UBUCIKO
UBUHLE NEMPILO
UBUCIKO BEZANDLA
AMASIKO NOMLANDO
EZOKUZIJABULISA
IMVELO
UKUDLA NEZIPHUZO
REVERSE ENGINEERING
IZAYENSI
EZEMIDLALO
UBUCHWEPHESHE
IZINTO EZIGQOKWAYO
Nylon 66 Pellets: Nylon Salt Polymerised in an Autoclave, Carothers 1938
Mary

Yenziwe ngu-

Mary

17. uMfumfu 2026FI
8
0
0
0
0

Nylon 66 Pellets: Nylon Salt Polymerised in an Autoclave, Carothers 1938

Nylon salt heated to 288 °C under oxygen-free nitrogen gives off water and joins into long chains of nylon 66 (Carothers, du Pont, US 2,130,948, 1938: two moles of salt in a silver-lined autoclave). A pinch of extra adipic acid keeps the melt's viscosity steady. The polymer is then extruded and cut into pellets. The picture: our drawing of the autoclave and the pellet line.
Osezingeni eliphezulu
A day

Imiyalelo

1

Charge the autoclave

Put two moles of nylon salt (525 g) and 0.02 mole of adipic acid (2.9 g) in a two-litre silver-lined autoclave with a stainless stirrer and a reflux condenser leading to a receiver.

Izinto zokwakha zalesi sinyathelo:

Usawoti we-nylonUsawoti we-nylon525 g
I-adipic acidI-adipic acid2.9 g

Amathuluzi adingekayo:

I-reactor yengcindeziI-reactor yengcindezi
Ugoqo lwe-condenserUgoqo lwe-condenser
Isikali Sedijithali SasekhishiniIsikali Sedijithali Sasekhishini
2

Drive out the air

Evacuate, fill with nitrogen, evacuate again, then apply 80 lb/in² of nitrogen. Use nitrogen free of oxygen; oxygen spoils the polymer.

Amathuluzi adingekayo:

Iphampu yomoyaIphampu yomoya
I-nitrogenI-nitrogen
Isilinganiso SengcindeziIsilinganiso Sengcindezi
3

Heat to 288 °C

Start the stirrer and heat to 288 °C over 1.5 hours.

Amathuluzi adingekayo:

I-reactor yengcindeziI-reactor yengcindezi
I-thermocouple enesibonisiI-thermocouple enesibonisi
4

Let the water off

Bring the pressure down to atmospheric over half an hour and keep heating and stirring 2.5 hours. Then pull to 200 mm absolute for a few minutes.

Amathuluzi adingekayo:

I-reactor yengcindeziI-reactor yengcindezi
Iphampu yomoyaIphampu yomoya
Isilinganiso SengcindeziIsilinganiso Sengcindezi
I-thermocouple enesibonisiI-thermocouple enesibonisi
5

Cool and take out

Cool. The polymer comes out as a white solid cake that melts at about 263 °C.

Amathuluzi adingekayo:

I-reactor yengcindeziI-reactor yengcindezi
6

Pelletise

Break up the cake (our step), melt it in the extruder, draw the strand and cut it into pellets.

Amathuluzi adingekayo:

I-extruder yepulasitikiI-extruder yepulasitiki
Isikhunta se-extrusionIsikhunta se-extrusion
7

Grams and pressures

Ilayisha incwadi ye-Jupyter…

Izinto

2

Amathuluzi Adingekayo

9

Le blueprint yenza

Thumbnail
Isibambeli

Ama-pellet e-nylon

Free

82
0
1

Ama-blueprint ahlobene

Lama-blueprint abelana ngolwazi — amasu, izinto noma izimiso

Nylon Salt: Hexamethylenediamine and Adipic Acid Crystallized from Alcohol, Carothers 1938

Nylon Salt: Hexamethylenediamine and Adipic Acid Crystallized from Alcohol, Carothers 1938

ngu-TexFO

Polymer

3
0
0
0
0
0
Polypropylene Pellets by Bulk Polymerisation in Liquid Propylene

Polypropylene Pellets by Bulk Polymerisation in Liquid Propylene

ngu-CharlieDE

Polymer

4
0
0
0
0
0

CC0 Isizinda Somphakathi

Le blueprint ikhishwe ngaphansi kwe-CC0. Ukhululekile ukukopisha, ukuguqula, ukusabalalisa, nokusebenzisa ngaphandle kwemvume.

Sekela uMenzi ngokuthenga imikhiqizo nge-Blueprint yabo IKhomishane Yomenzi kumiswe ngabathengisi, noma dala inguqulo entsha yale Blueprint bese uyifaka njengoxhumaniso ku-Blueprint yakho ukuze wabelane ngemali engenayo.

Ingxoxo

(0)

Ngena ukuze ujoyine ingxoxo

Kulayishwa amazwana...