Impamvu yo Kurwanya Ubushyuhe Buke bwa PLA

PLA, ibinyabuzima bishobora kwangirika, ni polymer ya kimwe cya kabiri kristaline ifite ubushyuhe bugera kuri 180 ℃.None se kuki ibikoresho ari bibi cyane mukurwanya ubushyuhe bimaze gukorwa?

Impamvu nyamukuru nuko igipimo cyo korohereza PLA gitinda kandi kristu yibicuruzwa biri hasi mugikorwa cyo gutunganya no kubumba bisanzwe.Kubijyanye nimiterere yimiti, urunigi rwa molekuline ya PLA rurimo -CH3 kuri atome ya chiral carbone, ifite imiterere isanzwe ihindagurika hamwe nibikorwa bike byurunigi.Ubushobozi bwo korohereza ibikoresho bya polymer bifitanye isano rya hafi nigikorwa cyurunigi rwa molekile nubushobozi bwa nucleation.Muburyo bwo gukonjesha muburyo busanzwe bwo gutunganya, idirishya ryubushyuhe rikwiranye na kristalisiti ni rito cyane, kuburyo kristaliste yibicuruzwa byanyuma ari nto kandi ubushyuhe bwo guhindura ubushyuhe buri hasi.

Guhindura nucleaux nuburyo bwiza bwo kongera kristu ya PLA, kwihutisha igipimo cya kristu, kuzamura imitungo ya kristu bityo bikongerera ubushyuhe bwa PLA.Kubwibyo rero, guhindura ibikoresho bya PLA nka nucleation, kuvura ubushyuhe no guhuza ibikorwa bifite uruhare runini mu kwagura ibikorwa by’ibicuruzwa bya PLA byongera ubushyuhe bw’imiterere y’ubushyuhe no kuzamura ubushyuhe bwabyo.

Ibikoresho bya nucleaux bigabanijwemo ibintu bidafite ingufu hamwe ningingo ngengabuzima.Ibikoresho bya nucleaux organique birimo phyllosilicates, hydroxyapatite nibiyikomokaho, ibikoresho bya karubone nibindi bya nanoparticles.Ibumba nubundi bwoko bwibikoresho bya silikatike isanzwe ikoreshwa muguhindura PLA, muribyo montmorillonite ihagarariye cyane.Ibikoresho nyamukuru byingirakamaro ni: amide ivanze, bisylhydrazide na biureas, molekile ntoya ya biomass, organometallic fosifore / fosifone na oligosiloxy ya polyhedral.

Kwiyongera kwingirakamaro nucleating inyongera kugirango itezimbere ubushyuhe bwumuriro nibyiza kuruta ibyongeweho kimwe.Uburyo nyamukuru bwo kwangirika kwa PLA ni hydrolysis nyuma ya hygroscopique, bityo rero uburyo bwo kuvanga gushonga nabwo bushobora gukoreshwa, ukongeramo amavuta ya hydrophobique yongera amavuta ya dimethylsilicone kugirango ugabanye umutungo wa hygroscopique, wongeyeho alkaline yongerera imbaraga kugirango ugabanye igipimo cya PLA uhindura agaciro ka PH.