期刊
CHINESE JOURNAL OF POLYMER SCIENCE
卷 33, 期 6, 页码 815-822出版社
SPRINGER
DOI: 10.1007/s10118-015-1626-y
关键词
Trans-1,4-; Isoprene; Butadiene; Copolymer; Thermal properties
资金
- National Basic Research Program of China [2015CB654700, 2015CB654706]
- Shandong Province Natural Science Fund for Distinguished Young Scholars [JQ201213]
- National Natural Science Foundation of China [51473083]
Two series of trans-1,4-poly(butadiene-co-isoprene) copolymers (TBIR) were prepared using the catalyst system TiCl4/MgCl2-Al(i-Bu)(3) at different reaction temperatures. All dyad and triads sequence distributions, the number-average sequence length and the sequence concentration of the copolymers were calculated according to C-13-NMR spectra. The influences of temperature and initial molar ratio of butadiene to isoprene (Bd to Ip) on the distribution of the chain segments in the TBIR copolymers were discussed. The correlation of copolymer compositions and thermal properties were also evaluated, which facilitated the understanding of controlling the degree of crystallinity and the transition temperature by changing Bd content and temperature.
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