Halitta roba. description

Halitta roba ne wani amorphous jiki, ciwon da ikon crystallize. Natural kayan (untreated) - colorless ko fari carbon. Halitta roba ne ba mai narkewa a cikin barasa, da ruwa, acetone da sauran taya. The m hydrocarbons da aromatics (ethers, benzene, fetur, da sauransu) shi ta kumbura, kuma dissolves baya. A sakamakon haka, kafa colloidal mafita, wanda ake amfani da ko'ina a cikin fasaha da bukatun.

Halitta roba yana da wani uniform kwayoyin tsarin. A kayan yana da babban jiki da kuma fasaha halaye, readily aka sarrafa a kan al'ada kayan aiki.

Halitta roba yana da babban elasticity (elasticity). The abu ne iya mai da asalin siffar lokacin da shi ba da tasiri ga sojojin da ya sa ta nakasawa. Ya kamata mu ce cewa elasticity an riƙe a isasshe m zazzabi range. Duk da haka, dogon lokacin da ajiya triggers hardening na kayan.

Halitta roba a debe ɗari da casa'in da biyar digiri m, kuma m, a zazzabi na tsakanin sifili da goma digiri - opaque kuma gaggautsa, tare da ashirin - translucent, na roba da kuma taushi. Lokacin da ya kona sama da 50 ° C da kayan zama roba da kuma m.

Hasarar da elasticity shi a tamanin darajõji, kuma mutum ɗari da ashirin da digiri, shi da ke shiga retinoid ruwa a jihar, bayan kafa don samun asali samfurin ba zai yiwu ba. Lokacin da yawan zafin jiki yakan zuwa ɗari biyu da hamsin zuwa da ɗari biyu da darajõji, halitta roba fara decompose. A sakamakon haka ne yawan ruwa da kuma gaseous abubuwa.

Halitta roba ne mai kyau insulator. Bugu da ƙari, abu yana da wani low gas da kuma ruwa juriya.

Material isasshe sannu a hankali oxidized da yanayi oxygen. Sauri aiwatar faruwa a ƙarƙashin rinjayar sinadaran oxidants.

Har ila yau, duk wasu Properties, roba yana da plasticity. Shi ne iya ta riƙe da siffar, wanda aka samu a ƙarƙashin rinjayar waje dalilai. Plasticity, wanda bayyana a cikin machining da kuma dumama ne daya daga cikin bayãnin hukuncin halaye na kayan. Saboda gaskiya cewa roba yana da roba da kuma roba Properties, shi ne kuma ya kira wani plasto-na roba abu.

Halitta roba wanda dabara - (C5H8) n, ya hada da kwayoyin dauke da babban yawan biyu shaidu. Abu quite sauƙi reacts da yawa abubuwa. Karuwan reactivity saboda da sinadaran halitta na unsaturated abu. Mafi hulda auku a cikin wadanda mafita a cikin abin da roba dauke da kwayoyin na gwada manyan colloidal barbashi.

Tensile ko sanyaya aka canja wurin abu zuwa wani crystalline jihar daga amorphous (crystallization). Wannan tsari faruwa a cikin wani lokaci, ba nan take. A lu'ulu'u da kananan size, m geometrical siffar, da kuma gefuna da mai hazo.