Daffodil International University

Faculty of Engineering => Textile Engineering => Topic started by: Md. Al-Amin on May 22, 2018, 01:26:26 PM

Title: Why So Called Reactive Dye.
Post by: Md. Al-Amin on May 22, 2018, 01:26:26 PM

Reactive dyes are so called because this is the only type of dye, which has reactive group, and that reactive group reacts chemically with fibre polymer molecules and form covalent bond. This covalent bond is formed between the reactive group and terminal –OH (Hydroxyl) group of polyamide and wool fibre or between reactive group and terminal -NH2 (Amino) group of cellulosic fibre polymer. The strength of this covalent bond is more than ionic bond, hydrogen bond and Vander Waal’s force of attraction. Thus the reactive group becomes an integral part of the fibre.
For this reasons the dyes are so called. They are also called ‘fibre reactive group’.

Title: Re: Why So Called Reactive Dye.
Post by: fahmidasiddiqa on May 23, 2018, 12:15:11 PM

good

Title: Re: Why So Called Reactive Dye.
Post by: nadimhaider on May 28, 2018, 11:26:17 AM

All TE people should know this.

Title: Re: Why So Called Reactive Dye.
Post by: Nusrat Jahan Bristy on May 31, 2018, 03:16:05 PM

Thanks for showing interest in chemistry of Reactive dye...

Title: Re: Why So Called Reactive Dye.
Post by: Raisa on June 05, 2018, 09:49:08 AM

good

Title: Re: Why So Called Reactive Dye.
Post by: parvez.te on June 05, 2018, 11:58:35 AM

good...

Title: Re: Why So Called Reactive Dye.
Post by: Sharminte on August 01, 2018, 11:17:25 AM

nice

Title: Re: Why So Called Reactive Dye.
Post by: Md. Al-Amin on October 20, 2018, 11:30:26 AM

Thanks.

Title: Re: Why So Called Reactive Dye.
Post by: Kazi Rezwan Hossain on October 21, 2018, 01:18:12 PM

Thanks for sharing

Title: Re: Why So Called Reactive Dye.
Post by: Md. Al-Amin on October 22, 2018, 10:24:24 AM

Thanks for appreciation.