H\u1ee3p kim l\u00e0 m\u1ed9t lo\u1ea1i v\u1eadt li\u1ec7u r\u1ea5t c\u00f3 \u00edch. H\u1ee3p kim c\u00f3 \u0111\u01b0\u1ee3c do nguy\u00ean t\u1eed c\u1ee7a m\u1ed9t kim lo\u1ea1i xen v\u00e0o c\u00e1c khe h\u1edf gi\u1eefa c\u00e1c nguy\u00ean t\u1eed c\u1ee7a kim lo\u1ea1i kh\u00e1c t\u1ea1o n\u00ean. H\u1ee3p kim c\u00f3 nh\u1eefng t\u00ednh n\u0103ng \u01b0u vi\u1ec7t so v\u1edbi kim lo\u1ea1i \u0111\u01a1n thu\u1ea7n. V\u00ec v\u1eady trong th\u1ef1c t\u1ebf, v\u1eadt li\u1ec7u kim lo\u1ea1i l\u00e0 h\u1ee3p kim \u0111\u01b0\u1ee3c d\u00f9ng ph\u1ed5 bi\u1ebfn h\u01a1n kim lo\u1ea1i \u0111\u01a1n thu\u1ea7n. Th\u1ebf nh\u01b0ng ch\u1ea5t d\u1ebbo h\u1ee3p kim l\u00e0 g\u00ec v\u00e0 \u0111\u01b0\u1ee3c h\u00ecnh th\u00e0nh nh\u01b0 th\u1ebf n\u00e0o?<\/p>\n\n\n\n
G\u1ecdi l\u00e0 ch\u1ea5t d\u1ebbo h\u1ee3p kim kh\u00f4ng c\u00f3 ngh\u0129a l\u00e0 lo\u1ea1i ch\u1ea5t li\u1ec7u do ch\u1ea5t d\u1ebbo v\u00e0 kim lo\u1ea1i k\u1ebft h\u1ee3p v\u1edbi nhau t\u1ea1o ra, m\u00e0 l\u00e0 n\u00f3i \u0111\u1ebfn h\u1ed7n h\u1ee3p c\u1ee7a hai lo\u1ea1i ch\u1ea5t d\u1ebbo tr\u1edf l\u00ean, t\u1ea1o th\u00e0nh m\u1ed9t v\u1eadt li\u1ec7u c\u00f3 t\u00ednh n\u0103ng m\u1edbi. V\u00ed d\u1ee5, v\u00e0o nh\u1eefng n\u0103m 60 c\u1ee7a th\u1ebf k\u1ef7 XX c\u00f3 m\u1ed9t lo\u1ea1i ch\u1ea5t d\u1ebbo k\u00fd hi\u1ec7u l\u00e0 PPO. \u0110\u00e2y l\u00e0 lo\u1ea1i ch\u1ea5t d\u1ebbo c\u00f3 c\u01b0\u1eddng \u0111\u1ed9 kh\u00e1 t\u1ed1t nh\u01b0ng ph\u1ea3i gia nhi\u1ec7t \u0111\u1ebfn nhi\u1ec7t \u0111\u1ed9 210\u00b0C m\u1edbi gia c\u00f4ng \u0111\u1ecbnh h\u00ecnh \u0111\u01b0\u1ee3c. Nh\u1ef1a polyphenol focmandehyt ch\u1ec9 c\u00f3 th\u1ec3 gia c\u00f4ng \u1edf nhi\u1ec7t 100\u00b0C; nh\u01b0ng s\u1ea3n ph\u1ea9m v\u1eabn c\u00f3 nhi\u1ec1u khuy\u1ebft t\u1eadt. Do v\u1eady c\u00e1c k\u1ef9 thu\u1eadt vi\u00ean \u0111\u00e3 ph\u1ed1i h\u1ee3p hai lo\u1ea1i ch\u1ea5t d\u1ebbo v\u1edbi nhau t\u1ea1o th\u00e0nh “h\u1ee3p kim” kh\u00f4ng ch\u1ec9 t\u0103ng cao \u0111\u01b0\u1ee3c kh\u1ea3 n\u0103ng ch\u1ecbu va \u0111\u1eadp, kh\u00f4ng b\u1ecb v\u1ee1 to\u00e1c m\u00e0 l\u1ea1i c\u00f3 th\u1ec3 gia c\u00f4ng \u0111\u1ecbnh h\u00ecnh \u1edf nhi\u1ec7t \u0111\u1ed9 140\u00b0C.<\/p>\n\n\n\n
Trong nh\u1eefng n\u0103m g\u1ea7n \u0111\u00e2y, trong h\u1ecd ch\u1ea5t d\u1ebbo c\u00f4ng tr\u00ecnh \u0111\u00e3 xu\u1ea5t hi\u1ec7n m\u1ed9t s\u1ed1 s\u1ea3n ph\u1ea9m ch\u1ea5t d\u1ebbo t\u00ednh n\u0103ng cao \u0111\u01b0\u1ee3c nhi\u1ec1u ng\u01b0\u1eddi coi tr\u1ecdng. V\u00ed d\u1ee5 ch\u1ea5t d\u1ebbo ABS l\u00e0 s\u1ea3n ph\u1ea9m do styren, polypropylnitril v\u00e0 butylen k\u1ebft h\u1ee3p v\u1edbi nhau theo t\u1ec9 l\u1ec7 nh\u1ea5t \u0111\u1ecbnh c\u1ed9ng tr\u00f9ng h\u1ee3p m\u00e0 th\u00e0nh (s\u1ea3n ph\u1ea9m c\u00f3 t\u00ean nh\u1ef1a acrilonitril – buta\u0111ien – styrene, k\u00fd hi\u1ec7u ABS l\u00e0 3 ch\u1eef c\u00e1i \u0111\u1ea7u c\u1ee7a t\u00ean g\u1ecdi n\u00e0y – N.D) S\u1ea3n ph\u1ea9m c\u00f3 \u0111\u1ea7y \u0111\u1ee7 t\u00ednh n\u0103ng c\u1ee7a ba h\u1ee3p ph\u1ea7n; t\u1ee9c c\u00f3 t\u00ednh ch\u1ea5t b\u00f3ng, d\u1ec5 gia c\u00f4ng \u0111\u1ecbnh h\u00ecnh c\u1ee7a styren; \u0111\u1ed9 c\u1ee9ng cao, t\u00ednh b\u1ec1n ho\u00e1 h\u1ecdc, ch\u1ecbu \u0111\u01b0\u1ee3c d\u1ea7u, gia c\u00f4ng c\u01a1 kh\u00ed t\u1ed1t c\u1ee7a polyacrilonitril; t\u00ednh d\u1ebbo dai, ch\u1ecbu va \u0111\u1eadp c\u1ee7a buta\u0111ien. V\u00ec v\u1eady nh\u1ef1a ABS \u0111\u01b0\u1ee3c s\u1eed d\u1ee5ng r\u1ed9ng r\u00e3i trong vi\u1ec7c ch\u1ebf t\u1ea1o d\u1ee5ng c\u1ee5 \u0111i\u1ec7n d\u00e2n d\u1ee5ng, trong c\u00e1c d\u1ee5ng c\u1ee5 quang h\u1ecdc, c\u0169ng nh\u01b0 c\u00e1c d\u1ee5ng c\u1ee5 gia \u0111\u00ecnh, trong x\u00e2y d\u1ef1ng nh\u00e0 c\u1eeda.<\/p>\n\n\n\n
Trong nh\u1eefng n\u0103m g\u1ea7n \u0111\u00e2y nhi\u1ec1u s\u1ea3n ph\u1ea9m ch\u1ebf t\u1ea1o b\u1eb1ng ch\u1ea5t d\u1ebbo h\u1ee3p kim xu\u1ea5t hi\u1ec7n, ch\u1ee9ng t\u1ecf tri\u1ec3n v\u1ecdng to l\u1edbn c\u1ee7a lo\u1ea1i v\u1eadt li\u1ec7u n\u00e0y.<\/p>\n\n\n\n
T\u1eeb kho\u00e1: Ch\u1ea5t d\u1ebbo h\u1ee3p kim.<\/p>\n\n\n\n
<\/p>\n\n\n\n\n\n\n","protected":false},"excerpt":{"rendered":"
H\u1ee3p kim l\u00e0 m\u1ed9t lo\u1ea1i v\u1eadt li\u1ec7u r\u1ea5t c\u00f3 \u00edch. H\u1ee3p kim c\u00f3 \u0111\u01b0\u1ee3c do nguy\u00ean t\u1eed c\u1ee7a m\u1ed9t kim lo\u1ea1i xen v\u00e0o c\u00e1c khe h\u1edf gi\u1eefa c\u00e1c nguy\u00ean t\u1eed c\u1ee7a kim lo\u1ea1i kh\u00e1c t\u1ea1o n\u00ean. H\u1ee3p kim c\u00f3 nh\u1eefng t\u00ednh n\u0103ng \u01b0u vi\u1ec7t so v\u1edbi kim lo\u1ea1i \u0111\u01a1n thu\u1ea7n. V\u00ec v\u1eady trong th\u1ef1c t\u1ebf, […]<\/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":[8,15],"tags":[],"class_list":["post-7860","post","type-post","status-publish","format-standard","hentry","category-hoa-hoc","category-hoi-dap-khoa-hoc"],"_links":{"self":[{"href":"https:\/\/www.vietlearn.org\/kien-thuc\/wp-json\/wp\/v2\/posts\/7860","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=7860"}],"version-history":[{"count":0,"href":"https:\/\/www.vietlearn.org\/kien-thuc\/wp-json\/wp\/v2\/posts\/7860\/revisions"}],"wp:attachment":[{"href":"https:\/\/www.vietlearn.org\/kien-thuc\/wp-json\/wp\/v2\/media?parent=7860"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/www.vietlearn.org\/kien-thuc\/wp-json\/wp\/v2\/categories?post=7860"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/www.vietlearn.org\/kien-thuc\/wp-json\/wp\/v2\/tags?post=7860"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}