T\u1eeb kh\u00f3a t\u00ecm ki\u1ebfm: H\u00e3y Tr\u1ea3 L\u1eddi Em T\u1ea1i Sao? \u2013 T\u1eadp 5 – Arkady Leokum<\/p>\n\n\n\n
Ngh\u0129a nguy\u00ean th\u1ee7y c\u1ee7a plastic l\u00e0 co gi\u00e3n, d\u1ec5 \u00e9p khu\u00f4n. Khi \u0111\u01b0\u1ee3c h\u01a1 n\u00f3ng l\u00ean, plastic d\u1ebbo ra g\u1ea7n nh\u01b0 \u0111\u1ea5t s\u00e9t d\u1ebbo. Khi n\u00f3ng, n\u00f3 d\u1ec5 b\u1ecb \u00e9p khu\u00f4n v\u00e0 khi ngu\u1ed9i, n\u00f3 gi\u1eef nguy\u00ean h\u00ecnh theo khu\u00f4n.<\/p>\n\n\n\n
C\u00f3 l\u1ebd ch\u1eb3ng th\u1ec3 n\u00f3i c\u00f4ng d\u1ee5ng c\u1ee7a plastic b\u1eb1ng c\u00e1ch li\u1ec7t k\u00ea nh\u1eefng d\u1ee5ng c\u1ee5 \u0111\u00e3 \u0111\u01b0\u1ee3c ch\u1ebf t\u1ea1o b\u1eb1ng plastic. C\u00f3 th\u1ec3 n\u00f3i kh\u00f4ng c\u00f3 ng\u00e0y n\u00e0o m\u00e0 ta l\u1ea1i kh\u00f4ng s\u1edd, kh\u00f4ng \u0111\u1ee5ng v\u00e0o m\u1ed9t \u0111\u1ed3 v\u1eadt l\u00e0m b\u1eb1ng plastic. Th\u1ebf nh\u01b0ng plastic l\u00e0 g\u00ec? \u0111i\u1ec1u n\u00ean bi\u1ebft l\u00e0 tr\u01b0\u1edbc khi tr\u1edf th\u00e0nh d\u1ee5ng c\u1ee5 mang h\u00ecnh n\u00e0y d\u1ea1ng kia – c\u00e0i x\u00f4, c\u00e1i gh\u1ebf\u2026 ch\u1eb3ng h\u1ea1n – th\u00ec plastic l\u00e0 nh\u1eefng h\u1ea1t. Ph\u00e2n t\u00edch m\u00e3i – plastic l\u00ec l\u1eafm – n\u00f3 v\u1eabn gi\u1eef d\u1ea1ng h\u1ea1t.<\/p>\n\n\n\n
T\u1eeb m\u1ed9t v\u00e0i ch\u1ea5t li\u1ec7u c\u01a1 b\u1ea3n, c\u00e1c nh\u00e0 h\u00f3a h\u1ecdc \u0111\u00e3 ch\u1ebf t\u1ea1o ra m\u1ed9t ch\u1ea5t li\u1ec7u m\u1edbi c\u00f3 d\u1ea1ng chu\u1ed7i h\u1ea1t. T\u00e1c \u0111\u1ed9ng c\u1ee7a ch\u1ea5t li\u1ec7u m\u1edbi t\u1ee9c l\u00e0 chu\u1ed7i h\u1ea1t, kh\u00e1c h\u1eb3n v\u1edbi \u0111\u01a1n h\u1ea1t (h\u1ea1t nguy\u00ean th\u1ee7y) v\u00ec khi k\u1ebft th\u00e0nh chu\u1ed7i h\u1ea1t n\u00f3 c\u00f3 nh\u1eefng t\u00ednh n\u0103ng m\u1edbi. Khi \u201c\u0111\u01a1n h\u1ea1t\u201d k\u1ebft th\u00e0nh chu\u1ed7i h\u1ea1t ta g\u1ecdi l\u00e0 \u201c\u0111a tr\u00f9ng h\u00f3a\u201d.<\/p>\n\n\n\n
C\u00f3 khi hai lo\u1ea1i \u0111\u01a1n h\u1ea1t kh\u00e1c nhau k\u1ebft h\u1ee3p v\u1edbi nhau t\u1ea1o n\u00ean m\u1ed9t ch\u1ea5t li\u1ec7u m\u1edbi g\u1ecdi l\u00e0 \u201cc\u1eb7p \u0111\u00f4i\u201d (copolymer). Chu\u1ed7i \u201ch\u1ea1t c\u1eb7p \u0111\u00f4i\u201d t\u00e1c \u0111\u1ed9ng kh\u00e1c h\u1eb3n m\u1ed7i chu\u1ed7i h\u1ea1t \u0111\u01a1n c\u1ea5u t\u1ea1o ra n\u00f3. C\u1ee9 nh\u01b0 v\u1eady ta th\u1ea5y c\u00e1c nh\u00e0 h\u00f3a h\u1ecdc c\u00f3 kh\u1ea3 n\u0103ng g\u1ea7n nh\u01b0 v\u00f4 h\u1ea1n \u0111\u1ec3 t\u1ea1o ra c\u00e1c ch\u1ea5t li\u1ec7u m\u1edbi b\u1eb1ng c\u00e1ch cho chu\u1ed7i h\u1ea1t \u0111\u01a1n n\u00e0y k\u1ebft v\u1edbi chu\u1ed7i h\u1ea1t \u0111\u01a1n kia.<\/p>\n\n\n\n
Ch\u1ea5t \u201cpolymer\u201d (t\u1ee9c l\u00e0 chu\u1ed7i-h\u1ea1t-d\u00e0i) l\u00e0 th\u1ee7y t\u1ed5 c\u1ee7a ch\u1ea5t \u201cplastic\u201d. Ch\u1ea5t \u201cpolymer\u201d c\u00f3 th\u1ec3 \u0111\u01b0\u1ee3c thay \u0111\u1ed5i cho ph\u00f9 h\u1ee3p v\u1edbi vi\u1ec7c \u0111\u00fac khu\u00f4n. N\u00f3 c\u00f3 th\u1ec3 \u0111\u01b0\u1ee3c xay th\u00e0nh \u201cb\u1ed9t\u201d hay vo vi\u00ean. Th\u00eam m\u00e0u v\u00e0o n\u1eefa, c\u00e1c nh\u00e0 h\u00f3a h\u1ecdc c\u00f3 th\u1ec3 l\u00e0m cho \u201cpolymer\u201d h\u00f3a d\u1ebbo. Th\u00eam v\u00e0o \u0111\u00f3 m\u1ed9t h\u00f3a ch\u1ea5t \u0111\u01b0\u1ee3c g\u1ecdi l\u00e0 \u201cplastic – h\u00f3a\u201d (plasticizer), ng\u01b0\u1eddi ta c\u00f3 th\u1ec3 k\u00e9o s\u1ee3i ho\u1eb7c \u00e9p m\u1ecfng h\u01a1n t\u1edd gi\u1ea5y \u0111\u1ec3 l\u00e0m \u00e1o m\u01b0a, l\u00e0m bao\u2026<\/p>\n\n\n\n
Plastic c\u00f3 nhi\u1ec1u ch\u1ee9c n\u0103ng, do \u0111\u00f3, c\u00f3 nhi\u1ec1u c\u00f4ng d\u1ee5ng r\u1ea5t \u0111\u1eb7c bi\u1ec7t. N\u00f3 c\u00f3 kh\u1ea3 n\u0103ng c\u00e1ch \u0111i\u1ec7n, c\u00e1ch nhi\u1ec7t nh\u1eb9, kh\u00f4ng d\u1ec5 b\u1ec3\u2026 M\u1ed7i lo\u1ea1i plastic l\u1ea1i do m\u1ed9t lo\u1ea1i ch\u1ea5t li\u1ec7u kh\u00e1c nhau. Lo\u1ea1i th\u00ec do than, lo\u1ea1i th\u00ec do mu\u1ed1i, lo\u1ea1i th\u00ec do g\u1ed7, lo\u1ea1i do b\u00f4ng g\u00f2n\u2026 Nh\u01b0ng trong m\u1ed7i tr\u01b0\u1eddng h\u1ee3p c\u00e1c h\u1ea1t \u0111\u1ec1u \u0111\u01b0\u1ee3c s\u1eafp l\u1ea1i theo \u0111\u00fang c\u00e1ch v\u00e0 c\u00e1c h\u00f3a ch\u1ea5t \u0111\u01b0\u1ee3c \u0111\u01b0a v\u00e0o \u0111\u1ec3 t\u1ea1o ra lo\u1ea1i plastic nh\u01b0 mong mu\u1ed1n.<\/p>\n","protected":false},"excerpt":{"rendered":"
T\u1eeb kh\u00f3a t\u00ecm ki\u1ebfm: H\u00e3y Tr\u1ea3 L\u1eddi Em T\u1ea1i Sao? \u2013 T\u1eadp 5 – Arkady Leokum Ngh\u0129a nguy\u00ean th\u1ee7y c\u1ee7a plastic l\u00e0 co gi\u00e3n, d\u1ec5 \u00e9p khu\u00f4n. Khi \u0111\u01b0\u1ee3c h\u01a1 n\u00f3ng l\u00ean, plastic d\u1ebbo ra g\u1ea7n nh\u01b0 \u0111\u1ea5t s\u00e9t d\u1ebbo. Khi n\u00f3ng, n\u00f3 d\u1ec5 b\u1ecb \u00e9p khu\u00f4n v\u00e0 khi ngu\u1ed9i, n\u00f3 gi\u1eef nguy\u00ean h\u00ecnh theo […]<\/p>\n","protected":false},"author":1,"featured_media":0,"comment_status":"closed","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":"","_disable_autopaging":false},"categories":[15],"tags":[],"class_list":["post-14614","post","type-post","status-publish","format-standard","hentry","category-hoi-dap-khoa-hoc"],"_links":{"self":[{"href":"https:\/\/www.vietlearn.org\/kien-thuc\/wp-json\/wp\/v2\/posts\/14614","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/www.vietlearn.org\/kien-thuc\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/www.vietlearn.org\/kien-thuc\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/www.vietlearn.org\/kien-thuc\/wp-json\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/www.vietlearn.org\/kien-thuc\/wp-json\/wp\/v2\/comments?post=14614"}],"version-history":[{"count":1,"href":"https:\/\/www.vietlearn.org\/kien-thuc\/wp-json\/wp\/v2\/posts\/14614\/revisions"}],"predecessor-version":[{"id":14615,"href":"https:\/\/www.vietlearn.org\/kien-thuc\/wp-json\/wp\/v2\/posts\/14614\/revisions\/14615"}],"wp:attachment":[{"href":"https:\/\/www.vietlearn.org\/kien-thuc\/wp-json\/wp\/v2\/media?parent=14614"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/www.vietlearn.org\/kien-thuc\/wp-json\/wp\/v2\/categories?post=14614"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/www.vietlearn.org\/kien-thuc\/wp-json\/wp\/v2\/tags?post=14614"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}