-izoxianurat cua m- tolylizoxianat
- izoxianurat cua 2,4_toluendiizoxianat(chua cong b& v~ poliizoxianat)
Cac san phfun d\lQ'c nh~ danh bAng cac phuung phap v~t It :
di~m Dong chily, ph6 h6ng ngol.ii va phan tich nguyen to ; va phUO'ng phiip bOa hQc.
Dii khilo sat dgng hQc phan img trime hoa vong cua chUng dwi
dit!u ki~n XTCP d\lQ'c ma tru6'c dAy chua c6 cling b6, kha-o sat hi~u (mg
dii;n tic cua cac nhom th~ tren nhan thom va tim hi~u v~ cCJ'ch~ chung cua chUng trong moi trwng d! tu6'ng, va dii tham do vai img d1,U1g izoxianurat cua 2,4-TDI trong vi~c ch~ tl;lo vecni va chAt kat dinh poliuretan hai thanh ph§'n.
Thong qua cac k~t qua dii thu d\lQ'c, chUng toi co th~ rut ra nhUng kbt lu~ sau day:
I - Ph\.lCJ'llgphIlp XTCP dii to ra hftu hi~u dbi vtYi phan (mg trime hoa vong cac chAt arylizoxianat. Di~u ki~n thvc hi~n phan {mg nh~ nhang va re ti~n (mc lac Aliquat 336, mubi NaCN, dung mai toluen, nhi~t dg phOng),
2 - Vai muOi NaCN trong di~u ki~n XTCP, dgng hQc phan (mg
trime hoa vong arylizoxianat thuQc b~c 2 theo n6ng dQ cua maDame tUO'ng tv nhu trong tru6'ng hgp phan (mg d\lQ'C thvc hi~n trong di~u ki~n d6ng tutYng vai xuc lac co dl;lng ion. Di~u nay chUng to rAng anion CN-, dong vai tro mc lac dl;lng ion, duQ'c dua vao pha hfru cCJ'dwi d<.lng (Q+, CN-] dii dl;lt trj s6 can bAng v~ n6ng dQ. va muc can bAng nay khOng thay d6i dang k~ trong khoang nhii;t dg khilo sat.
3 - Cac thong sO ho<.lt hoa Lilli" va uS:!: trong di~u kii;n XTCP cua pMn (mg trime bOa vang arylmonoizoxianat pM hQ'p vai thCr tv ho<.lt tinh clm chUng - nghi~m dUng phuCJ'ng trinh Hammett.
ThOng sf, ho~t hoa Lili:t trong di~u ki~n XTCP cua trime hoa vong 2.4-TDI tUO'ng dUO'l1gv&i cac thOng sf, ho~t
diim ki~n d6ng tu&ng dii dU'Q'cc6ng b6.
4 - Co- ch~ chung d~ ngh! cho phan (mg trime hOa vong arylizoxianat dum di~u ki~n d! tu&ng XTCP c\lng tuO'ng t1,1"nhu cO' ch~ cua chUng trong trmmg hQ1>dOng tu&ng dUng xUC tilc co d~g ion.
V&i arylmonoizoxianat. khi nhom th~ cang rut di~n Hr. thi 0- tr~ng
thai chuylm ti~p cua S1,1"trime bOa cang co S1,1"t~o n6i nhi~u. tUO'llg (mg
v&i tri sf, cua thOng sf, Lili:t Cling it dlIO'ng va 6s:t cang am.
5 - San phAro izoxianurat cua 2.4-TDI thu duQ'C dum di~u ki~n
XTCP vftn con khOng b~n trong dii!u ki~n khi h~u Dong va Am u&t ; chi
co the giu- llll dinh 0- d1].ngdung djch trong dung moi t1"O'va khan ho~c
bi~n thanh nh(mg dftn xmlt cua no.
Viii tham do (mg d\ll1g san phAro trime hoa cua 2.4-TDI cho tMy: 6 - Vecni co mang bOng. d~t yeu du ve tinh ch.lt cO' 19".
7 - San phAro ch.lt ki!t dinh co dQ k~t dinh kha t6t. bell llu&C.
cbju duQ'c 0- nhi~t dQ th.lp va dilp (mg duQ'c nhUng yim du ve th&i gian s6ng va dong rfut.
ph3.n (mg hoa trong
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