Qhov sib txawv tseem ceeb ntawm polysiloxane thiab polydimethylsiloxane yog tias polysiloxane muaj silicon atoms txuas rau ob lub atoms oxygen thiab ob pawg alkyl, whereas polydimethylsiloxane muaj silicon atoms txuas rau ob lub oxygen atoms thiab ob pawg methyl.
Ob leeg polysiloxane thiab polydimethylsiloxane yog cov khoom siv silicone tseem ceeb. Lawv muaj cov tshuaj lom neeg thiab lub cev sib txawv nrog rau kev siv sib txawv.
YPolysiloxane yog dab tsi?
Polysiloxane lossis silicone yog cov khoom siv polymer uas muaj ntau pawg siloxane ua haujlwm thoob plaws hauv nws cov qauv. Nws yog lub npe hu ua polysiloxane vim muaj ntau ntawm siloxane rov ua haujlwm. Nws yog ib qho hluavtaws polymer uas tsis tshwm sim. Polysiloxane muaj cov pob txha, uas muaj Si-O bonds. Tsis tas li ntawd, muaj cov hlua txuas txuas rau lub pob txha no.
Daim duab 01: Silicone Siv tau los ua cov khoom sib khi
Feem ntau, polysiloxane raug suav hais tias yog cov khoom siv tsis zoo vim tias nws tsis muaj cov pa roj carbon hauv nws cov pob txha. Txij li thaum kev sib raug zoo ntawm Si-O muaj zog dua, cov pob txha pob txha muaj zog heev dua li cov pob txha muaj carbon. Vim tib qho laj thawj, cov khoom siv no tiv taus kub heev.
Feem ntau, silicone tiv taus cua sov thiab lwm yam kuab tshuaj. Nws yog cov khoom siv roj hmab zoo li thiab feem ntau yog siv los ua cov khoom siv sealant. Cov ntawv thov ntawm polysiloxane suav nrog kev siv nws ua cov sealant, lubricant, nplaum, tshuaj, khoom siv ua noj, thermal thiab hluav taws xob rwb thaiv tsev, thiab lwm yam.
YPolydimethylsiloxane yog dab tsi?
Polydimethylsiloxane yog ib hom silicone uas lub caj qaum ntawm lub polymer muaj silicon thiab oxygen atoms nrog rau ob pawg methyl txuas rau silicon atoms. Cov khoom no yog cov feem ntau siv siloxane polymer vim nws cov yam ntxwv txawv txav. Nws yog cov khoom siv kho qhov muag pom tseeb nrog inert, tshuaj lom thiab tsis-flammable.
Txhua qhov rov ua dua ntawm polydimethylsiloxane muaj ob pawg methyl txuas rau silicon atom. Lub silicon atom yog sib txuas rau ob lub pa oxygen atom hauv nws cov pob txha. Kev lag luam, cov khoom siv polymer no tuaj yeem ua los ntawm dimethyldichlorosilane.
Daim duab 02 Cov Qauv Tshuaj ntawm Polydimethylsiloxane
Polydimethylsiloxane yog cov khoom siv hydrophobic. Yog li ntawd, cov qauv ntawm cov polymer no tsis tso cai rau cov kuab tshuaj aqueous infiltrate thiab o ntawm cov khoom. Qhov no ua rau cov khoom siv no muaj txiaj ntsig zoo hauv kev sib xyaw nrog dej thiab cov kuab tshuaj cawv yam tsis muaj deformation.
Thaum xav txog cov ntawv thov ntawm polydimethylsiloxane, nws feem ntau yog siv los ua cov surfactant thiab ua tus neeg sawv cev antifoaming. Tsis tas li ntawd, nws muaj cov ntawv thov hauv hydraulic kua thiab lwm yam kev siv. Tsis tas li ntawd, peb tuaj yeem siv nws los ua cov khoom siv stamping thiab hauv kev sib txuas ntawm gecko adhesion.
Qhov txawv ntawm Polysiloxane thiab Polydimethylsiloxane yog dab tsi?
Qhov sib txawv tseem ceeb ntawm polysiloxane thiab polydimethylsiloxane yog polysiloxane muaj silicon atoms txuas nrog ob lub pa atoms thiab ob pawg alkyl, whereas polydimethylsiloxane muaj silicon atoms txuas nrog ob oxygen atoms thiab ob pawg methyl. Ntxiv mus, thaum xav txog cov khoom ntawm cov polymers, synthesis ntawm polysiloxane nyob ntawm hom alkyl pawg txuas nrog silicon atom; e.g. hydrolysis ntawm dimethyldichlorosilane yog alkyl pawg yog methyl. Rau polydimethylsiloxane ntau lawm, peb tuaj yeem tsim nws los ntawm dimethyldichlorosilane nyob rau hauv muaj dej thiab HCl.
Hauv qab infographic qhia ntxiv txog qhov sib txawv ntawm polysiloxane thiab polydimethylsiloxane.
Summary – Polysiloxane vs Polydimethylsiloxane
Ob leeg polysiloxane thiab polydimethylsiloxane yog cov khoom siv silicone tseem ceeb. Lawv muaj cov tshuaj sib txawv thiab lub cev sib txawv nrog rau kev siv sib txawv. Qhov sib txawv tseem ceeb ntawm polysiloxane thiab polydimethylsiloxane yog polysiloxane muaj silicon atoms txuas rau ob lub atoms oxygen thiab ob pawg alkyl, thaum polydimethylsiloxane muaj silicon atoms txuas rau ob lub pa oxygen atoms thiab ob pawg methyl.
