Anionic Polymerization of Cyclohexa‐1,3‐diene in Cyclohexane with High Stereoregularity and the Formation of Crystalline Poly(cyclohexa‐1,3‐diene)

Macromolecular Chemistry and Physics - Tập 204 Số 5-6 - Trang 755-761 - 2003
Roderic P. Quirk1, Fengxiang You2, Lei Zhu2, Stephen Z. D. Cheng2
1Maurice Morton Institute of Polymer Science, University of Akron, Akron, Ohio, 44325‐3909, USA. Fax: 330‐972‐5290
2Maurice Morton Institute of Polymer Science, University of Akron, Akron, Ohio 44325‐3909, USA

Tóm tắt

AbstractPolymerization of cyclohexa‐1,3‐diene using sec‐BuLi as initiator in cyclohexane produces both soluble (70–90 wt.‐%) and insoluble (10–30 wt.‐%) fractions depending on the temperature. The insoluble poly(cyclohexa‐1,3‐diene) was crystalline as determined by X‐ray diffraction and differential scanning calorimetry analysis (Tm = 178 °C). Both fractions were characterized by size exclusion chromatography and by 1H NMR and 13C NMR spectroscopy. The microstructures of both fractions were determined by high‐resolution 1H NMR and quantitative 13C NMR spectroscopy and compared to those poly(cyclohexa‐1,3‐diene)s prepared in benzene and in cyclohexane with 1,4‐diazobicyclo[2.2.2]octane (DABCO) as additive. The amount of 1,4‐addition of the insoluble fraction in cyclohexane was ≥ 97% and the cis planomer content was higher in cyclohexane than in benzene or in cyclohexane with DABCO as additive.DSC traces for the insoluble PCHD recrystallized from dichloroethane.magnified imageDSC traces for the insoluble PCHD recrystallized from dichloroethane.

Từ khóa


Tài liệu tham khảo

10.1002/pol.1964.100020723

10.1021/ma00232a041

10.1002/1521-3900(200007)157:1<143::AID-MASY143>3.0.CO;2-5

10.1021/cr00078a005

Schlüter A. D., 1998, Handbook of Conducting Polymers

10.1002/(SICI)1521-3773(19980302)37:4<402::AID-ANIE402>3.0.CO;2-9

10.1021/ma00128a052

10.1002/(SICI)1521-3927(19990201)20:2<50::AID-MARC50>3.0.CO;2-S

10.1002/marc.1988.030090607

10.1016/0379-6779(89)90272-5

10.1038/369387a0

10.1002/adma.19950071217

10.1016/0038-1098(95)00193-X

10.1021/cm980445a

10.1016/S0379-6779(98)01376-9

10.1021/ma961331s

10.1021/ma9712110

Kara S., 2000, Polym. Prepr. (Am. Chem. Soc., Div. Polym. Chem.), 41, 8

Williamson D. T., 2000, Polym. Prepr. (Am. Chem. Soc., Div. Polym. Chem.), 41, 1544

10.1021/ma0015626

10.1021/ma001679u

10.1021/ma001926u

Quirk R. P., 1982, Macromol. Symp., 183, 2017

10.1016/S0022-328X(00)83259-3

10.5254/1.3547458

Mango L. A., 1971, Polym. Prepr. (Am. Chem. Soc., Div. Polym. Chem.), 12, 402

10.1021/ma0017788

10.1016/0014-3057(73)90053-0

10.1002/1099-0518(20000815)38:16<3004::AID-POLA180>3.0.CO;2-J

10.1002/1521-3935(20010201)202:3<409::AID-MACP409>3.0.CO;2-7

10.1002/polb.1073

Claverie J. P., 1992, Polym. Prepr. (Am. Chem. Soc., Div. Polym. Chem.), 33, 1020

10.1002/(SICI)1099-0488(19980730)36:10<1657::AID-POLB7>3.0.CO;2-M

10.1021/ma0103167

10.1002/macp.1990.021911123

Thông tin
Thông tin xuất bản

Macromolecular Chemistry and Physics

Tập 204 Số 5-6

755-761

Thông tin tác giả