Paub daws teeb nyob rau hauv txoj kev kawm no, polyols xws li polytetrahydrofuran Diol (PTMG), Polyester Diol (taum pauv, PBA), Polycaproletane Diislmethanate (PCYRI), Naphtali Diisocyanate (NDI) thiab lwm yam Polyisocyanates thiab ntau txoj saw txuas tau siv los ua ke cam khwb cia polyurethane elasteane elasteane elasteane "~ 96) .Txhua cov lus xaus:
Mos seem qauv:Lub compression txias tsis kam coefficient ntawm PTMG Polyether Elastomers yog siab dua tias ntawm polyester (PCDL, thiab lwm yam zoo dua Ethere Ewher Kev Ua Si.
Molecular qhov hnyav ntawm cov si me me:Thaum lub cev hnyav molecular ntawm PTMG nce los ntawm 1000 rau 2900, lub compression tsis txaus ntseeg coefficiency coefficient trets kom tau txais ib lub ncov ntawm mn=2000.
Nyuaj ntu:The structural regularity of diisocyanate is sorted as PPDI ≈ NDI > TODI>MDI. Qhov siab dua qhov tsis tu ncua, ntau dua compression tsis zoo.Qhov ntau dua ntawm cov ntsiab lus ntawm lub zog (xws li nce siab nyob rau hauv cov kev ua tiav ntawm lub ntsej muag Kev tawm tsam coefficient.
Txheej Txheem Txhim Kho:Txoj kev npaj prepromerization / semi -}}}}}} kub}}} kub}}} kub - kub vulcanization (120℃/ 8h).
1.Analysisy hwm yuam kom muaj feem cuam tshuam
1.1 Tus qauv ntawm cov qauv muag segment
Polyether Vs Polyester: PTMG muaj ntau yam ntawm eteffer (xws li PBA tsuas yog 0.15), nws yog ib qho yooj yim rau crystallize ntawm tsawg kub.
1.2 Cawv ntawm cov roj molecular phaus ntawm cov tog plaub ntu
When the molecular weight of PTMG increases from 1000 to 2900, the compression cold resistance coefficient peaks at Mn=2000 (0.46).An increase in molecular weight will enhance the softness of the soft section, but too high (>2000) yuav ua rau muaj cov muaj zog thiab txo lub peev xwm ua kis las.
1.3 Qhov cuam tshuam ntawm cov txheej txheem nyuaj
Diisocyanate Hom:
| Diisocyanate | COMPRESSION BIGHTEAS DISTENCE NTSEEG | Rov qab tus nqi (%) |
|
MDI |
0.43 | 55 |
| Ppdi | 0.63 | 65 |
| Ndi | 0.62 | 68 |
| Todi | 0.58 | 61 |
Xaus: Tus qauv sib zog ntawm PPDI / NDI txhawb nqa cov kev ua haujlwm tsis tu ncua ntawm cov ntu nyuaj thiab txhim kho kom yooj yim txias.
Hom Saw Extender:
| Saw Extender | COMPRESSION BIGHTEAS DISTENCE NTSEEG |
| Tus ntses las | 0.43 |
| Hdo | 0.46 |
| Haqee | 0.52 |
| DEG | 0.18 |
Xaus: Cov saw txuas ntxiv muaj cov qauv rigid (thaum lub nplhaib Benno {}} etheret sib cais ua kom lub ntom ntom ntawm lub zog thaj chaw.
Cov ntsiab lus nyuaj cov ntsiab lus:Lub NCV KCO GRANCE feem ntawm cov kev npaj ua ntej nce los ntawm 8.5% rau 9.5%, qhov sib npaug ntawm cov mos mos tsis kam lees paub los ntawm 0.45, thiab lub hardness tau nce los ntawm 94a rau 96a.
1.4 Tus txheej txheem npaj npaj
Cov Qauv Hluavtaws:Lub compression tsis tuaj yeem ua tsis taus coefficients ntawm ib tug {{}}}}}} theem kev sib cais thiab ua kom zoo dua qub kev ua tau zoo.
Txheej txheem vulcanization:Tsawg - kub vulcanization (80) Qib / 82), txo qis dua ureefficization - 8}}}} theem sib cais.
2. Xaus
Mos segment opmentization:PTMG nrog mn =2000 yog nyiam dua li cov khoom muag muag substrate.
Nyuaj Seem Tsim:Xaiv lub siab -}}}}}}}} docococatesatesates such such such as as asocococococococococ as as as as as້ນ nawb)