ʻO ka ʻokoʻa ma waena o ke ʻano polyether TPU a me ke ʻano polyester

ʻO ka ʻokoʻa ma waenaʻAno polyether TPUaʻano polyester

Hiki ke hoʻokaʻawale ʻia ka TPU i ʻelua ʻano: polyether type a me polyester type. E like me nā koi like ʻole o nā noi huahana, pono e koho ʻia nā ʻano TPU like ʻole. No ka laʻana, inā ʻoi aku ka kiʻekiʻe o nā koi no ke kūpaʻa hydrolysis, ʻoi aku ka maikaʻi o ka polyether type TPU ma mua o ka polyester type TPU.

No laila, i kēia lā, e kamaʻilio kākou e pili ana i ka ʻokoʻa ma waenaʻano polyether TPUapolyester type TPU, a pehea e hoʻokaʻawale ai iā lākou? E wehewehe ʻia kēia mau mea ma nā ʻano ʻehā: ʻokoʻa i nā mea maka, nā ʻokoʻa i kūkulu ʻia, nā hoʻohālikelike hana, a me nā ʻano ʻike.

1, ʻokoʻa i nā mea maka

Manaʻo wau he nui ka poʻe i ʻike i ka manaʻo o nā elastomers thermoplastic, nona kahi hiʻohiʻona o ka loaʻa ʻana o nā ʻāpana palupalu a paʻakikī, kēlā me kēia, e lawe mai i ka maʻalahi a me ka rigidity i ka mea.

Loaʻa iā TPU nā ʻāpana kaulahao palupalu a paʻakikī, a ʻo ka ʻokoʻa ma waena o ka TPU ʻano polyether a me ka TPU ʻano polyester aia i ka ʻokoʻa o nā ʻāpana kaulahao palupalu. Hiki iā mākou ke ʻike i ka ʻokoʻa mai nā mea maka.

Polyether type TPU: 4-4 '- diphenylmethane diisocyanate (MDI), polytetrahydrofuran (PTMEG), 1,4-butanediol (BDO), me ka nui o 40% no MDI, 40% no PTMEG, a me 20% no BDO.

Polyester type TPU: 4-4 '- diphenylmethane diisocyanate (MDI), 1,4-butanediol (BDO), adipic acid (AA), me ka helu MDI ma kahi o 40%, AA helu no kahi o 35%, a me BDO helu no kahi. 25%.

Hiki iā mākou ke ʻike i ka mea maka no ka polyether type TPU palupalu ʻāpana kaula polytetrahydrofuran (PTMEG); ʻO ka mea maka no nā ʻāpana kaulahao palupalu TPU ʻano polyester he adipic acid (AA), kahi e hoʻopili ai ka adipic acid me butanediol e hana i ka polybutylene adipate ester e like me ka māhele kaulahao palupalu.

2、 Nā ʻokoʻa hale

ʻO ke kaulahao mole o TPU he (AB) n-type block linear structure, kahi A he kiʻekiʻe molecular weight (1000-6000) polyester a polyether, ʻo B ka mea maʻamau butanediol, a ʻo ka hana kemika ma waena o nā ʻāpana kaulahao AB he diisocyanate.

Ma muli o nāʻano likeʻole o A, hiki ke hoʻokaʻawaleʻia ka TPU i ka polyester type, polyether type, polycaprolactone type, polycarbonate type, etc.

Mai ka kiʻi i luna aʻe, hiki iā mākou ke ʻike i nā kaulahao molekala holoʻokoʻa o ka polyether type TPU a me ka polyester type TPU he mau laina laina, me ka ʻokoʻa nui inā he polyether polyol a i ʻole polyester polyol ka māhele kaulahao palupalu.

3、 Hoʻohālikelike hana

ʻO nā polyether polyols nā polymers waiʻona a i ʻole nā ​​oligomers me nā paʻa eter a me nā pūʻulu hydroxyl ma nā pūʻulu hope ma ke ʻano o ke kaulahao nui. Ma muli o kona ikaika cohesive haʻahaʻa o nā paʻa ether i kona ʻano a me ka maʻalahi o ka hoʻololi.

No laila, hiki i ka polyether TPU ke hoʻololi maikaʻi loa i ka haʻahaʻa haʻahaʻa, ka pale hydrolysis, ka pale ʻana, ka pale ʻana o UV, a me nā mea ʻē aʻe.

Hiki i nā pūʻulu ester me ka ikehu hoʻopaʻa covalent ikaika i loko o nā polyester polyols ke hana i nā paʻa hydrogen me nā ʻāpana kaulahao paʻa, e lawelawe ana ma ke ʻano he mau wahi hoʻopili elastic. Eia nō naʻe, hiki i ka polyester ke haki ma muli o ka hoʻouka ʻana o nā molekele wai, a ʻo ka waikawa i hana ʻia e ka hydrolysis hiki ke hoʻoikaika hou i ka hydrolysis o ka polyester.

No laila, ʻoi aku ka maikaʻi o ka polyester TPU i nā waiwai mechanical, ʻaʻahu i ke kūpaʻa, ke kūʻē i ka waimaka, ke kūpaʻa corrosion kemika, ke kūpaʻa wela kiʻekiʻe, a me ka hana maʻalahi, akā maikaʻi ʻole ka pale hydrolysis.

4、 Kaʻina ʻike

No ka mea ʻoi aku ka maikaʻi o ka hoʻohana ʻana o TPU, hiki ke ʻōlelo ʻia he pono ke koho ʻia ma muli o nā koi kino o ka huahana. No ka loaʻa ʻana o nā waiwai mechanical maikaʻi, e hoʻohana i ka TPU polyester; Inā e noʻonoʻo ana i ke kumukūʻai, ka nui, a me ka hoʻohana ʻana i nā huahana, e like me ka hana ʻana i nā huahana leʻaleʻa wai, ʻoi aku ka maikaʻi o ka polyether TPU.

Eia nō naʻe, i ke koho ʻana, a i ʻole ka hui ʻana i ʻelua mau ʻano TPU, ʻaʻohe o lākou ʻokoʻa nui i ka helehelena. No laila pehea mākou e hoʻokaʻawale ai iā lākou?

Nui maoli nā ʻano, e like me ka colorimetry kemika, gas chromatography-mass spectrometry (GCMS), mid infrared spectroscopy, etc. Eia naʻe, pono kēia mau ʻano i nā koi ʻenehana kiʻekiʻe a lōʻihi ka manawa.

Aia kekahi ala ʻike maʻalahi a wikiwiki hoʻi? ʻAe ka pane, no ka laʻana, ke ʻano hoʻohālikelike density.

Pono kēia ʻano hana i hoʻokahi mea hōʻike density. ʻO ka lawe ʻana i ka mīkini paʻa paʻa kiʻekiʻe ma ke ʻano he laʻana, ʻo nā ʻanuʻu ana:

E kau i ka huahana i loko o ka pākaukau ana, e hōʻike i ke kaumaha o ka huahana, a kaomi i ke kī Enter e hoʻomanaʻo.
E kau i ka huahana i loko o ka wai e hōʻike i ka waiwai nui.
ʻO ke kaʻina hana holoʻokoʻa e pili ana i 5 kekona, a laila hiki ke hoʻokaʻawale ʻia ma muli o ke kumumanaʻo ʻoi aku ka kiʻekiʻe o ka TPU ʻano polyester ma mua o ka TPU polyether type. ʻO ka laulā kikoʻī kikoʻī: polyether type TPU -1.13-1.18 g/cm3; Polyester TPU -1.18-1.22 g/cm3. Hiki i kēia ala ke hoʻokaʻawale koke ma waena o ke ʻano polyester TPU a me ke ʻano polyether.