{"id":275,"date":"2009-01-14T13:19:02","date_gmt":"2009-01-14T05:19:02","guid":{"rendered":"http:\/\/www.g4e.cn\/wordpress\/?p=275"},"modified":"2013-11-14T16:14:35","modified_gmt":"2013-11-14T08:14:35","slug":"elastomer-based-adhesive-and-physical-properties-and-chemical-properties","status":"publish","type":"post","link":"http:\/\/www.g4e.cn\/wordpress\/learnrecord\/275.html","title":{"rendered":"\u7b2c\u4e5d\u7ae0 \u5f39\u6027\u4f53\u57fa\u80f6\u7c98\u5242\u7684\u5316\u5b66\u6027\u8d28\u53ca\u7269\u7406\u6027\u80fd"},"content":{"rendered":"<p>1\u3001\u538b\u654f\u80f6\u7c98\u5242\uff08PSA-Pressure Sensitive Adhesive\uff09\u7684\u5b9a\u4e49\uff1a<br \/>\na. \u7c98\u6027\u5f3a\u529b\u4e14\u6301\u4e45\uff1bb.\u4ec5\u7528\u6307\u538b\u5373\u53ef\u7c98\u9644\uff1bc.\u4e0d\u9700\u8981\u4efb\u4f55\u80fd\u91cf\u6e90\u6765\u6fc0\u6d3b\uff1b<br \/>\nd. \u5177\u6709\u8db3\u591f\u7684\u80fd\u529b\u675f\u7f1a\u88ab\u7c98\u7269\uff1be.\u5177\u6709\u8db3\u591f\u7684\u5185\u805a\u5f3a\u5ea6\uff0c\u4f7f\u5176\u80fd\u591f\u4ece\u88ab\u7c98\u7269\u4e0a\u5e72\u51c0\u7684\u53bb\u9664\u3002<br \/>\n\u521d\u7c98\u6027-tack\u00a0 \u589e\u7c98\u5242-tackifier\u00a0 \u538b\u654f\u80f6\u5e26-PSATs<br \/>\n2\u3001PSAs\u57fa\u4f53\u6811\u8102\u7684\u5316\u5b66\u6027\u8d28\uff1a<br \/>\na.\u5929\u7136\u6a61\u80f6\u57faPSA:\u591a\u7528\u4e8ePSAT\u4e2d\uff08\u8986\u819c\u80f6\u5e26 masking tape\uff09\uff0c\u957f\u671f\u66b4\u9732\u73af\u5883\u4e2d\u4e0d\u7a33\u5b9a\uff1b<br \/>\nb.\u4e19\u70ef\u9178\u916f\u57faPSA:2-\u4e59\u57fa\u5df1\u57fa\u4e19\u70ef\u9178\u916f\u548c\u4e19\u70ef\u9178\u5f02\u8f9b\u916f+\u4e19\u70ef\u9178\uff0c\u4f18\u5f02\u7684\u7684\u8010\u8001\u5316\u6027\u80fd\uff1b<br \/>\nc.\u5d4c\u6bb5\u5171\u805a\u7269\u5f39\u6027\u4f53\uff1a\u901a\u8fc7\u76f8\u5206\u79bb\u6765\u6ee1\u8db3PSA\u7684\u8981\u6c42\uff0c\u7531\u5f02\u620a\u4e8c\u70ef\u6216\u4e01\u4e8c\u70ef\u4e0e\u82ef\u4e59\u70ef\u5f62\u6210A-B-A\u5d4c\u6bb5\u5171\u805a\u7269\u53ef\u4ee5\u4ea7\u751f\u76f8\u5206\u79bb\u7ed3\u6784<br \/>\nd.\u7845\u6c27\u70f7\u7c7bPSA\uff1a\u805a\u4e8c\u7532\u57fa\u7845\u6c27\u70f7+\u4e8c\u82ef\u57fa\u7845\u6c27\u70f7\u5355\u5143\u7ecf\u8fc7\u589e\u7c98\u548c\u4ea4\u8054\uff1b<br \/>\ne.\u805a\u5f02\u4e01\u70ef\u3001\u805a\u4e59\u70ef\u919a\u548c\u805a\u4e01\u4e8c\u70ef\u4e5f\u53ef\u7528\u4e8e\u5236\u5907PSAs\u3002<br \/>\n3\u3001\u589e\u7c98\u5242\u7684\u5316\u5b66\u6027\u8d28<br \/>\n\u589e\u7c98\u5242\u662f\u4e00\u7c7b\u72ec\u7279\u7684\u7269\u8d28\uff0c\u5b83\u4eec\u901a\u5e38\u662f\u4e00\u4e9b\u4f4e\u5206\u5b50\u91cf\u6811\u8102\uff0c\u4f46\u5176\u73bb\u7483\u5316\u8f6c\u53d8\u6e29\u5ea6\u548c\u8f6f\u5316\u6e29\u5ea6\u901a\u5e38\u8fdc\u8fdc\u9ad8\u4e8e\u5ba4\u6e29\u3002<br \/>\na.\u5929\u7136\u4ea7\u7269\u7c7b\u589e\u7c98\u5242\uff1a\u677e\u9999\u9178\u884d\u751f\u7269\u3001\u03b1-\u848e\u70ef\u548c\u03b2-\u848e\u70ef\uff08\u841c\u70ef\uff09\uff1b<br \/>\nb.\u77f3\u6cb9\u7c7b\u589e\u7c98\u5242\uff1a\u7531\u77f3\u6cb9\u88c2\u89e3\u4ea7\u7269\u5f97\u5230\uff0c\u5e7f\u4e49\u4e0a\u5206\u4e3a\u4e24\u7c7b-\u82b3\u9999\u65cf\u6811\u8102\uff08\u9999\u8c46\u916e-\u831a\u6811\u8102\u3001\u82b3\u9999\u7c7b\u77f3\u6cb9\u6811\u8102\u548c\u70ed\u6d3b\u5316\u6811\u8102\uff09\u548c\u8102\u80aa\u7c7b\u6811\u8102\uff08\u201cC-5\u201d\u6811\u8102\uff09\uff1b<br \/>\nc.\u5176\u5b83\u589e\u7c98\u5242\uff1a\u4e00\u7c7b\u662f\u4e13\u95e8\u7528\u4e8e\u7845\u6c27\u70f7PSAs\u7684MQ\u6811\u8102\uff0c\u4e00\u7c7b\u662f\u53d4\u4e01\u57fa\u915a\u919b\u6811\u8102\uff1b<!--more--><br \/>\n4\u3001\u538b\u654f\u80f6\u7c98\u5242\u7684\u6d4b\u8bd5\uff1a<br \/>\na.\u521d\u7c98\u6027\u6d4b\u8bd5<br \/>\n\u521d\u7c98\u6027\uff1aPSTC\uff08\u538b\u654f\u80f6\u5e26\u534f\u4f1a\uff09\u5b9a\u4e49\u4e3a\u201c\u80f6\u7c98\u5242\u5728\u611f\u89c9\u4e0a\u53d1\u7c98\u6216\u5177\u6709\u5f88\u9ad8\u7c98\u9644\u6027\u7684\u72b6\u51b5\uff0c\u6709\u65f6\u5b83\u4e5f\u7528\u6765\u8868\u793a\u538b\u654f\u6027\u7684\u542b\u4e49\u201d\uff0cASTM\u5b9a\u4e49\u4e3a\u201c\u80f6\u7c98\u5242\u548c\u88ab\u7c98\u7269\u5728\u5f88\u4f4e\u7684\u538b\u529b\u4e0b\u63a5\u89e6\u540e\uff0c\u80f6\u7c98\u5242\u80fd\u591f\u4f7f\u80f6\u63a5\u4ef6\u7acb\u5373\u4ea7\u751f\u4e00\u5b9a\u5f3a\u5ea6\u7684\u6027\u80fd\u201d<br \/>\n\u6d4b\u8bd5\u65b9\u6cd5\uff1a\u5feb\u7c98\u6d4b\u8bd5\uff08PSTC-5\uff09\u3001\u6eda\u73e0\u521d\u7c98\u6027\u6d4b\u8bd5\uff08PSTC-6\u00a0\u00a0 ASTMD3121\uff09\u3001\u73af\u5f62\u521d\u7c98\u6027\u6d4b\u8bd5\u6cd5(\u672a\u516c\u5e03)\u3001\u63a2\u5934\u521d\u7c98\u6027\u6d4b\u8bd5\u6cd5\uff08ASTMD2979\uff09\u3001\u7279\u5f81\u5206\u6790\u4eea\uff08texture analyzer\uff09\u3002<br \/>\nb.\u5265\u79bb\u6d4b\u8bd5\uff08\u8f67\u5236 roll down\uff09\uff1a90\u00b0\u548c180\u00b0\u5265\u79bb\u8bd5\u9a8c<br \/>\nc.\u526a\u5207\u6d4b\u5b9a\uff1a\u4e00\u822c\u6765\u8bf4PSA\u4e0d\u4ee5\u5176\u526a\u5207\u5f3a\u5ea6\u8fdb\u884c\u5224\u5b9a\uff0c\u800c\u662f\u4ee5\u5b83\u5728\u627f\u53d7\u4f4e\u8f7d\u8377\u60c5\u51b5\u4e0b\u7684\u4f7f\u7528\u65f6\u95f4\u6765\u8861\u91cf\u3002\u526a\u5207\u4fdd\u6301\u7387\uff08\u6301\u526a\u529b\uff09-\u6052\u8f7d\u8815\u53d8\u6d4b\u8bd5<br \/>\n5\u3001\u538b\u654f\u80f6\u5176\u4ed6\u76f8\u5173\u8981\u6c42\uff1a<br \/>\na.\u5404\u9879\u6027\u80fd\u7684\u5747\u8861\uff1a\u521d\u7c98\u6027\u3001\u5265\u79bb\u529b\u548c\u526a\u5207\u529b\u7684\u540c\u65f6\u6700\u5927\u5316;<br \/>\nb.\u7c98\u5f39\u6027\u54cd\u5e94\u65f6\u95f4\u8303\u56f4\u5185\u7684PSA\u6027\u80fd\uff1a\u5e0c\u671bPSA\u8868\u73b0\u4e3a\u6db2\u4f53\u7684\u65f6\u95f4\u8303\u56f4\u4e3a\u51e0\u79d2\u6216\u66f4\u957f\uff0c\u800c\u8868\u73b0\u4e3a\u56fa\u4f53\u7684\u65f6\u95f4\u8303\u56f4\u4e3a\u96f6\u70b9\u51e0\u79d2\u6216\u66f4\u77ed\uff0c\u5728\u7279\u5b9a\u6e29\u5ea6\u4e0b\u53ea\u6709\u7c98\u5f39\u6027\u6750\u6599\u624d\u80fd\u83b7\u5f97\u8fd9\u4e9b\u7279\u6027-\u5728\u4f7f\u7528\u6e29\u5ea6\u4e0b\u4ee5\u8f83\u957f\u7684\u65f6\u95f4\u8fdb\u884c\u6da6\u6e7f\uff0c\u800c\u4ee5\u5f88\u77ed\u7684\u65f6\u95f4\u6765\u62b5\u6297\u5265\u79bb\u7834\u574f\uff1b<br \/>\nc.PSA\u7684\u521d\u7c98\u6027\u4e0e\u7c98\u5f39\u6027\uff1aDahlquist\u521d\u7c98\u6027\u6807\u51c6<br \/>\nd.PSA\u7684\u5265\u79bb\u7279\u6027\u548c\u7c98\u5f39\u6027\uff1a\u6811\u8102\uff08\u589e\u7c98\u5242\uff09\u542b\u91cf\u7684\u53d8\u5316\u3001\u57fa\u6750\u7684\u4e34\u754c\u6da6\u6e7f\u5f20\u529b\u4ee5\u53ca\u5265\u79bb\u901f\u7387\u7b49\u5bf9\u5265\u79bb\u7279\u6027\u5747\u6709\u5f71\u54cd\uff1b<br \/>\ne.PSA\u7684\u526a\u5207\u7279\u6027\u4e0e\u8815\u53d8\u884c\u4e3a\uff1a\u6709\u4e24\u79cd\u65b9\u6cd5\u53ef\u4ee5\u7528\u6765\u63d0\u9ad8PSA\u7684\u526a\u5207\u6027\u80fd\uff0c\u4e00\u79cd\u662f\u901a\u8fc7\u4ea4\u8054\u63d0\u9ad8\u5206\u5b50\u91cf\uff0c\u7b2c\u4e8c\u79cd\u662f\u5728PSA\u57fa\u4f53\u805a\u5408\u7269\u7684\u5408\u6210\u8fc7\u7a0b\u4e2d\u8fd8\u53ef\u4ee5\u52a0\u5165\u7279\u6b8a\u7684\u4e19\u70ef\u9178\u916f\u5355\u4f53\u3002<br \/>\n6\u3001\u6a61\u80f6\u57fa\u3001\u89e6\u538b\u7c7b\u548c\u5176\u4ed6\u5f39\u6027\u4f53\u57fa\u80f6\u7c98\u5242<br \/>\n\u975ePSA\u5f39\u6027\u4f53\u80f6\u7c98\u5242\u53ef\u79f0\u4e3a\u6a61\u80f6\u57fa\u80f6\u7c98\u5242\u6216RBAs\uff0c\u5176\u627f\u8f7d\u65f6\u95f4\u5fc5\u987b\u660e\u663e\u957f\u4e8ePSAs\uff0c\u5176\u526a\u5207\u5f3a\u5ea6\u4e5f\u5fc5\u987b\u8fbe\u5230\u534a\u7ed3\u6784\u80f6\u7c98\u5242\u7684\u8981\u6c42\u3002\u5728\u5de5\u4e1a\u4e0a\u4e0a\u5e7f\u6cdb\u5e94\u7528\u4e8e\u5bb6\u5177\u5236\u9020\u3001\u7c98\u7ed3\u7ec7\u7269\u4e0e\u6ce1\u6cab\u82af\u6750\u3001\u5236\u978b\u5de5\u4e1a\u3001\u5efa\u7b51\u7ed3\u6784\u80f6\u548c\u80f6\u5408\u677f\u8d34\u9762\u7b49\u7b49<br \/>\n7\u3001RBAs\u7684\u914d\u65b9\u8bbe\u8ba1:\u5e7f\u4e49\u4e0a\u5206\u4e3a\u4e09\u7c7b\uff0c\u6eb6\u5242\u578b\u3001\u4e73\u6db2\u578b\u548c100%\u56fa\u4f53\u4f53\u7cfb\u3002\u4e5f\u53ef\u5206\u4e3a\u56fa\u5316\u578b\u548c\u975e\u56fa\u5316\u578b\u3002<br \/>\na.\u805a\u5408\u7269\u57fa\u4f53\uff1a\u6c2f\u4e01\u6a61\u80f6\uff08Neoprene\uff09-\u662f2-\u6c2f-1,3-\u4e01\u4e8c\u70ef\u7684\u5747\u805a\u7269\uff1b\u4e01\u8148\u6a61\u80f6-\u662f1,3-\u4e01\u4e8c\u70ef\u548c\u4e19\u70ef\u8148\u7684\u5171\u805a\u7269\uff1b\u4e01\u82ef\u6a61\u80f6\uff08SBR\uff09-\u662f\u6709\u82ef\u4e59\u70ef\u548c\u4e01\u4e8c\u70ef\u901a\u8fc7\u4e73\u6db2\u805a\u5408\u5f62\u6210\u7684\u65e0\u89c4\u5171\u805a\u7269\uff1b\u4e01\u57fa\u6a61\u80f6-\u662f\u4e01\u70ef\u548c\u5c11\u91cf\u5f02\u620a\u4e8c\u70ef\u7684\u5171\u805a\u7269\uff08\u6eb6\u6db2\u578b\u3001\u56fa\u4f53\u578b\u548c\u79bb\u5b50\u7a33\u5b9a\u578b\u4e73\u6db2\uff09\uff1b<br \/>\nb.\u589e\u7c98\u5242\uff1aPSAs\u6240\u7528\u7684\u589e\u7c98\u5242\u540c\u6837\u9002\u7528\u4e8eRBAs\uff0c\u9009\u62e9\u539f\u5219\u4e5f\u4e0ePSA\u7c7b\u4f3c\uff1b\u6c2f\u4e01\u6a61\u80f6\u57faRBAs-\u53d4\u4e01\u57fa\u915a\u919b\u6811\u8102\uff1b\u4e01\u8148\u6a61\u80f6RBAs-\u677e\u9999\u916f\u548c\u53e4\u9a6c\u9686-\u831a\u6811\u8102\uff1b<br \/>\nc.\u989c\u6599\u548c\u586b\u6599\uff1a\u964d\u4f4e\u6210\u672c\u3001\u8c03\u8282\u7c98\u5ea6\u548c\u89e6\u53d8\u6027\u3001\u6539\u5584\u7a33\u5b9a\u6027\uff08\u6c27\u5316\u950c\u548c\u6c27\u5316\u9541\uff09<br \/>\nd.RBAs\u7684\u4ea4\u8054\/\u786b\u5316\uff08vulcanization\uff09\uff1a\u7528\u786b\u78fa\u4f7f\u5929\u7136\u6a61\u80f6\u548c\u5f39\u6027\u4f53\u57fa\u4ea4\u8054\u3002\u5e38\u89c1\u7684\u786b\u5316\u4f53\u7cfb\u5305\u62ec\u786b\u78fa\u548c\u786b\u5316\u4fc3\u8fdb\u5242\uff1b \u7c98\u6027\u5f00\u653e\u65f6\u95f4\uff08tack open time\uff09<br \/>\ne.\u6eb6\u5242\uff1a\u89e6\u538b\u80f6\u7c98\u5242-contact bond adhesive\uff1b\u7c98\u5408\u529b-knitting ability\uff1b\u521d\u5f3a\u5ea6-green strength\uff1b\u51dd\u805a\u52a9\u5242-coalescing aide<br \/>\n8\u3001\u57fa\u4e8e\u7845\u6c27\u70f7\u5316\u5b66\u6027\u8d28\u7684\u5f39\u6027\u4f53\u57fa\u80f6\u7c98\u5242\u3001\u5bc6\u5c01\u5242\u548c\u9694\u79bb\u6d82\u5c42<br \/>\na.\u7531\u4e8e\u5176\u7279\u6709\u7684\u8010\u5316\u5b66\u6027\u548c\u8010\u5019\u6027\uff0c\u7845\u6c27\u70f7\u5728\u5bc6\u5c01\u80f6\u65b9\u9762\u4e5f\u5f97\u5230\u4e86\u91cd\u5927\u5e94\u7528\uff0c\u7b2c\u4e00\u5bc6\u5c01\u80f6\u5fc5\u987b\u80fd\u591f\u5bf9\u4f17\u591a\u4e0d\u540c\u7684\u57fa\u6750\u90fd\u4ea7\u751f\u826f\u597d\u7684\u7c98\u9644\uff0c\u7b2c\u4e8c\u5bc6\u5c01\u80f6\u5fc5\u987b\u5177\u6709\u663e\u8457\u7684\u5f62\u53d8\u80fd\u529b\uff0c\u7b2c\u4e09\u5bc6\u5c01\u80f6\u4e0d\u80fd\u51fa\u73b0\u6c38\u4e45\u56fa\u5316\u6216\u8005\u663e\u8457\u7684\u7279\u6027\u6ede\u53d8\uff0c\u5728\u4f7f\u7528\u5bff\u547d\u7684\u5927\u90e8\u5206\u65f6\u95f4\u5747\u5e94\u4fdd\u6301\u5f39\u6027\u3002<br \/>\nb.\u9694\u79bb\u6d82\u5c42-release coating \u8131\u7c98-abhesive \u9694\u79bb\u7eb8-release liner \u8f6c\u79fb\u80f6\u5e26-transfer type<br \/>\nc.\u7845\u6c27\u70f7\u7684\u786b\u5316\uff08\u4ea4\u8054\uff09\u7c7b\u578b:\u7f29\u805a\u4ea4\u8054\u548c\u52a0\u6210\u4ea4\u8054\uff0c\u5178\u578b\u7684\u7f29\u805a\u4ea4\u8054\u662fRTV\u7845\u6c27\u70f7\uff08\u5ba4\u6e29\u786b\u5316\u7845\u6c27\u70f7 room temperature vulcanizing silicones\uff09<br \/>\n9\u3001\u603b\u7ed3\uff1a<br \/>\n\u5f39\u6027\u4f53\u57fa\u80f6\u7c98\u5242\u4e3b\u8981\u5206\u4e3a\u4e24\u5927\u7c7b\uff1a\u538b\u654f\u80f6\u7c98\u5242PSA\u548c\u6a61\u80f6\u57fa\u80f6\u7c98\u5242RBA\uff0c\u8fd9\u4e24\u7c7b\u80f6\u7c98\u5242\u7684\u914d\u65b9\u975e\u5e38\u76f8\u4f3c\uff0c\u8fd9\u662f\u56e0\u4e3a\u5b83\u4eec\u5747\u662f\u7531\u5f39\u6027\u4f53\u57fa\u63d0\u4f9b\u4e3b\u8981\u6027\u80fd\uff0c\u5e76\u901a\u8fc7\u52a0\u5165\u589e\u7c98\u5242\u548c\u4ea4\u8054\u5242\u5bf9\u5176\u6027\u80fd\u8fdb\u884c\u6539\u8fdb\u3002\u8fd9\u4e24\u7c7b\u80f6\u7c98\u5242\u7684\u4e3b\u8981\u533a\u522b\u662f\uff1aPSA\u662f\u5e72\u6027\u7684\uff0c\u5e76\u4e14\u968f\u65f6\u53ef\u4ee5\u5546\u54c1\u5f62\u5f0f\u8fdb\u884c\u4f7f\u7528\uff1b\u800cRBA\u901a\u5e38\u5b58\u5728\u4e8e\u8f7d\u4f53\uff08\u6eb6\u5242\u6216\u6c34\uff09\u4e2d\uff0c\u5fc5\u987b\u5c06\u5176\u8f7d\u4f53\u6392\u9664\u540e\uff0c\u65b9\u80fd\u5f62\u6210\u6709\u6548\u7684\u80f6\u63a5\u4ef6\u3002\u53e6\u5916\u8fd8\u8ba8\u8bba\u4e86\u4e00\u79cd\u7279\u6b8a\u5f62\u5f0f\u7684\u5f39\u6027\u4f53\u80f6\u7c98\u5242-\u7845\u6c27\u70f7\u80f6\u7c98\u5242\uff0c\u8fd9\u79cd100%\u7684 \u56fa\u4f53\u6750\u6599\u7ecf\u8fc7\u9002\u5f53\u56fa\u5316\u540e\u53ef\u5f62\u6210\u4e00\u79cd\u5f39\u6027\u4f53\u3002<\/p>\n","protected":false},"excerpt":{"rendered":"<p>1\u3001\u538b\u654f\u80f6\u7c98\u5242\uff08PSA-Pressure Sensitive Adhesive\uff09\u7684\u5b9a\u4e49\uff1a a. \u7c98\u6027\u5f3a\u529b\u4e14\u6301\u4e45 [&hellip;]<\/p>\n","protected":false},"author":1,"featured_media":3426,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":[],"categories":[5],"tags":[683,65],"_links":{"self":[{"href":"http:\/\/www.g4e.cn\/wordpress\/wp-json\/wp\/v2\/posts\/275"}],"collection":[{"href":"http:\/\/www.g4e.cn\/wordpress\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"http:\/\/www.g4e.cn\/wordpress\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"http:\/\/www.g4e.cn\/wordpress\/wp-json\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"http:\/\/www.g4e.cn\/wordpress\/wp-json\/wp\/v2\/comments?post=275"}],"version-history":[{"count":0,"href":"http:\/\/www.g4e.cn\/wordpress\/wp-json\/wp\/v2\/posts\/275\/revisions"}],"wp:featuredmedia":[{"embeddable":true,"href":"http:\/\/www.g4e.cn\/wordpress\/wp-json\/wp\/v2\/media\/3426"}],"wp:attachment":[{"href":"http:\/\/www.g4e.cn\/wordpress\/wp-json\/wp\/v2\/media?parent=275"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"http:\/\/www.g4e.cn\/wordpress\/wp-json\/wp\/v2\/categories?post=275"},{"taxonomy":"post_tag","embeddable":true,"href":"http:\/\/www.g4e.cn\/wordpress\/wp-json\/wp\/v2\/tags?post=275"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}