Vulcanisation of Rubber | Polymer Form 5 Chemistry KSSM Chapter 4 Polymer This video is created by course.onlinetu... More videos and free notes are available at chemistry.blog....
Did you put the effect of solvents wrong on the characteristic of natural rubber? Because natural rubber suppose to reacts easily with acids, alkalis and organic solvents right? As said in the textbook.
@@darrendong1228 it is in liquid form at start. They put forgive acid in to make it coagulate and harden. From there, they do with what they will with different polymers. I work for a place that manufacturers rubber compounds. I deal with a lot of synthetic and natural materials. The stuff we use isn't prevulcanized. We add sulfur and accelerators for that.
@@brandanporter2063 thanks for your insight. My original question was 'why PVNR is in liquid state. I understand after vulcanization (adding sulfur and accelerators) it becomes solid since it cross links. Also I am aware that in acidic environment, the natural rubber particle's protein membrane was broken so the NR precipitates (coagulate, in your word)
Thank you. Very nice video. BTW i heard the Malaysian accent, :)
Hahaaa i oso feel that he's a malaysian
Fantastic, easy to understand and straight to the point, thankyou.
you deserve a like sir
Rubber is a good population controller
not as good as ideologic propaganda, tho
Did you put the effect of solvents wrong on the characteristic of natural rubber? Because natural rubber suppose to reacts easily with acids, alkalis and organic solvents right? As said in the textbook.
Thankyou. veri knowlegde full video
Thanks a lot sir..I'm so thankful
Great explanation and video . Which kind of rubber is used for the mattresses? natural or vulcanized?
Thank u so much
Brilliant I wanted an easy to understand explanation
Butyl reclaimed Rubber is very good.
Love the asain accent❤
Thankyou sir.
You are most welcome :)
Thank you so much sir
Most welcome
This explains why noahs ark did not melt in the caustic superheated waters of the flood.
Thank you!
You're welcome!
I have a question, if the vulcanized rubber is cross-linked, then why the prevulcanized latex natural rubber (PVNR) is still liquid?
Because they haven't put anything in it to help it coagulate. Also, putting additives in it such as carbon black help with hardening.
@@brandanporter2063 from my knowledge, cross-linked polymer cannot be in liquid state. The 'coagulate' is not scientific enough to describe it.
@@darrendong1228 it is in liquid form at start. They put forgive acid in to make it coagulate and harden. From there, they do with what they will with different polymers. I work for a place that manufacturers rubber compounds. I deal with a lot of synthetic and natural materials. The stuff we use isn't prevulcanized. We add sulfur and accelerators for that.
@@brandanporter2063 thanks for your insight. My original question was 'why PVNR is in liquid state. I understand after vulcanization (adding sulfur and accelerators) it becomes solid since it cross links. Also I am aware that in acidic environment, the natural rubber particle's protein membrane was broken so the NR precipitates (coagulate, in your word)
I don't see how cross-linking increases elasticity. If only it should reduce it...
I agree
Excellent explanation
Glad you liked it
@@myhometuition hi sir
@@myhometuition may I have your email please
Thank you so much
You're most welcome
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