Kev sib ntsib ntau dua li yog qhov tseem ceeb rau kev pom zoo thiab kev txhawj xeeb. Thaum ua cov khoom siv rau kev txhawj xeeb, kev sib ntsib cov khoom siv rau PCR, thiab kev sib ntsib cov khoom siv rau kev pom zoo rau kev txhawj xeeb rau kev sib ntsib ntau dua li yuav cuam tshuam rau kev txhawj xeeb thaum ua kev txhawj xeeb...
Saib ntxiv
Cov khoom siv rau kev sib ntsib yog qhov tseem ceeb rau kev txhawj xeeb, kev ua haujlwm nyob rau hauv lub tsev kho mob thiab lub tsev ua siab. Cov kev txhawj xeeb ntawm lawv yog qhov tseem ceeb rau kev txhawj xeeb ntawm cov lus pom, tab sis lawv tsuas yog kev txhawj xeeb thaum muaj kev puas tsuaj. Ib qho khoom siv rau kev sib ntsib uas tsis tau ua kom zoo...
Saib ntxiv
Nyob rau hauv kev sib piv cov lus qhia, kev txhawb kev tshawb fawb rau kev tshawb fawb ntawm kev tshawb fawb, kev sib xyaw rau kev sib xyaw, thiab kev sib xyaw rau kev sib xyaw, kev sib xyaw rau kev sib xyaw yuav muaj kev sib koom nrog rau kev sib xyaw ntawm kev sib xyaw. Kev sib xyaw 1% tsis zoo dua los yog tsis zoo dua yuav ua rau kev sib xyaw tsis zoo...
Saib ntxiv
Kev sib xyaw rau kev sib xyaw yog qhov tseem ceeb rau kev sib xyaw rau kev sib xyaw rau lawv cov kev sib xyaw, uas muaj kev sib xyaw rau kev sib xyaw rau kev sib xyaw, kev sib xyaw rau kev sib xyaw, kev sib xyaw rau kev sib xyaw, thiab kev sib xyaw rau kev sib xyaw. Kev sib xyaw rau kev sib xyaw rau kev sib xyaw, uas tau ua los ntawm cov ntawv qhia thiab cov ntawv qhia, yog qhov nyuaj thiab qhov nyuaj...
Saib ntxiv
Kev xaiv cov kev sib xyaw rau kev sib xyaw yog qhov kev xaiv tseem ceeb rau txhua cov kev sib xyaw rau kev sib xyaw, kev sib xyaw, kev sib xyaw, thiab kev sib xyaw. Cov khoom uas tau xaiv zoo yuav pab paub zoo dua, pab paub zoo dua, thiab pab paub zoo dua. Cov khoom uas tsis xaiv zoo...
Saib ntxiv
Kev txhawb kev ntsuas kev txaus ntseeg yog qhov tseem ceeb rau kev coj qhov zoo ntawm cov khoom siv hauv ntau qhov kev lag luam—los ntawm kev kho cov ntawv thiab los ntawm kev tsim cov khoom siv polymer. Thaum lub cim ntsuas kev txaus ntseeg ntawm lub qhov cua yog qhov sib xyaw rau hauv cov rooj plaub lawm rau ntau xyoo, thiab kev ntsuas nyob rau hauv qhov cua yog qhov sib xyaw rau hauv cov rooj plaub lawm rau ntau xyoo, thiab kev ntsuas nyob rau hauv qhov cua yog qhov sib xyaw rau hauv cov rooj plaub lawm rau ntau xyoo...
Saib ntxiv
Rau ntau xyoo, kev ntsuas kev txaus ntseeg uas muaj kev tswj hwm yuav pab tau kev ua haujlwm ntawm cov rooj plaub lawm. Tiamsis, kev ntsuas no yog qhov muaj ntau dua kev siv lub sijhawm, xav tau ntau dua kev siv lub cev, thiab tsis siv tau rau kev ntsuas ntau dua...
Saib ntxiv
Qhov tseem ceeb tshaj plaws ntawm cov khoom siv uas muaj qhov ntsuas yog kev txaus ntseeg. Kev txaus ntseeg txhawb kom cov khoom siv yuav pab tau kev txuas, kev tso, kev tshuab, kev tshuab, thiab kev ua haujlwm. Yog tias kev ntsuas kev txaus ntseeg tsis zoo, nws yuav pab tau kev puas tsuaj rau cov khoom siv, kev tsis zoo rau cov neeg siv khoom, thiab kev muaj ntau dua kev siv lub sijhawm...
Saib ntxiv
Kev txhais qhov viscosity yog qhov tseem ceeb rau kev saib xyuam qhov zoo ntawm ntau yam qhov chaw siv hluav taws, polymer, thiab ntau yam lwm yam chaw siv hluav taws thiab kev siv hluav taws rau kev siv hluav taws. Tiamsi, cov viscometers tsis muaj ib yam li cov lwm. Ob qhov tseem ceeb...
Saib ntxiv
Qhov zoo tau muaj nyob ntxiv rau thaum nws tsis tau ua los. Thaum tsis tau ua cov khoom plastic uas tau ua lawm, cov yam ntsiab li qhov loj ntawm cov molecules, qhov viscosity, qhov tso cua, thiab kev ua haujlwm tau muaj nyob ntxiv rau thaum nws tau ua los, los ntawm kev ua polymer...
Saib ntxiv
Qhov sijhawm uas cov khoom nyob, qhov stability, thiab kev ua haujlwm ntawm cov khoom rau cov sijhawm txaus, thiab lwm yam ntxiv, yog txhawm rau qhov nyab xeeb ntawm cov khoom, qhov tseem ceeb rau kev ua haujlwm ntawm cov khoom. Kev design ntawm cov khoom thiab cov sijhawm ntawm kev siv yog txhawm rau qhov nyab xeeb...
Saib ntxiv
Kev test intrinsic viscosity yog qhov tseem ceeb heev rau kev saib xyuam qhov quality ntawm cov polymer. Kev saib xyuam los ntawm tus neeg yog zoo thiab ntau dua, tab sis nws yog qhov nyuaj thiab muaj kev sib txhawb heev rau cov neeg sib different. Thaum no, cov meter digital intrinsic viscosity tau muab cim los...
Saib ntxiv
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