{"id":688236,"date":"2024-11-01T15:34:29","date_gmt":"2024-11-01T14:34:29","guid":{"rendered":"https:\/\/www.thermal-engineering.org\/?p=688236"},"modified":"2024-11-01T15:34:29","modified_gmt":"2024-11-01T14:34:29","slug":"su-phan-huy-nhiet-trong-tai-che-polymer","status":"publish","type":"post","link":"https:\/\/www.thermal-engineering.org\/vi\/su-phan-huy-nhiet-trong-tai-che-polymer\/","title":{"rendered":"S\u1ef1 ph\u00e2n h\u1ee7y nhi\u1ec7t trong t\u00e1i ch\u1ebf polymer"},"content":{"rendered":"

S\u1ef1 ph\u00e2n h\u1ee7y nhi\u1ec7t trong t\u00e1i ch\u1ebf polymer: T\u00ecm hi\u1ec3u qu\u00e1 tr\u00ecnh nhi\u1ec7t ph\u00e2n gi\u00fap t\u00e1i ch\u1ebf polymer hi\u1ec7u qu\u1ea3 h\u01a1n, gi\u1ea3m thi\u1ec3u t\u00e1c \u0111\u1ed9ng m\u00f4i tr\u01b0\u1eddng v\u00e0 ti\u1ebft ki\u1ec7m t\u00e0i nguy\u00ean.<\/p>\n

\"S\u1ef1<\/p>\n

S\u1ef1 Ph\u00e2n H\u1ee7y Nhi\u1ec7t Trong T\u00e1i Ch\u1ebf Polymer<\/h2>\n

Trong ng\u00e0nh t\u00e1i ch\u1ebf polymer, s\u1ef1 ph\u00e2n h\u1ee7y nhi\u1ec7t \u0111\u00f3ng m\u1ed9t vai tr\u00f2 quan tr\u1ecdng. S\u1ef1 ph\u00e2n h\u1ee7y nhi\u1ec7t l\u00e0 qu\u00e1 tr\u00ecnh m\u00e0 polymer b\u1ecb ph\u00e1 v\u1ee1 do t\u00e1c \u0111\u1ed9ng c\u1ee7a nhi\u1ec7t \u0111\u1ed9 cao, d\u1eabn \u0111\u1ebfn vi\u1ec7c thay \u0111\u1ed5i t\u00ednh ch\u1ea5t h\u00f3a h\u1ecdc v\u00e0 c\u1ea5u tr\u00fac c\u1ee7a polymer.<\/p>\n

Qu\u00e1 Tr\u00ecnh Ph\u00e2n H\u1ee7y Nhi\u1ec7t<\/h2>\n

Qu\u00e1 tr\u00ecnh ph\u00e2n h\u1ee7y nhi\u1ec7t c\u00f3 th\u1ec3 di\u1ec5n ra qua ba giai \u0111o\u1ea1n ch\u00ednh:<\/p>\n

<\/p>\n

  • 1. Giai \u0111o\u1ea1n \u0111\u1ea7u:<\/strong> Khi polymer b\u1eaft \u0111\u1ea7u ti\u1ebfp x\u00fac v\u1edbi nhi\u1ec7t \u0111\u1ed9 cao, c\u00e1c li\u00ean k\u1ebft y\u1ebfu nh\u1ea5t trong c\u1ea5u tr\u00fac ph\u00e2n t\u1eed s\u1ebd b\u1ecb ph\u00e1 v\u1ee1 tr\u01b0\u1edbc ti\u00ean.<\/li>\n
  • 2. Giai \u0111o\u1ea1n gi\u1eefa:<\/strong> Qu\u00e1 tr\u00ecnh n\u00e0y ti\u1ebfp t\u1ee5c v\u1edbi vi\u1ec7c ph\u00e1 v\u1ee1 c\u00e1c li\u00ean k\u1ebft m\u1ea1nh h\u01a1n, t\u1ea1o ra c\u00e1c g\u1ed1c t\u1ef1 do v\u00e0 s\u1ea3n ph\u1ea9m ph\u1ee5 nh\u01b0 c\u00e1c kh\u00ed kh\u00e1c nhau, ch\u1ea5t l\u1ecfng hay ch\u1ea5t r\u1eafn.<\/li>\n
  • 3. Giai \u0111o\u1ea1n cu\u1ed1i:<\/strong> C\u00e1c s\u1ea3n ph\u1ea9m ph\u1ee5 ti\u1ebfp t\u1ee5c ph\u00e2n h\u1ee7y ho\u1eb7c k\u1ebft h\u1ee3p v\u1edbi nhau \u0111\u1ec3 t\u1ea1o ra c\u00e1c ch\u1ea5t m\u1edbi, ho\u00e0n to\u00e0n kh\u00e1c so v\u1edbi polymer ban \u0111\u1ea7u.<\/li>\n

    <\/u1><\/p>\n

    Ph\u01b0\u01a1ng Tr\u00ecnh H\u00f3a H\u1ecdc<\/h2>\n

    Ph\u1ea3n \u1ee9ng ph\u00e2n h\u1ee7y nhi\u1ec7t c\u1ee7a m\u1ed9t polymer c\u00f3 th\u1ec3 \u0111\u01b0\u1ee3c bi\u1ec3u di\u1ec5n b\u1eb1ng ph\u01b0\u01a1ng tr\u00ecnh \u0111\u01a1n gi\u1ea3n sau:<\/p>\n

    Cx<\/sub>Hy<\/sub> \u2192 Cx-i<\/sub>Hy-i<\/sub> + C*<\/sup>i<\/sub>Hi<\/sub><\/p>\n

    Trong \u0111\u00f3, Cx<\/sub>Hy<\/sub> l\u00e0 c\u00f4ng th\u1ee9c c\u1ea5u tr\u00fac c\u1ee7a polymer ban \u0111\u1ea7u, i l\u00e0 s\u1ed1 l\u01b0\u1ee3ng \u0111\u01a1n v\u1ecb ph\u00e2n t\u1eed b\u1ecb m\u1ea5t ho\u1eb7c thay \u0111\u1ed5i trong qu\u00e1 tr\u00ecnh ph\u00e2n h\u1ee7y, v\u00e0 C*<\/sup>i<\/sub>Hi<\/sub> l\u00e0 c\u00e1c s\u1ea3n ph\u1ea9m ph\u1ee5.<\/p>\n

    \u1ee8ng D\u1ee5ng Trong T\u00e1i Ch\u1ebf Polyethylene<\/h2>\n

    V\u00ed d\u1ee5, t\u00e1i ch\u1ebf polyethylene (PE) – m\u1ed9t lo\u1ea1i nh\u1ef1a ph\u1ed5 bi\u1ebfn – th\u01b0\u1eddng b\u1eaft \u0111\u1ea7u v\u1edbi s\u1ef1 ph\u00e2n h\u1ee7y nhi\u1ec7t. Qu\u00e1 tr\u00ecnh n\u00e0y c\u00f3 th\u1ec3 \u0111\u01b0\u1ee3c qu\u1ea3n l\u00fd \u0111\u1ec3 t\u1ea1o ra c\u00e1c s\u1ea3n ph\u1ea9m kh\u00e1c nhau nh\u01b0:<\/p>\n

    <\/p>\n

  • D\u1ea7u:<\/strong> \u0110\u01b0\u1ee3c d\u00f9ng l\u00e0m nhi\u00ean li\u1ec7u ho\u1eb7c nguy\u00ean li\u1ec7u h\u00f3a h\u1ecdc.<\/li>\n
  • Kh\u00ed:<\/strong> C\u00f3 th\u1ec3 \u0111\u01b0\u1ee3c s\u1eed d\u1ee5ng nh\u01b0 kh\u00ed \u0111\u1ed1t ho\u1eb7c n\u1ea1p v\u00e0o c\u00e1c quy tr\u00ecnh c\u00f4ng nghi\u1ec7p kh\u00e1c.<\/li>\n
  • C\u1eb7n r\u1eafn:<\/strong> C\u00f3 th\u1ec3 s\u1eed d\u1ee5ng trong ng\u00e0nh c\u00f4ng nghi\u1ec7p x\u00e2y d\u1ef1ng ho\u1eb7c l\u00e0m nguy\u00ean li\u1ec7u t\u00e1i ch\u1ebf ti\u1ebfp theo.<\/li>\n

    <\/u1><\/p>\n

    \u01afu v\u00e0 Nh\u01b0\u1ee3c \u0110i\u1ec3m<\/h2>\n

    Nh\u01b0 b\u1ea5t k\u1ef3 qu\u00e1 tr\u00ecnh c\u00f4ng ngh\u1ec7 n\u00e0o, s\u1ef1 ph\u00e2n h\u1ee7y nhi\u1ec7t trong t\u00e1i ch\u1ebf polymer c\u0169ng c\u00f3 nh\u1eefng \u01b0u v\u00e0 nh\u01b0\u1ee3c \u0111i\u1ec3m:<\/p>\n

    <\/p>\n

  • \u01afu \u0111i\u1ec3m:<\/strong><\/li>\n

    <\/p>\n

  • Gi\u1ea3m l\u01b0\u1ee3ng r\u00e1c th\u1ea3i nh\u1ef1a.<\/li>\n
  • T\u1ea1o ra c\u00e1c s\u1ea3n ph\u1ea9m ph\u1ee5 c\u00f3 gi\u00e1 tr\u1ecb.<\/li>\n
  • Gi\u00fap ti\u1ebft ki\u1ec7m nguy\u00ean li\u1ec7u v\u00e0 n\u0103ng l\u01b0\u1ee3ng t\u1ef1 nhi\u00ean.<\/li>\n

    <\/o1><\/p>\n

  • Nh\u01b0\u1ee3c \u0111i\u1ec3m:<\/strong><\/li>\n

    <\/p>\n

  • Y\u00eau c\u1ea7u qu\u1ea3n l\u00fd nhi\u1ec7t \u0111\u1ed9 cao \u0111\u1ec3 tr\u00e1nh vi\u1ec7c ph\u00e2n h\u1ee7y kh\u00f4ng ki\u1ec3m so\u00e1t.<\/li>\n
  • C\u1ea7n thi\u1ebft b\u1ecb v\u00e0 c\u00f4ng ngh\u1ec7 ph\u1ee9c t\u1ea1p, t\u1ed1n k\u00e9m.<\/li>\n
  • C\u00e1c s\u1ea3n ph\u1ea9m ph\u1ee5 c\u00f3 th\u1ec3 c\u1ea7n x\u1eed l\u00fd th\u00eam \u0111\u1ec3 \u0111\u1ea3m b\u1ea3o an to\u00e0n m\u00f4i tr\u01b0\u1eddng.<\/li>\n

    <\/o1>
    \n<\/u1><\/p>\n

    K\u1ebft Lu\u1eadn<\/h2>\n

    S\u1ef1 ph\u00e2n h\u1ee7y nhi\u1ec7t \u0111\u00f3ng m\u1ed9t vai tr\u00f2 thi\u1ebft y\u1ebfu trong t\u00e1i ch\u1ebf polymer, gi\u00fap chuy\u1ec3n \u0111\u1ed5i c\u00e1c lo\u1ea1i nh\u1ef1a c\u0169 th\u00e0nh c\u00e1c s\u1ea3n ph\u1ea9m c\u00f3 gi\u00e1 tr\u1ecb ho\u1eb7c nguy\u00ean li\u1ec7u m\u1edbi cho c\u00e1c quy tr\u00ecnh s\u1ea3n xu\u1ea5t kh\u00e1c. M\u1eb7c d\u00f9 c\u00f3 nh\u1eefng th\u00e1ch th\u1ee9c k\u1ef9 thu\u1eadt, nh\u01b0ng l\u1ee3i \u00edch m\u00e0 n\u00f3 mang l\u1ea1i cho m\u00f4i tr\u01b0\u1eddng v\u00e0 n\u1ec1n kinh t\u1ebf l\u00e0 v\u00f4 c\u00f9ng l\u1edbn.<\/p>\n","protected":false},"excerpt":{"rendered":"

    S\u1ef1 ph\u00e2n h\u1ee7y nhi\u1ec7t trong t\u00e1i ch\u1ebf polymer: T\u00ecm hi\u1ec3u qu\u00e1 tr\u00ecnh nhi\u1ec7t ph\u00e2n gi\u00fap t\u00e1i ch\u1ebf polymer hi\u1ec7u qu\u1ea3 h\u01a1n, gi\u1ea3m thi\u1ec3u t\u00e1c \u0111\u1ed9ng m\u00f4i tr\u01b0\u1eddng v\u00e0 ti\u1ebft ki\u1ec7m t\u00e0i nguy\u00ean.<\/p>\n","protected":false},"author":1,"featured_media":0,"comment_status":"closed","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":[],"categories":[132],"tags":[],"yoast_head":"\nS\u1ef1 ph\u00e2n h\u1ee7y nhi\u1ec7t trong t\u00e1i ch\u1ebf polymer<\/title>\n<meta name=\"description\" content=\"S\u1ef1 ph\u00e2n h\u1ee7y nhi\u1ec7t trong t\u00e1i ch\u1ebf polymer: T\u00ecm hi\u1ec3u qu\u00e1 tr\u00ecnh nhi\u1ec7t ph\u00e2n gi\u00fap t\u00e1i ch\u1ebf polymer hi\u1ec7u qu\u1ea3 h\u01a1n, gi\u1ea3m thi\u1ec3u t\u00e1c \u0111\u1ed9ng m\u00f4i tr\u01b0\u1eddng v\u00e0 ti\u1ebft ki\u1ec7m t\u00e0i nguy\u00ean.\" \/>\n<meta name=\"robots\" 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