Lub zog tensile: tseem hu ua tensile zog. Nws yog hais txog lub zog yuav tsum tau nyob rau hauv ib cheeb tsam rau roj hmab kom elongate mus rau ib tug tej yam ntev, uas yog, elongate mus rau 100%, 200%, 300%, 500%. Qhia hauv N / cm2. Qhov no yog qhov taw qhia tseem ceeb ntawm kev ntsuas lub zog thiab toughness ntawm roj hmab. Qhov loj dua nws tus nqi, qhov zoo dua cov roj hmab resilience, qhia tias hom roj hmab no tsis tshua muaj elastic deformation.
kua muag tsis kam: Yog tias cov khoom siv roj hmab muaj cov kab nrib pleb thaum siv, lawv yuav tsim kua muag nyuaj thiab nws thiaj li ua rau tawg. Yog li tsim kua muag kuj yog ib qho tseem ceeb ntawm kev ua tau zoo ntawm cov khoom siv roj hmab. Tear resistance feem ntau yog ntsuas los ntawm tus nqi tsim kua muag, uas yog hais txog lub zog yuav tsum tau rau ib chav tsev tuab (cm) ntawm roj hmab los rhuav ntawm qhov txiav kom txog thaum nws tawg, ntsuas hauv N / cm. Tau kawg, qhov loj dua tus nqi, qhov zoo dua.
Adhesion thiab adhesion zog: Lub zog yuav tsum tau cais ob qhov sib txuas ntawm cov khoom siv roj hmab (xws li cov kua nplaum thiab cov ntaub los yog cov ntaub thiab ntaub) hu ua adhesion. Qhov loj ntawm adhesion feem ntau yog ntsuas los ntawm adhesion lub zog, uas yog qhia raws li lub sab nraud quab yuam yuav tsum tau nyob rau hauv ib chav tsev cheeb tsam thaum lub ob daim ntawv cog lus qhov chaw ntawm cov qauv yog sib cais. Chav ntsuas yog N / cm lossis N / 2.5cm. Adhesive zog yog ib qho tseem ceeb ntawm kev ua tau zoo ntawm cov khoom siv roj hmab ua los ntawm cov paj rwb lossis lwm cov ntaub fiber ntau raws li cov khoom siv pob txha, thiab tau kawg, qhov loj dua tus nqi, qhov zoo dua.
Hnav poob: kuj hu ua ib qho kev txo qis, yog lub ntsiab lus zoo rau kev ntsuas qhov hnav tsis kam ntawm cov khoom siv roj hmab, thiab muaj ntau txoj hauv kev rau kev ntsuas thiab qhia nws. Tam sim no, Tuam Tshoj feem ntau siv Akron abrasion xeem txoj kev, uas muaj kev sib txhuam ntawm cov roj hmab log thiab cov qauv hardness sib tsoo log (Shore 780) nyob rau hauv ib tug tej yam inclination lub kaum sab xis (150) thiab ib tug tej yam load (2.72kg) los txiav txim qhov hnav. cov roj hmab nyob rau hauv ib qho kev mob stroke (1.61km), qhia hauv cm3/1.61km. Qhov me me no tus nqi, qhov zoo dua qhov hnav tsis kam ntawm cov roj hmab.
Brittle kub thiab iav hloov kub: Cov no yog cov ntsuas zoo rau kev txiav txim siab txias ua haujlwm ntawm roj hmab. Roj hmab yuav pib tawv hauv qab xoom degrees Celsius thaum noj, txo nws cov elasticity zoo heev; Raws li qhov kub thiab txias tseem txo qis, nws maj mam hardens mus rau qhov chaw uas nws elasticity ploj tag, ib yam li iav, uas yog nkig thiab tawv, thiab tuaj yeem tawg thaum muaj kev cuam tshuam. Qhov ntsuas kub no yog hu ua iav hloov qhov kub, uas yog qhov ntsuas kub qis tshaj plaws rau roj hmab. Hauv kev lag luam, qhov hloov pauv iav feem ntau tsis ntsuas (vim lub sijhawm ntev), tab sis ntsuas qhov kub thiab txias. Qhov kub ntawm cov roj hmab pib tawg tom qab khov ntawm qhov kub thiab txias rau ib lub sijhawm thiab raug rau ib qho kev quab yuam sab nraud yog hu ua qhov kub thiab txias. Lub nkig kub feem ntau yog siab dua qhov kub hloov pauv iav, thiab qhov qis dua qhov kub thiab txias, qhov zoo dua qhov txias tsis kam ntawm cov roj hmab no.
Cracking kub: Tom qab cov roj hmab tau rhuab mus rau ib qho kub, cov colloid yuav tawg, thiab qhov kub no hu ua qhov kub ntawm qhov tawg. Qhov no yog qhov ntsuas kev ua tau zoo rau kev ntsuas qhov kub ntawm cov roj hmab. Qhov siab dua qhov kub ntawm qhov tawg, qhov zoo dua qhov kub ntawm cov roj hmab no. Qhov kev khiav hauj lwm qhov kub thiab txias ntawm cov roj hmab dav dav yog nruab nrab ntawm qhov kub thiab txias kub.
Anti o khoom: Qee cov khoom siv roj hmab feem ntau tuaj rau hauv cov khoom xws li kua qaub, alkali, roj, thiab lwm yam thaum siv, uas ua rau cov khoom siv roj hmab nthuav dav, qhov saum npoo los ua nplaum, thiab thaum kawg cov khoom raug muab pov tseg. Kev ua haujlwm ntawm cov khoom siv roj hmab hauv kev tiv thaiv cov teebmeem ntawm cov kua qaub, alkali, roj, thiab lwm yam yog hu ua anti o. Muaj ob txoj hauv kev los ntsuas qhov o ntawm cov roj hmab: ib qho yog muab cov roj hmab rau hauv cov kua nruab nrab xws li kua qaub, alkali, roj, thiab lwm yam, thiab tom qab qee qhov kub thiab sijhawm, ntsuas nws qhov hnyav (lossis ntim) nthuav dav. tus nqi; Qhov me me nws tus nqi, qhov zoo dua cov roj hmab tiv thaiv o. Lwm txoj kev yog qhia nws los ntawm qhov piv ntawm lub zog tensile tom qab immersion rau lub tensile lub zog ua ntej immersion, uas yog hu ua acid (alkali) kuj los yog roj kuj coefficient; Qhov loj dua qhov coefficient, qhov zoo dua cov roj hmab tiv thaiv o.
Kev laus coefficient: Lub aging coefficient yog qhov ntsuas qhov ua tau zoo uas ntsuas qhov kev laus ntawm cov roj hmab. Nws yog qhia raws li qhov piv ntawm lub cev thiab txhua yam khoom (lub zog tensile los yog cov khoom ntawm tensile lub zog thiab elongation) ntawm roj hmab tom qab kev laus ntawm ib tug tej yam kub thiab rau ib tug tej lub sij hawm ntawm lub sij hawm. Lub siab aging coefficient qhia tau zoo aging kuj ntawm cov roj hmab no.
Post lub sij hawm: Dec-06-2024
