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mayong11

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telomerase(½ð±Ò-1,VIP+0):Çë×¢Ò⣡£¡£¡ÕâÑù»áºÜÎó±ðÈ˵ÄÊµģ¡£¡ ÑÏÖØ¾¯¸æ£¡£¡£¡ 3-10 19:46
ggaoxx(½ð±Ò-2,VIP+0):ÑÏÀ÷´ò»÷´ËÀàÐÐΪ£¡ 3-11 10:45
(1) organic polymers at high temperature first broken down into much smaller molecular weight chains and small molecules, it does not melt at the thermosetting resin degradation process will arise in the so-called "liquefaction" phenomenon. In a vacuum, they become "liquid"-like small polymer fragments and small molecules of volatile substances is extremely easy.
2) The organic polymer in the pyrolysis process on the performance of macro-Samples for the experiment to accelerate the weight loss rate, that is, with the pyrolysis temperature increased, the degradation reaction rate accelerated, the formation of smaller fragments, and the temperature itself so that these degradation products more vulnerable to evaporation.
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2Â¥2009-03-10 18:39:00
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210jiejie

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3Â¥2009-03-10 19:41:30
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nigo

½ð³æ (ÖøÃûдÊÖ)

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ggaoxx(½ð±Ò+2,VIP+0):лл²ÎÓ룡 3-11 10:45
telomerase(½ð±Ò+15,VIP+0):ÀͶ¯ËùµÃ£¬ÇëÊÕÏ£¡£¡ 4-3 11:15
Organic polymers will decomposite into many small molecular weight chains and small molecules, Thus the infusible thermosetting resin will liquefy when they degrade. These small fluid polymer fractions and small molecules should be volatile in vaccum condition.
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4Â¥2009-03-10 20:04:40
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polymerpark

½ð³æ (Ö°Òµ×÷¼Ò)

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ggaoxx(½ð±Ò+2,VIP+0):лл²ÎÓ룡 3-11 10:45
telomerase(½ð±Ò+15,VIP+0):ÀͶ¯ËùµÃ£¬ÇëÊÕÏ£¡£¡ 4-3 11:16
Organic polymers firstly break into many chains and substances with lower molecular weight,thus non-melt thermosetting resins arise so called"liquification" during the process of degradation.These small polymer chains and substances already "liquification" inevitably volatile easily under vaccum.

[ Last edited by polymerpark on 2009-3-11 at 06:44 ]
5Â¥2009-03-11 06:42:44
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yishi

210jiejie(½ð±Ò+30,VIP+0):дµÄºÜºÃ£¡È«²¿½±Àø 3-11 09:03
telomerase(½ð±Ò-23,VIP+0):·Ç·¨×ªÒƽð±Ò£¬¿Û³ýÁË£¡£¡£¡Çë×¢Òâ¡£¾¯¸æ£¡ 4-2 21:30
telomerase(½ð±Ò-7,VIP+0):·Ç·¨×ªÒƽð±Ò£¬¿Û³ýÁË£¡£¡£¡ 4-2 21:31
The organic polymers was decomposed to small chains and low molecular weight products firstly at high temperature, liquefaction phenomenon was also arose in the degradation process of thermosetting resin consequently. These small fragments and products were extremely easy to volatilize under vacuum condition. In the pyrolysis process, the weight-loss rate of  polymers  was accelerated, that is, the increase of pyrolysis temperature results in a sharp increase in the degradation reaction rate, moreover, degradation products were vulnerable to volatilize at high temperature.
6Â¥2009-03-11 09:02:44
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