Some Important Compounds Of Carbon And Silicon
Chapter Name : The P- Block Elements |
Sub Topic Code : 102_11_11_09_04 |
Topic Name : Some Important Compounds Of Carbon And Silicon |
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Sub Topic Name : Silicones |
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Introduction
1. Silicone's are a group of organo-silicon polymers, which have (R2SiO) as a repeating unit. 2.Hydrolysis of dimethyldichlorosilane, (CH3)2SiCl2 followed by condensation polymerization yields straight chain polymers. 3. Silicone's being surrounded by non-polar alkyl groups are water repelling in nature. 4.They have in general high thermal stability, high dielectric strength and resistance to oxidation and chemicals. 5.They are used as sealant, greases, electrical insulators and for water proofing of fabrics. 6.Being bio-compatible they are also used in surgical and cosmetic implants.
Pre-Requisites:
Elements, periodic table
Activity:
Silicone's are used as sealant, greases, electrical insulators and for water proofing of fabrics.
Real Life Question:
What is silica gel used for?
Key Words / FlashCards
| Key Words | Definitions (pref. in our own words) |
|---|---|
| P block elements | Have the last electron in the outermost p orbital |
Learning aids / Gadgets
| Gadgets | How it can be used |
|---|---|
| Silicone implants | Being bio-compatible they are also used in surgical and cosmetic implants. |
Real life uses :
1.They are used as sealant, greases, electrical insulators and for water proofing of fabrics. 2.Being bio-compatible they are also used in surgical and cosmetic implants.
Places to visit :
Kitchen, doctors office
Practical examples around us
| Examples | Explainations |
|---|---|
| sealant, greases, electrical insulators | Made of silicon |
What you learn in Theory:
1. Silicone's are a group of organo-silicon polymers, which have (R2SiO) as a repeating unit. 2.Hydrolysis of dimethyldichlorosilane, (CH3)2SiCl2 followed by condensation polymerization yields straight chain polymers. 3. Silicone's being surrounded by non-polar alkyl groups are water repelling in nature. 4.They have in general high thermal stability, high dielectric strength and resistance to oxidation and chemicals. 5.They are used as sealant, greases, electrical insulators and for water proofing of fabrics. 6.Being bio-compatible they are also used in surgical and cosmetic implants.
What you learn in Practice:
Quartz is an efficient piezoelectric material