Synthesis and Characterization of A New Catechol Derived Coupling Agent

Bibliographic Details
Main Author:	Liang, Honghe
Language:	English
Published:	University of Akron / OhioLINK 2019
Subjects:	Polymers Polymer Chemistry
Online Access:	http://rave.ohiolink.edu/etdc/view?acc_num=akron1555671275779722

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spelling	ndltd-OhioLink-oai-etd.ohiolink.edu-akron15556712757797222021-08-03T07:10:40Z Synthesis and Characterization of A New Catechol Derived Coupling Agent Liang, Honghe Polymers Polymer Chemistry This study investigates catechol derivatives as coupling agents for rubber reinforcement using silica. Methods to synthesize various catechol derivatives that have different chain length and functional end group will be presented. The structures of the catechol-based coupling agents are shown below. The catechol group in these coupling agents is expected to chelate to the silicon atoms on the surface of silica, and the sulfide groups react with the unsaturation in the rubber. Blends of styrene-butadiene rubber (SBR) and butadiene rubber (BR) reinforced by silica are studied. The Payne effect of uncured rubber was studied as an indicator to the silica dispersion in the SBR/BR phase promoted by the catechol-base coupling agents. Payne effect of cured rubber compounds was studied as an indicator to the ability of the catechol-based coupling agents to prevent silica from re-aggregate during vulcanization. The catechol-based coupling agents are less effective than silane coupling agent bis[3-(triethoxysilyl)propyl] tetrasulfide (TESPT). The dynamic mechanical properties of the catechol derivatives modified cured sample are intermediate between the TESPT-containing standard and the unmodified standard. It appears that the inferior performances due to the reduced basicity of the catechol derivates having an electron-withdrawing acyl group. Synthesis of catechol-based coupling agents that overcome this problem is underway. 2019-11-20 English text University of Akron / OhioLINK http://rave.ohiolink.edu/etdc/view?acc_num=akron1555671275779722 http://rave.ohiolink.edu/etdc/view?acc_num=akron1555671275779722 restricted--full text unavailable until 2024-05-11 This thesis or dissertation is protected by copyright: all rights reserved. It may not be copied or redistributed beyond the terms of applicable copyright laws.
collection	NDLTD
language	English
sources	NDLTD
topic	Polymers Polymer Chemistry
spellingShingle	Polymers Polymer Chemistry Liang, Honghe Synthesis and Characterization of A New Catechol Derived Coupling Agent
author	Liang, Honghe
author_facet	Liang, Honghe
author_sort	Liang, Honghe
title	Synthesis and Characterization of A New Catechol Derived Coupling Agent
title_short	Synthesis and Characterization of A New Catechol Derived Coupling Agent
title_full	Synthesis and Characterization of A New Catechol Derived Coupling Agent
title_fullStr	Synthesis and Characterization of A New Catechol Derived Coupling Agent
title_full_unstemmed	Synthesis and Characterization of A New Catechol Derived Coupling Agent
title_sort	synthesis and characterization of a new catechol derived coupling agent
publisher	University of Akron / OhioLINK
publishDate	2019
url	http://rave.ohiolink.edu/etdc/view?acc_num=akron1555671275779722
work_keys_str_mv	AT lianghonghe synthesisandcharacterizationofanewcatecholderivedcouplingagent
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Synthesis and Characterization of A New Catechol Derived Coupling Agent

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