEC, MO, and NMR, the H-polymer showed a high degree of structural uniformity after purification by fractionation, and no significant amounts of differently branched byproducts could be detected. The TGIC analysis however revealed the presence of large amounts of structures, mainly with lower branching degree. We also found that a significant isotope effect exists in the TGIC retention between deuterated and hydrogenous polymers. In our case, where the H-polymer is partially deuterated, the TGIC analysis enabled us to resolve all the side products. Comparison of the different analysis methods indicates that the precise structural analysis of branched model polymers such as the H-polymer requires more sophisticated methods than used in the past.
KW  - J (WoSType)
LB  - PUB:(DE-HGF)16
UR  - <Go to ISI:>//WOS:000170152200013
DO  - DOI:10.1021/ma001608v
UR  - https://juser.fz-juelich.de/record/34289
ER  -