Journal
PETROLEUM SCIENCE AND TECHNOLOGY
Volume 35, Issue 17, Pages 1775-1783Publisher
TAYLOR & FRANCIS INC
DOI: 10.1080/10916466.2017.1375947
Keywords
comb-like polymer; pour point depressant; polyhedral oligomeric silsesquioxane; nanocomposite; rheological beneficiation; RAFT polymerization; waxy crude oil
Funding
- National Natural Science Foundation of China [51774311]
- Natural Science Foundation of Shandong Province of China [ZR2017MEE022]
- Shandong Province Key Research and Development Plan [GG20170323012]
- Fundamental Research Funds for the Central Universities-China [17CX06019]
- China University of Petroleum [YCXJ2016070]
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The comb-like copolymer-polyhedral oligomeric silsesquioxane (POSS) nanocomposite PPDs, including POA-POSS, POA-VA-POSS, POA-MA-POSS and POA-St-POSS, were first synthesized via in-situ reversible addition-fragmentation chain transfer (RAFT) polymerization and characterized by FT-IR, NMR and TGA methods. Subsequently, the effects of the nanocomposite PPDs on rheology of a waxy crude oil were studied. Results showed that POA-VA-POSS is the most efficient PPD among the nanocomposite PPDs, which can depress the pour point, gelation point, apparent viscosity and yield stress of the crude oil to the lowest. Associated with the microstructure of crude oil, the rheological improving mechanisms of the copolymer-POSS nanocomposite PPDs are discussed.
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