Namangan muhandislik-texnologiya instituti kimyoviy-texnologiya kafedrasi yuqori molekulyar birikmalar

2-TAJRIBA MASHG`ULOTI
MAVZU: Ammoniy persulfatda initsirlagan akrilonitrilning polimerlanishi.


Reaktiv va asboblar: haydalgan akrilonitril (10 g), ammoniy persulfat (0.3 g), natriy tiosulfat (0.2 g), 500 ml sig`imli uch og`izli, qaytarma sovutgich va tomchilatma voronka bilan jihozlangan reaksion kolba (1 dona), suv hammomi, Bunzen kolbasi bor Byuxner voronkasi.
Kolbada 40 ml suv, 0.3 g ammoniy persulfate va 0.2 g natriy tiosulfatdan iborat eritma tayyorlanadi. eritmaga 10 g akrilonitril qo`shiladi va mexanik qorgich bilan qorishtirib turilgani holda 60 <sup>0</sup>C li suv hammomida 4 soat qizdiriladi. Hosil bo`lgan polimer kukuni cho`ktiriladi. Byuxner voronkasida filtrlanib, sulfid ioniga nisbatan salbiy reaksiya berguncha iliq suv bilan chayiladi.

Qaytarma sovutgich va qorgich bilan jihozlangan reaksion probirka.

Poliakrilonitril 60 ⁰C li quritish shkafida og`irligi o`zgarmay qolguncha saqlanadi.

1-topshiriq. Polimerning miqdori aniqlansin.
2-topshiriq. Polimer tarkibidagi nitril guruhlari miqdori gidrolizlash yo`li bilan topilsin.
3-topshiriq. Ammoniy persulfate bilan natriy tiosulfat orasida bo`ladigan reaksiyalarning va polimerlanish reaksiyasining tenglamalari yozilsin.


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