Cov txheej txheem:
Video: Yuav ua li cas koj ua bouncy polymer pob?
2024 Tus sau: Miles Stephen | [email protected]. Kawg hloov kho: 2023-12-15 23:36
Rau ua bouncing polymer pob , ua raws li cov kauj ruam no: Sau ib khob "Borax Solution" thiab lwm yam " Pob Sib tov." Ncuav 2 tablespoons dej sov thiab 1/2 teaspoon ntawm borax hmoov rau hauv lub khob sau tias "Borax Solution." Do lawv cov mixture kom yaj cov borax, ntxiv cov zaub mov xim yog tias xav tau.
Nyob rau hauv tas li ntawd, dab tsi ua rau ib tug polymer bouncy?
Khw muag khoom rov qab pob yog ua ofrubber, lwm yam khoom uas yog ua up ntawm polymers . Thaum lub rov qab pob yog ncab, cov no polymer chains uncoil thiab straighten. Thaum tso tawm, cov chains coil thaub qab dua. Qhov no ua cov khoom stretchy thiab rov qab.
Tsis tas li ntawd, cov kua nplaum puas yog polymer? Koj tuaj yeem ua ib qho polymer -raws li cov khoom zoo ib yam li Silly Putty hauv tsev los ntawm kev sib xyaw ua ke dej, borax thiab Elmer's Kua nplaum . Elmer's yog tsim los ntawm polyvinyl acetate, uas yog asynthetic polymer . A polymer yog ib tug ntev molecule uas feem ntau yog ua los ntawm ntau yam zoo sib xws units.
Ib yam li ntawd, koj tuaj yeem nug, ua li cas koj ua cov pob bouncy yam tsis muaj borax?
Cov kauj ruam
- Nqa tag nrho koj cov pob kws, koj thawj feem (1 tablespoon thiab 1 teaspoon) dej, thiab koj cov zaub mov xim.
- Siv Popsicle stick yog pom zoo kom tau txais tag nrho koj cov sib tov tawm ntawm lub tais.
- Microwave koj qhov sib tov rau 20 vib nas this.
- Ntxiv koj qhov thib ob (1.5 teaspoon) ntawm dej rau lawv.
Dab tsi ntawm polymer yog lub pob bouncy?
Cov pob pob nyob rau hauv qhov kev ua no yog tsim los ntawm ib polymer . Polymers yog cov molecules ua los ntawm repeatingchemical units. Kua nplaum muaj cov polymer polyvinyl acetate (PVA), uas hla mus rau nws tus kheej thaum reacted nrog borax.
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