PLA, ihe na-emebi emebi, bụ polymer semi-crystalline nwere okpomọkụ na-agbaze ruo 180 ℃.Ya mere, gịnị kpatara ihe ahụ ji dị njọ na nguzogide okpomọkụ ozugbo emechara ya?
Isi ihe kpatara ya bụ na ọnụ ọgụgụ kristal nke PLA dị nwayọọ na kristal nke ngwaahịa ahụ dị ala na usoro nhazi na ịkpụzi nkịtị.N'ihe gbasara usoro kemịkalụ, agbụ molekụla nke PLA nwere -CH3 na atom carbon nke chiral, nke nwere usoro ihe ọkụkụ na-ahụkarị na obere ọrụ nke ngalaba yinye.Ike kristal nke ihe polymer nwere njikọ chiri anya na ọrụ nke yinye molekụla na ikike nucleation.Na usoro jụrụ oyi nke nhazi nhazi nkịtị, windo okpomọkụ nke kwesịrị ekwesị maka crystallization dị ntakịrị, nke mere na crystallinity nke ngwaahịa ikpeazụ dị ntakịrị na okpomọkụ deformation dị ala.
Ntughari nucleation bụ ụzọ dị irè iji mee ka kristal dị elu nke PLA dịkwuo elu, mee ka ọnụ ọgụgụ kristal dị ngwa ngwa, melite ihe onwunwe kristal ma si otú a na-abawanye nguzogide okpomọkụ nke PLA.Ya mere, mgbanwe nke ihe PLA dị ka nucleation, ọgwụgwọ okpomọkụ na crosslinking nwere ọrụ dị mkpa n'ịgbasa ngwa ngwa nke ngwaahịa PLA site n'ịbawanye okpomọkụ nrụrụ ya na imeziwanye okpomọkụ ya.
A na-ekewa ihe ndị na-emepụta ihe na-emepụta ihe n'ime ihe ndị na-emepụta ihe na-emepụta ihe na ihe ndị na-emepụta ihe.Ihe ndị na-emepụta ihe na-emepụta ihe na-agụnye phyllosilicates, hydroxyapatite na ihe mmepụta ya, ihe carbon na ndị ọzọ nanoparticles inorganic.Clay bụ ụdị ọzọ nke silicate ịnweta ihe ndị a na-ejikarị na mgbanwe PLA, n'ime nke montmorillonite bụ onye nnọchi anya.Ihe ndị na-emepụta ihe na-emepụta ihe ndị bụ isi bụ: ogige amide, bisylhydrazides na biureas, obere ụmụ irighiri biomass, organometallic phosphorus/phosphonate na polyhedral oligosiloxy.
Mgbakwunye ihe mgbakwunye nucleating dị mgbagwoju anya iji meziwanye nkwụsi ike ya dị mma karịa nke otu mgbakwunye.Ụdị mbibi bụ isi nke PLA bụ hydrolysis mgbe hygroscopic gasịrị, ya mere a pụkwara iji usoro ịgbaze agbaze, na-agbakwunye mmanụ dimethylsilicone hydrophobic na-agbakwụnye ihe onwunwe hygroscopic, na-agbakwụnye ihe mgbakwunye alkaline iji belata nbibi nke PLA site n'ịgbanwe uru PH nke PLA.
Oge nzipu: Nov-07-2022