Yuqorimolekulyar birikmalar

67 fan bobi-1; fan bo’limi-3; qiyinlilik darajasi-3;

Quyidagilardan qaysi biri ideal sopolimerlanish holatini ifodalaydi?

№ 68 fan bobi-1; fan bo’limi-2; qiyinlilik darajasi-1;

Quyidagilardan sun`iy polimerlar qatorini ko`rsating

Nitrotsellyuloza, atsetiltsellyuloza, karboksimetiltsel­lyuloza

Polistirol, tsellyuloza, pektin

TSellyuloza, organik shisha, pektin

Karbosimetiltsellyuloza, nitrotsellyuloza, tsellyuloza

№ 69 fan bobi-1; fan bo’limi-3; qiyinlilik darajasi-2;

Quyidagilarning qaysi biri blok sopolimerning tarkibini ifodalaydi?

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№ 70 fan bobi-1; fan bo’limi-3; qiyinlilik darajasi-2;

Quyidagilarning qaysi biri statistik sopolimerlarning tarkibini ifodalaydi?

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№ 71 fan bobi-1; fan bo’limi-3; qiyinlilik darajasi-3;

M1 va M2 monomerlarning radikal sopolimerlanish doimiyliklari quyidagicha: agar boshlang’ich monomerlar aralashmalarining nisbati 1:1 bo`lsa, qanday tarkibli sopolimer hosil bo`ladi

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№ 72 fan bobi-1; fan bo’limi-3; qiyinlilik darajasi-3;

Metilmetakrilat monomerini qaysi initsiator ishtirokida initsirlab, polimetilmetakrilat olish mumkin? 1) Benzoil peroksid 2) N-butillitiy ishtirokida 3) 100^o S da xavo kislorodi ishtirokida

1,2,3

1

2

3

№ 73 fan bobi-1; fan bo’limi-3; qiyinlilik darajasi-3;

Metilmetakrilatni massadagi radikal polimerlanishining konversiya 15 % dan ortganda, umumiy tezligining ortishi qanday tushuntiriladi?

Zanjirni uzilish Reaktsiyasi tezligining kamayishi

Initsilanish Reaktsiyasi tezligining ortishi

Zanjirli o’sish Tezligining ortishi

Initsirlanish Reaktsiyasi tezligining kamayishi

№ 74 fan bobi-1; fan bo’limi-3; qiyinlilik darajasi-3;

Metilmetakrilatning polimerlanish reaktsiyasini azobisizobutironitril initsiatori ishtirokida 70^oС da massada olib borilganda initsiator kontsentratsiyasi 4 marta oshirilsa, polimerlanish darajasi (pn) necha marotaba o`zgaradi? Zanjirni uzatish reaktsiyasini hisobga olmaganda

2 marta kamayadi

4 marta kamayadi

2 marta ortadi

O`zgarmaydi