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Citation: HUANG Yi-Ping, CHEN Guang-Mei, WANG Song, LI Hong-Wu, MA De-Zhu. The Chain Structure of Two Typical Styrene-butadiene Rubbers Studied by NMR[J]. Chinese Journal of Applied Chemistry, ;2005, 22(4): 431-434. shu

The Chain Structure of Two Typical Styrene-butadiene Rubbers Studied by NMR

1.
a School of Chemistry and Chemical Engineering, Anhui University, Hefei 230039;
2.
b Department of Polymer Science, University of Science and Technology of China, Hefei

Corresponding author: HUANG Yi-Ping,
Received Date: 30 June 2004
Available Online: 26 November 2004

The composition and chain structures of two solution polymerized styrene-butadiene rubbers (S-SBR) were studied by means of ¹H NMR and ¹³C NMR.The copolymer composition of the S-SBR from Yanshan (SSBR1) was similar to that of the S-SBR from Bayer (SSBR2).The contents of styrene units in the two S-SBRs are all about 14% (mole fraction).SSBR1 has a higher content of trans-1,4 polybutadiene (PB) structure (about 49.7% (mole fraction)).The cis-1,4 polybutadiene content in SSBR2 is very high (49.4% (mole fraction)) and segmented cis-1,4 PB was found in SSBR2.The content of 1,2-add PB in SSBR2 is lower than that in SSBR1.The chain structure of SSBR2 induces good compatibility between SSBR2 and (natural) rubbers,and SSBR2 has a lower glass transition temperature than SSBR1.
- solution polymerized styrene-butadiene rubber,
- chain structure,
- compatibility
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