Sei silicone yemvura ichigona kushandiswa zvakanyanya muminda yakasiyana-siyana?

1.Kutanga kwerabha resilicone remvura rine kuumbwa kwekuwedzera

Rabha resilicone remvura rine molding yekuwedzera rinoumbwa nevinyl polysiloxane sepolymer yekutanga, polysiloxane ine Si-H bond semushonga wekubatanidza, kana paine platinum catalyst, patembiricha yemukamuri kana pakupisa pasi pe cross linking vulcanization yemhando yezvinhu zvesilicone. Kusiyana nerabha resilicone remvura yakasanganiswa, molding liquid silicone vulcanization process haiburitse zvigadzirwa, shrinkage diki, deep vulcanization uye hapana ngura yezvinhu zvinosangana. Ine mabhenefiti emhando dzakasiyana dzekupisa, kuramba makemikari zvakanaka uye kuramba mamiriro ekunze, uye inogona kunamira nyore nyore kunzvimbo dzakasiyana-siyana. Saka, kana ichienzaniswa ne condensed liquid silicone, kugadzirwa kwe liquid silicone molding kuri kukurumidza. Parizvino, yave ichishandiswa zvakanyanya mumidziyo yemagetsi, michina, kuvaka, zvekurapa, mota nedzimwe nzvimbo.

2. Zvikamu Zvikuru

Polima yeBazi

Polysiloxane mbiri dzinotevera dzine vinyl dzinoshandiswa sema base polymers ekuwedzera liquid silicone. Kupararira kwavo kwehuremu hwemamorekuru kwakafara, kazhinji kubva pazviuru kusvika ku100,000-200,000. Base polymer inonyanya kushandiswa ye additive liquid silicone iα,ω -divinylpolydimethylsiloxane. Zvakaonekwa kuti huremu hwemamorekuru uye huwandu hwevinyl hwema basic polymers zvinogona kuchinja hunhu hwe liquid silicone.

mumiririri wekubatanidza

Chinhu chinoshandiswa pakuwedzera silicone yemvura inonyungudika ipolysiloxane yeorganic ine maSi-H bonds anopfuura matatu mumorekuru, akadai se linear methyl-hydropolysiloxane ine boka reSi-H, ring methyl-hydropolysiloxane uye MQ resin ine boka reSi-H. Chinonyanya kushandiswa i linear methylhydropolysiloxane yechimiro chinotevera. Zvakaonekwa kuti hunhu hwemuchina hwesilica gel hunogona kuchinjwa nekuchinja huwandu hwehydrogen kana chimiro che cross linking agent. Zvakaona kuti huwandu hwehydrogen hwe crosslinking agent hunoenderana nesimba rekusimba uye kuomarara kwesilica gel. Gu Zhuojiang nevamwe vake vakawana mafuta esilicone ane hydrogen ane chimiro chakasiyana, huremu hwakasiyana hwemolecular uye huwandu hwehydrogen hwakasiyana nekuchinja maitiro ekugadzira uye fomura, uye vakaishandisa se crosslinking agent kugadzira nekuwedzera liquid silicone.

chikatutirisi

Kuti zvivandudze kushanda zvakanaka kwe catalytic kwema catalysts, platinum-vinyl siloxane complexes, platinum-alkyne complexes uye nitrogen-modified platinum complexes zvakagadzirwa. Kuwedzera kune rudzi rwe catalyst, huwandu hwezvigadzirwa zve liquid silicone huchakanganisawo mashandiro. Yakaona kuti kuwedzera huwandu hwe platinum catalyst kunogona kukurudzira cross-linking reaction pakati pe methyl groups uye kudzivirira kuora kwe main chain.

Sezvambotaurwa pamusoro apa, nzira yekushandura vulcanization ye silicone yechinyakare yekuwedzera mvura ndeyekuita kwehydrosilylation pakati pe base polymer ine vinyl uye polymer ine hydrosilylation bond. Kuumbwa kwechinyakare kwesilicone yekuwedzera mvura kunowanzoda mold yakaoma kuti igadzire chigadzirwa chekupedzisira, asi tekinoroji iyi yekugadzira yechinyakare ine zvayakaipira zvekudhura zvakanyanya, kwenguva yakareba, nezvimwewo. Zvigadzirwa hazviwanzo shanda kuzvigadzirwa zvemagetsi. Vaongorori vakaona kuti nhevedzano ye silicas ine hunhu hwakanaka inogona kugadzirwa nenzira itsva dzekurapa uchishandisa mercaptan - double bond addition liquid silicas. Hunhu hwayo hwakanaka hwemakanika, kugadzikana kwekupisa uye kufambiswa kwechiedza zvinogona kuita kuti ishandiswe muminda mitsva. Zvichibva pakuita kwe mercapto-ene bond pakati pe branched mercaptan functionalized polysiloxane uye vinyl terminated polysiloxane ine huremu hwakasiyana hwemamorekuru, silicone elastomers ine adjustable hardness uye hunhu hwemakanika dzakagadzirwa. Elastomers dzakadhindwa dzinoratidza high printing resolution uye hunhu hwakanaka hwemakanika. Kureba kwesilicone elastomers pakuputsika kunogona kusvika 1400%, iyo yakanyanya kupfuura maUV curing elastomers akataurwa uye yakatopfuura masilicone elastomers anotambanudzwa zvakanyanya. Zvadaro masilicone elastomers anotambanudzwa zvakanyanya akaiswa kumahydrogels akaiswa macarbon nanotubes kugadzira zvishandiso zvemagetsi zvinotambanudzwa. Silicone inodhindwa uye inogadziriswa ine mikana yakawanda yekushandiswa mumarobhoti akapfava, maactuator anochinjika, maimplants ekurapa nedzimwe nzvimbo.