Polypropylene utsotso pfungwa: unhu uye zvivako

Polypropylene ari thermoplastic polymer kuti propene. Izvi rakagadzirirwa maererano mabikirwo pamusoro polymerization kuti propylene kushandisa catalysts nesimbi. Kuti vawane zvinhu izvi parameters zvakafanana avo panguva iyo ikabereka yakakwirira arambe achirema polyethylene.

Zvichienderana worudzii tiwedzere kushandiswa, zvichiita kuti vawane chero mhando polymer kana wemisanganiswa dzaro. Utsotso pfungwa polypropylene - ndeimwe zvinokosha zvinoitwa ichi zvinhu. Rine mufananidzo chena upfu kana granules, unorema arambe achirema iyo ikaita 0, 5 g / cm³. The zvinorondedzerwa zvinhu anogona mavara, kana uncolored kudzikamiswa.

Magadzirirwo: samolecular mamiriro

Nokuti polypropylene ari samolecular mamiriro rakakamurwa akawanda mhando, pakati pavo:

• isotactic;
• ataxic;
• syndiotactic.

Stereoisomers zvinhu zvisingapindirani mumuviri, zvemaziso uye makemikari maitiro. Somuenzaniso, atactic polypropylene ane chimiro rabha-kufanana zvinhu, izvo maitire kumusoro fluidity. Utsotso pfungwa polypropylene nokuda extrusion hazvisi anenge 80 ° C, nepo arambe achirema inogona kusvika pamwero 850 makirogiramu / m³.

The diethyl Eteri mashoko urwa kwazvo. By ehupfumi isotactic polypropylene yakasiyana-pamusoro rakarondedzerwa uye ane yakakwirira modulus pamusoro elasticity, ayo arambe achirema rinosvika 910 makirogiramu / m³, apo kunyunguduka tembiricha anoda kubva 165 kusvika 170 ° C. In kwezvinhu polypropylene mhando iyi kunoratidzwa chakanakisisa nemishonga kuti makemikari.

Physical uye zvemaziso zvivako

Nhasi zvakajairika chaizvo kushandisa polypropylene. Utsotso pfungwa iyi akasiyana nomumwe kwemarudzi. Kazhinji, zviri anofananidzwa polyethylene, asi polypropylene hakusi mupristi arambe achirema, ndiyo 0,91 g / cm³. Uyezve, Polypropylene zvakaoma uye husingakwanisi abrasion, uye ndiyo husingakwanisi tembiricha.

Level Rinotanga kunyoroveswa panguva kumativi 140 ° C, nepo utsotso tembiricha rinosvika 175 ° C. Ngura Cracking mashoko haina pachena. Zvisinei, zviri akatsiga kusvikira oxygen chiedza, aikanganiswa ichi ipfupi kana zvokubikisa stabilizers zvichapiwawo muna zvaAtemisi polypropylene.

In siyana nzvimbo indasitiri inoshandisa marudzi akawanda polypropylene nhasi. Utsotso pfungwa iyi anowedzera nzvimbo chikumbiro. Elongation panguva yokumbozorora imwe chikamu inogona zvakasiyana kubva 200 kusvika 800%. Zvipirei simba mune makakatanwa wakaenzana nomuganhu 250 kusvika 350 kgf / cm². Impact simba pamwe notch anoda kubva 33 kusvika 80 kgf · masendimita / cm², nepo Brinell pokuoma riri pakati 6 uye 6,5 kgf / mm².

Huru mushonga ehupfumi

Kana uchironga kutenga zvimwe zvigadzirwa kubva polypropylene, utsotso pfungwa kwemashoko, unofanira kuzivikanwa. About wake kukurukurwa munyaya. Pairi unogona kudzidza uye mamwe makemikari zvivako. Somuenzaniso, mashoko ari mishonga kugadzikana mune zvinoita zvokufembedzwa uye chete zvishoma rukazara izvozvo. Kana tembiricha inokwira kusvika 100 ° C, iyo anonhuhwirira yeHydrocarbon zvinhu chikaparara. Muchiitiko ichi chiri mubvunzo toluene uye benzene.

Nokuti kuti polypropylene ine tertiary kabhoni maatomu, zviri husingakwanisi okisijeni pasi pokudzora ultraviolet mwaranzi uye akakwidziridzwa tembiricha. Izvi zvinokonzera katsika vakwegura achienzaniswa polyethylene. Nokupesvedzera hasha runyararo polypropylene hakusi nesimba polyethylene, iri pasi cracking walnut. Anokwanisa kusangana nemiedzo kuti cracking walnut kunyange pasi mupfungwa.

Utsotso kurehwa mapaipi polypropylene

Kazhinji, yazvino mutengi mubereko polypropylene utsotso tembiricha. Zvikwepa anonetseka, kana uchironga kuita nani ari kudziyisa hurongwa. Kana vachibatwa kutonhora 140 ° C, mashoko acho inova nyoro uye nokudaro anorasikirwa chimiro chayo. Asi kana tembiricha vanomutsirwa munhu azvipire 170 ° C, utsotso nhano kunoitika. Panguva iyoyo zvichaita regai kuva chakasimba uye havachakwanisi varambe chimiro chayo uye nokurondedzerwa.

Heating enyika zvakadaro tembiricha pamwero haina dzaona, saka mvura wemuTesitamende polypropylene sepombi vari dzakakodzera. Kazhinji, vagadziri vanoti kufadza zvinokwanisika tembiricha kuti mapaipi polypropylene ndiyo 95 ° C. Products angakudzivisai wakakwirira tembiricha pamwero, asi zvishoma. Kana mazhinji kushandisa nenyere panguva tembiricha kupfuura 100 ° C, upenyu hwavo basa achaita kutapudzwa.

Apo tembiricha anodonhedza polypropylene kuchaita dzinosiyana kukura. Kana neshungu, izvozvo kuchawedzera uye kutonhora - dzoka. Nokupesvedzera dzakakwirira mapaipi tembiricha angatanga sag pakati zvisungo uye rokunze layer uchaona kuzvimba.

Nuances vanoshandisa polypropylene sepombi

The kutsvaka ringashandiswawo mune midziyo polypropylene. Utsotso kurehwa senyere dzakadaro angava akasiyana. Izvi zvinofanira kuonekwa kana chigadzirwa pamberi penyu PN20 muchiso. Muchiitiko ichi chiri mutopota, kushanda tembiricha chiri 60 ° C. Asi kana totaura PN25 chigadzirwa, zvinoratidza kuti vachakwanisa kukurira tembiricha anosvika 95 ° C.

mhedziso

Nomucheka yakachengeteka kutaura kuti mvumo chisimbiso polypropylene utsi pedyo mumigodhi. Utsotso akajekerwa polypropylene Zvisinei, hariratidzi kuti mutopota rirege kudzivirirwa. Nyanzvi vanokurudzira kutenga yanyatsosimba zvigadzirwa, zviri zvishoma kubatwa deformation panguva pamatunhu tembiricha. Saka, pombi zvinofanira insulated uye akadzivirira anowedzera kuva paiva aruminiyamu kana Washington City Offices yomukati. Izvi zvinodzivirira nenyere kubva kuwedzera uye achawedzera upenyu hwavo basa.