Ntuj roj hmab. piav qhia

Ntuj roj hmab yog ib tug amorphous lub cev, muaj lub peev xwm los crystallize. Ntuj cov ntaub ntawv uas (tsis kho) - tsis muaj kob los yog dawb carbon. Ntuj roj hmab yog tsis soluble nyob rau hauv dej cawv, dej, acetone thiab lwm yam khoom ua kua. Lub fatty hydrocarbons thiab aromatics (ethers, benzene, roj av, thiab lwm tus) nws swells thiab yaj tom qab. Raws li ib tug tshwm sim, tsim colloidal kev daws teeb meem, uas yog dav siv nyob rau hauv cov kev xav tau kev pab.

Ntuj roj hmab muaj ib tug uniform molecular qauv. Cov khoom muaj ib tug high cev thiab kev siv technology tshiab yam ntxwv, nkag tiav rau pa khoom.

Ntuj roj hmab muaj siab elasticity (elasticity). Cov khoom yog tau rov qab nws yeej zoo thaum nws tsis cuam tshuam cov rog uas tshwm sim los nws deformation. Peb yuav tsum hais tias elasticity yog muab khaws cia tseg nyob rau hauv ib tug txaus wide kub ntau. Txawm li cas los, ntev-lub sij hawm cia ua hardening ntawm cov khoom.

Ntuj roj hmab ntawm Rho tawm ib puas cuaj caum tsib degrees pob tshab thiab txhav, ntawm ib tug kub ntawm nruab nrab ntawm xoom thiab kaum degrees - opaque thiab nkig, nrog nees nkaum - translucent, elastic thiab mos mos. Thaum rhuab saum toj no 50 ° C cov khoom yuav yas thiab nplaum.

Loses nws elasticity nws nyob rau eighty degrees thiab ib puas thiab nees nkaum degrees, nws mus rau hauv retinoid kua xeev, tom qab ntawm qhov chaw kawm kom tau cov thawj cov khoom tsis yooj yim sua. Thaum lub kub ntawm lub nce mus txog ob puas tsib caug rau ob puas degrees, tej yam ntuj tso roj hmab pib decompose. Cov no ib tug xov tooj ntawm cov kua thiab gaseous tshuaj.

Ntuj roj hmab yog ib tug zoo insulator. Tsis tas li ntawd, cov khoom muaj ib tug uas tsis muaj roj thiab dej kuj.

Khoom sufficiently maj mam oxidized los ntawm atmospheric oxygen. Sai txheej txheem yuav siv sij hawm qhov chaw nyob rau hauv tus ntawm tshuaj oxidants.

Tsis tas li ntawd tag nrho cov lwm yam khoom, roj hmab muaj plasticity. Nws yog tau khaws nws zoo lawm, uas twb kis tau nyob rau hauv tus ntawm lwm yam. Plasticity, uas manifests nyob rau hauv lub machining thiab cua sov yog ib tug ntawm cov qhov txawv cov yam ntxwv ntawm cov khoom. Vim lub fact tias cov roj hmab muaj elastic thiab yas zog, nws tseem hu ua ib tug plasto-elastic khoom.

Ntuj roj hmab uas nws mis - (C5H8) n, muaj xws li molecules muaj ib tug loj tus naj npawb ntawm ob bonds. Khoom yooj yim heev reacts nrog ntau yam. Nce reactivity vim cov tshuaj xwm ntawm lub unsaturated khoom. Qhov zoo tshaj plaws kev sis raug zoo tshwm sim nyob rau hauv cov kev daws teeb meem nyob rau hauv uas cov roj hmab muaj lub molecules ntawm kuj loj colloidal hais.

Tensile los yog txias yog hloov cov ntaub ntawv uas mus rau ib tug crystalline lub xeev ntawm lub amorphous (crystallization). Qhov no txoj kev yuav siv sij hawm qhov chaw nyob rau hauv ib lub sij hawm, tsis instantly. Lub muaju muaj ib tug me me luaj li cas, indefinite geometrical zoo, thiab ntawm cov npoo ntawm lawv fuzzy.