1-dars 1-§. Organik kimyo tarixi. Organik birikmalarning o‘ziga xos xususiyatlari darsning maqsadi

VIII Mustahkamlash: Mavzuga oid masalalarning yechimi.
1. Molekulyar massasi 56280 g/mol bo’lgan poliizobutilenning polimerlanish darajasini hisoblang.
Masalaning yechimi:Poliizobutilen izobuilenning polimerlanish reaksiyasidan olinadi. Shu
sababli reaksiya tenglamasini yozib olamiz.
n CH2 CCH3CH3( CH2 CCH3CH3) n
Reaksiyada qatnashayotgan monomerning polimerlanish darajasini topish uchun qatnashga monomerlar soni aniqlanadi. Izobutilenning molekulyar massasi 56 g/mol Polimerning molekulyar massasi esa 56280 g/mol η= 56 56280 =1005
Demak jarayonda 1005 molekula izobutilen qatnashgani aniqlandi.
Javob: 1005
2. Poliizobutilenning polimerlanish darajasi 550 ga teng bo’lsa, polimerning molekulyar massasini hisoblang.
Masalaning yechimi:
Masalani yechish uchun molekulyar massani hisoblash tenglamasidan foydalanamiz: M=m∙n m-monomerning molekulyar massasi ya’ni 56 g/mol. n-esa polimerlanish darajasi 550.
550 CH2 C(CH3)2 (-CH2-C(CH3)2-)550
Izobutilenning molekulyar massasi 56 ∙550=30800
Demak polimerning molekulyar massasi 30800 ga teng ekan. Javob: 30800
IX.Uyga vazifa: mustahkamlash Mavzuga oid masala va mashqlar.
1. Divinilning polimerlanish reaksiyasini yozing va polimer tarkibidagi monomerni ko‘rsating hamda polimerlanish darajasiga ta’rif bering.
2. Quyidagi moddalar polimerlanish reaksiya tenglamalarini yozing: a) etilen; b) propilen; c) izopren;
3. 2-xlorbutadiyen-1,3 dan xloropen kauchugining olinish reaksiyasini yozing.
4. Qaysi yuqori molekulyar massali birikma polikondensatsiya reaksiyasi natijasida olishini toping va reaksiya tenglamasini yozing: 1) Butadiyenkauchuk 2)Fenolformaldegidsmola 3)Polipropilen 4)Polivinilxlorid
5. Molekulyar massasi 13500 g/mol bo’lgan polibutadiyenning polimerlanish darajasini hisoblang.
6. Molekulyar massasi 62500 g/mol bo’lgan polivinilxloridning polimerlanish darajasini hisoblang.
7. Molekulyar massasi 18480 g/mol bo’lgan poliizobutilenning polimerlanish darajasini hisoblang.
8. Polibutadiyenning polimerlanish darajasi 1020 ga teng bo’lsa, polimerning molekulyar massasini hisoblang.
9. Polivinilxloridning polimerlanish darajasi 980 ga teng bo’lsa, polimerning molekulyar massasini hisoblang.
10. Poliizobutilenning polimerlanish darajasi 1085 ga teng bo’lsa, polimerning molekulyar massasini hisoblang.

62-DARS AMALIY MASHG’ULOT