Kugadziriswa Kwemuviri kwePolypropylene
Kuwedzera zvinowedzerwa zve organic kana inorganic kuPP ( polypropylene ) matrix panguva yekusanganisa nekubatanidza kuti pave nezvinhu zvakagadzirwa nePP zvine simba guru. Nzira huru dzinosanganisira kugadzirisa kuzadza nekubatanidza.
Kuzadza kugadzirisa
Mune PP molding process, mafirita akadai sesilicates, calcium carbonate, silica, cellulose, uye girazi fibers anowedzerwa kune polymer kunatsiridza kupisa kupisa, kuderedza mitengo, kuwedzera kuoma, uye kuderedza kuumbwa kwePP. Nekudaro, iyo simba rekuita uye kurebesa kwePP kunoderera. Girazi faibha, seyakanakisa inorganic isiri-simbi whisker, ine mutengo wakaderera, yakanaka insulation, kudzivirira kupisa, kusaita ngura, uye yakakwirira mechanic simba. Inoshandiswa zvakanyanya, uye kuita kwePP kwakagadziridzwa negirazi fiber kuzadza kunovandudzwa zvakanyanya. Nekudaro, kana iyo girazi fiber yemukati inosvika makumi matatu muzana, iyo mechanic zvimiro zvezvinhu zvinogona kuvandudzwa zvakanyanya. Kuwedzeredza kuwedzera kwegirazi fiber kunogona kukonzera kusakwana kupinza kweimwe girazi faibha, zvichiita kuti kusashanda zvakanaka kwekubatana pakati pepolymer matrix uye girazi fibers, zvichikonzera kudzikira kwesimba remuchina wezvinhu zvinoumbwa. Uyezve, sezvo iyo girazi fiber yemukati inowedzera, kuyerera kweiyo composite zvinhu kunodzikira, zvichikonzera kuoma mukuumbwa kwePP uye kugadzirisa.
Kusanganiswa kwekugadzirisa
Kubatanidza PP (polypropylene) ne polyethylene, engineering mapurasitiki, thermoplastic elastomers kana rabha kuvandudza kushanda kwePP. Kugadziridza kusanganisa kunopedzwa mukugadzira michina yakaita semusanganiswa wemukati, mill yakavhurika, uye extruder. Iyo nzira iri nyore kudzora, ine pfupi yekugadzira kutenderera, uye yakaderera mutengo, uye inogona kuvandudza akasiyana siyana ePP akadai se colorability, processability, antistatic zvivakwa, uye kukanganisa kuramba. Kusanganiswa kwepolymer kunogona kushandisa zvakazara izvo zvakatanhamara zvechikamu chimwe nechimwe, kugadzirisa zvikanganiso zvechimwe nechimwe chikamu, uye zvakanyanya kunatsiridza mashandiro akazara emusanganiswa. Nekudaro, iyo yakaderera-tembiricha kuramba uye kuramba kuchembera kwePP yakasanganiswa haisati yakwana. Munguva yekubatanidza gadziriso, shear simba rinogona kuita kuti mamwe macheni akakura mamorekuru achekwe uye agadzire mahara radicals, ayo anogona kugadzira graft kana block copolymers uye zvinobudirira kuita seanopindirana ePP.
PP yekugadziridza tekinoroji yakawedzera zvakanyanya nzvimbo yekushandiswa yezvinhu zvakaumbwa uye yakavandudza mutengo-unoshanda wezvigadzirwa, yakasimudzira maitiro einjiniya ePP, uye yakawedzera kushandiswa kwayo kubva kumapurasitiki akajairwa kuenda kumapurasitiki einjiniya. Mumakore achangopfuura, kutsvagisa nekuvandudza tekinoroji yePP yekugadziridza kwakakura nekukurumidza, uye matekinoroji mazhinji uye mazhinji akaiswa mukugadziridzwa kwePP, iyo yakavandudza zvakanyanya kuita kwakazara kwePP uye nekuenderera mberi nekuwedzera ndima yayo yekushandisa, ine tarisiro yakakura yebudiriro.
Kusimbisa kuchinjwa
Kuwedzera zvinhu zvefibrous kumapurasitiki zvinogona kuvandudza zvakanyanya kusimba kwemidziyo yepurasitiki, nekudaro zita rekusimbisa shanduko. Zvishandiso zvine yakakura dhayamita-kusvika-ukobvu reshiyo zvinogona kuvandudza zvakanyanya kubhenda modulus (kuoma) kwezvinhu zvepurasitiki, izvo zvinogona zvakare kunzi reinforcement modification.
Zvinhu zvekusimbisa zvinonyanya kushandiswa mukusimbisa kugadziriswa kwePP (polypropylene) igirazi fiber uye zvigadzirwa zvayo, pamwe chete nekabhoni fiber, organic fiber, boron fiber, whiskers, etc. Pakati pavo, magirazi egirazi anoshandiswa mugirazi fiber yakasimbiswa PP ndeye kazhinji asiri-alkali girazi faibha uye epakati-alkali girazi faibha, ane asiri-alkali girazi faibha ane uwandu hukuru. Iyo dhayamita yegirazi fibers inodzorwa mukati meiyo 6-15μm, uye kureba kwegirazi fibers kunofanirwa kuvimbiswa kuve mukati me 0.25-0.76mm, iyo inogona kuve nechokwadi chekushanda kwechigadzirwa uye kuita kuti magirazi egirazi akapararira zvakanaka.
Zvinowanzotendwa kuti kureba kwegirazi fibers muchigadzirwa kunofanirwa kunge kwakakura kupfuura 0.2mm kuve nekugadzirisa maitiro. Girazi fiber yemukati (chikamu chezhinji) chakanakisa pakati pe10% ne30%, uye kuita kunoderera kana kwapfuura 40%. Uye zvakare, kuwedzera organosilane coupling agents kunogona kugadzira girazi fiber uye PP kuumba yakanaka interface, kunatsiridza kubhenda modulus, kuomarara, mutoro deformation tembiricha, uye kunyanya dimensional kugadzikana kweiyo composite system. Girazi faibha yakasimbiswa PP inogona kuvandudza simba remuchina uye kupisa kupisa, uye kuramba kwayo kumhute yemvura, kemikari corrosion, uye zvinokambaira zvakare zvakanaka. Inogona kushandiswa semapurasitiki einjiniya muzviitiko zvakawanda, senge mashizha e fan, heater grilles, impellers, lampshades, mavira emagetsi, uye heater dzimba, nezvimwe.
Kunyange zvazvo kugadzirwa kwepolypropylene kuri kukurumidza kuwedzera, kushanda kwayo kuri kuramba kuchivandudza, zvichiita kuti kushandiswa kwayo kuwedzere uye kudzika kunoramba kuchichinja. Mumakore achangopfuura, mamwe marudzi matsva epolypropylene ane zvimiro zvakasiyana akabuda, akadai sepachena polypropylene uye yakakwirira-yakanyunguduka-simba polypropylene, kungave kuburikidza nekuvandudzwa kwepolymerization reaction kana matanho anotorwa panguva yegranulation mushure me polymerization.
