In:
Journal of the Mexican Chemical Society, Sociedad Quimica de Mexico, A.C., Vol. 58, No. 2 ( 2017-10-12)
Abstract:
〈 p 〉 Different rubbers based on polybutadiene were synthesized in solution by the reversible addition-fragmentation chain-transfer polymerization (RAFT) technique using 4-cyano-4-[(dodecylsulfanylthiocarbonyl)sulfanyl] entanoic acid as RAFT agent and 1,1’-azobiscyclohexanecarbonitrile (Vazo-88) as initiator. The results obtained in the polymerization of polybutadiene and poly(butadiene- 〈 em 〉 co 〈 /em 〉 -acrylonitrile) (NBR) are discussed in terms of molecular weight distribution, composition and microstructure. Composition of polybutadiene in NBR´s was kept constant along the copolymerization, and the vinyl, 〈 em 〉 cis 〈 /em 〉 and 〈 em 〉 trans 〈 /em 〉 isomers are shown in values of around 12, 26 and 62% in all cases. Resulting rubbers were used to synthesize acrylonitrilebutadiene-styrene (ABS) type resins through an 〈 em 〉 in situ 〈 /em 〉 bulk polymerization. Dynamic-mechanical properties and the morphology were analyzed in all the different ABS resins. In DMA analyses, the rubber component presented two transitions as well as an increase in the magnitude of the transition located around -75 °C, which is explained by the significant amount of SAN occlusions in the morphology, analyzed by TEM. 〈 /p 〉
Type of Medium:
Online Resource
ISSN:
2594-0317
,
1870-249X
DOI:
10.29356/jmcs.v58i2.177
Language:
Unknown
Publisher:
Sociedad Quimica de Mexico, A.C.
Publication Date:
2017
detail.hit.zdb_id:
2210387-9
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