Article · February 020 citations reads 65 authors: Some of the authors of this publication are also working on these related projects


POLYMERIZATION OF EPICHLORHYDRINE WITH THE



Download 1,33 Mb.
Pdf ko'rish
bet28/71
Sana21.02.2022
Hajmi1,33 Mb.
#44970
1   ...   24   25   26   27   28   29   30   31   ...   71
Bog'liq
Tezislar

 
POLYMERIZATION OF EPICHLORHYDRINE WITH THE 
PHOSPHORUS COMPOUND. 
Mukhamedgaliev B., Habibullaev S., Mirzoitov M., Allamuradov M. 
Tashkent State Tehnical University, Tashkent Republic of Uzbekistan. 
 
Nowadays an Epichlorohydrine (ECG) is widely used for the polymers 
synthesis, and its high reaction ability made it possible to synthesis some epoxy 
polymers. 
In this aspect the reaction of interaction ECG with trivalent phosphorus units, 
which is the same due to structure of trivalent nitrogen, is much more interesting 
for study. We have studied the reaction of intereaction ECG with triphenilphosphin 
(TPP) which is less toxic. The kinetic regularity of TPP and ECG intereaction by 
dilatometrical method was received. It is proved, that effective inhibitors of the 
radical polymerization such as hydroquinone, air oxygen, stable emine oxide 
radicals, 2.2.6.6. - tetramethylpiperidine - 1 - oxide don’t influence the
polymerization speed and that proves the non - radical character of the process. In 
EMR - spectrum of TPP and ECG system with different conditions the formation 
of radical is not seen. On the solvent influence the starting velocity of TPP and 
ECG interaction has been studied. 
The investigations were made with the homogeneity of the medium. The 
results showed that the more the solvent dielectric penetrability the more the 
reaction speed and that is connected with the increasing of Menshutkin reaction 
which is the first stage of the process. 


24 
On the basis of the solvent influence on the process velocity the further kinetic 
regularity was investigated within the temperature interval in ethanol (313-333 K). 
The study of the temperature influence on the interaction velocity of TPP and 
ECG proves that the temperature which is more then 10
0
increases the interaction 
velocity in 3 times, and its dependence on the temperature is under the value in 
accordance with Arenius equation. The effective energy of activation due to in 
ethanol is 12,79 kkal/mol, that is the same with the activation energy according to 
Menshutkin reaction and is the 1-st stage of the process. Thus we may suppose that 
Menshutkin reaction is the limited stage of the process. 
The study of viscosity proved that it is the typical polyelectrolyte and the 
dependence of c/n from C for water solvents of the synthesized polyelectrolytes is 
of linear character which proves that water solvents behavior is described by Fuoss 
- Strauss equation. 
The molecular mass of polymers was determined by the method of high - speed 
sedimentation using the equation of Flory - Mandelkern which was equal to 51000. 
Thus on the basis of kinetic, spectral and chemical methods the reaction of 
intereaction ECG and TPP soas proposed polymerization process capable to 
receive the catione polyelectrolyte, contained in the side chains, the quarterized 
groups were shown 

Download 1,33 Mb.

Do'stlaringiz bilan baham:
1   ...   24   25   26   27   28   29   30   31   ...   71




Ma'lumotlar bazasi mualliflik huquqi bilan himoyalangan ©hozir.org 2024
ma'muriyatiga murojaat qiling

kiriting | ro'yxatdan o'tish
    Bosh sahifa
юртда тантана
Боғда битган
Бугун юртда
Эшитганлар жилманглар
Эшитмадим деманглар
битган бодомлар
Yangiariq tumani
qitish marakazi
Raqamli texnologiyalar
ilishida muhokamadan
tasdiqqa tavsiya
tavsiya etilgan
iqtisodiyot kafedrasi
steiermarkischen landesregierung
asarlaringizni yuboring
o'zingizning asarlaringizni
Iltimos faqat
faqat o'zingizning
steierm rkischen
landesregierung fachabteilung
rkischen landesregierung
hamshira loyihasi
loyihasi mavsum
faolyatining oqibatlari
asosiy adabiyotlar
fakulteti ahborot
ahborot havfsizligi
havfsizligi kafedrasi
fanidan bo’yicha
fakulteti iqtisodiyot
boshqaruv fakulteti
chiqarishda boshqaruv
ishlab chiqarishda
iqtisodiyot fakultet
multiservis tarmoqlari
fanidan asosiy
Uzbek fanidan
mavzulari potok
asosidagi multiservis
'aliyyil a'ziym
billahil 'aliyyil
illaa billahil
quvvata illaa
falah' deganida
Kompyuter savodxonligi
bo’yicha mustaqil
'alal falah'
Hayya 'alal
'alas soloh
Hayya 'alas
mavsum boyicha


yuklab olish