Journal ArticleDOI
Thermal stabilities of end groups in hydroxyalkyl terminated polydimethylsiloxane oligomers
Iskender Yilgor,Emel Yilgor +1 more
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TLDR
In this paper, the authors studied the thermal stabilities of α,ω-hydroxyhexyl terminated polydimethylsiloxane (PDMS) oligomers and showed that the loss of functional end groups is due to the back biting of the terminal silicon in the PDMS by the primary hydroxyl oxygen.Abstract:
Thermal stabilities of α,ω-hydroxypropyl, α,ω-hydroxybutyl, α,ω-2-hydroxypentyl and α,ω-hydroxyhexyl terminated polydimethylsiloxane (PDMS) oligomers were studied. Hydroxypropyl and hydroxybutyl terminated polydimethylsiloxane oligomers showed degradation upon heating, through the loss of functional end groups as determined by FT-IR spectroscopy and gel permeation chromatography. α,ω-Hydroxyhexyl and α,ω-2-hydroxypentyl terminated polydimethylsiloxane oligomers were stable under similar conditions. Instability of the end groups is due to the back biting of the terminal silicon in the PDMS by the primary hydroxyl oxygen, leading to the formation of 5 and 6 membered, stable, heterocylic compounds. Loss of end groups also resulted in a dramatic increase in the molecular weights of the oligomers produced, as determined by gel permeation chromatography.read more
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Silicone containing copolymers: Synthesis, properties and applications
Emel Yilgor,Iskender Yilgor +1 more
TL;DR: A comprehensive survey of the recent developments on the synthesis, properties and applications of silicone containing copolymers is provided in this paper, where the effect of silicone oligomer and organic segment structure and molecular weight on the morphology and surface and bulk properties of the resultant silicone containing polymeric network structures is also discussed.
Journal ArticleDOI
Synthesis and characterization of novel room temperature vulcanized (RTV) silicone rubbers using Vinyl-POSS derivatives as cross linking agents
Dongzhi Chen,Dongzhi Chen,Shengping Yi,Shengping Yi,Weibing Wu,Yalan Zhong,Jun Liao,Chi Huang,Chi Huang,Wenjuan Shi +9 more
TL;DR: In this article, two kinds of novel POSS cross-linkers were firstly prepared via hydrosilylation of Vinyl-POSS and trimethoxysilane.
Journal ArticleDOI
Molecular Organization and Dynamics in Polymersome Membranes: A Lateral Diffusion Study
Fabian Itel,Mohamed Chami,Adrian Najer,Samuel Lörcher,Dalin Wu,Ionel Adrian Dinu,Wolfgang Meier +6 more
TL;DR: In this article, the lateral diffusion properties of diblock and triblock copolymers based on poly(2-methyl-2-oxazoline) and poly(dimethylsiloxane), with thicknesses between 6 and 21 nm, were systematically investigated.
Journal ArticleDOI
Effect of dispersion state of carbon nanotube on the thermal conductivity of poly(dimethyl siloxane) composites
TL;DR: In this paper, the effect of dispersion uniformity of multi-walled carbon nanotube (MWCNT) on the thermal conductivity of poly(dimethyl siloxane) (PDMS) composites was investigated by comparing experimentally obtained and calculated results based on simple models.
Journal ArticleDOI
Thermal behaviour and mechanical properties of novel RTV silicone rubbers using divinyl-hexa[(trimethoxysilyl)ethyl]-POSS as cross-linker
Dongzhi Chen,Jiaorong Nie,Shengping Yi,Shengping Yi,Weibing Wu,Yalan Zhong,Jun Liao,Chi Huang,Chi Huang +8 more
TL;DR: In this article, a series of novel polydimethylsiloxane (PDMS)/DVPS hybrid materials as room temperature vulcanized (RTV) silicone rubber were prepared.
References
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Book
Chemistry and technology of silicones
Abstract: Bargaining with reading habit is no need. Reading is not kind of something sold that you can take or not. It is a thing that will change your life to life better. It is the thing that will give you many things around the world and this universe, in the real world and here after. As what will be given by this chemistry and technology of silicones, how can you bargain with the thing that has many benefits for you?
MonographDOI
Rubber-toughened plastics
TL;DR: The authors provides reviews and reports by leading world-known scientists on the recent advances in toughening science and technology and addresses the development of theoretical and practical approaches of toughness improvements for both thermosets and thermoplastics.
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