NDLI: Catalysis of Thermal Cure and Ceramization of Phenylethynyl-Terminated Oligosilane

Content Provider	Springer Nature Link
Author	Huang, Chuanjin Wang, Mingcun Wang, Zhehui
Copyright Year	2015
Abstract	Phenylethynyloligosilane (PEPSI), prepared by lithium condensation, was stable in liquid state after a bench life over one year, and PEPSI can be used as precursor of SiC–C ceramic. The thermal cure occurred readily through polymerization reaction of ethynyl groups and hydrosilylation of Si–H with ethynyl at 230–330 °C. Thermal cure was dramatically accelerated by catalyst addition; among the investigated catalysts of Fe(acac)$_{3}$, Co(acac)$_{3}$ and Ni(acac)$_{2}$, the highest catalysis performance was achieved for Ni(acac)$_{2}$. The effect of catalyst amount [1, 2 and 3 % Ni(acac)$_{2}$, respectively] on thermal cure and ceramization was studied using DSC, TGA, XRD, and SEM–EDS, etc. The results show: 1 % weight of catalyst Ni(acac)$_{2}$ was enough for catalytic thermal cure and pyrolysis; the thermal cure process showed a decrease in the initiation crosslinking temperature from 230 to 120 °C and the peak temperature from 280 to 155 °C; the ceramic yield was improved from 58 to 71 %; the ceramic crystallization was accelerated by catalytic sintering of Ni(acac)$_{2}$.
Starting Page	242
Ending Page	253
Page Count	12
File Format	PDF
ISSN	15741443
Journal	Journal of Inorganic and Organometallic Polymers and Materials
Volume Number	26
Issue Number	1
e-ISSN	15741451
Language	English
Publisher	Springer US
Publisher Date	2015-12-08
Publisher Place	New York
Access Restriction	One Nation One Subscription (ONOS)
Subject Keyword	Phenylethynyloligosilane Nickel acetylacetonate Catalytic thermal cure Catalytic pyrolysis Inorganic Chemistry Organic Chemistry Polymer Sciences
Content Type	Text
Resource Type	Article
Subject	Materials Chemistry Polymers and Plastics

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