| 查看: 438 | 回复: 0 | |||
[交流]
TG-DTG技术表征橡胶的硫化
|
|
Two common problems in the TG-DTG analysis of unknown elastomer vulcanizates and probable solutions are discussed. The first problem concerns the difficulty in quantitatively determining the oil and elastomer in the compound in cases where their volatilization temperature range overlaps. After a review of the published works which studied this problem, isothermal TG (with or without vacuum) along with the use of "High Resolution" TG equipment is recommended. The second problem concerns separate determination of carbon residue from the elastomers and added carbon black in the compound, which very often oxidizes together. Subtraction of the carbon residue formed by the elastomers, determined by previous analyses, from the total weight loss in oxygen, was suggested in the literature. However, the quantity of char depends on type of the elastomer, as well as its concentration, curative type and amount and rate of heating. The problem is not, therefore, fully resolved. Experiments under slow feed of lean oxygen gas and isothermal temperature were also suggested in the literature. Under this condition, oxidation of carbon black and char may occur at slightly different temperatures and overlapping is minimized. However, this could be achieved only for large and medium particle size blacks (soft blacks) which oxidize at higher temperatures and not for the smaller particle size blacks, (used mostly in tire treads). Further work under slow feed of lean oxygen with a superimposed isothermal program and/or vacuum is recommended. The capability of the recently announced "High Resolution Thermogravimetric Analyzer" should also be explored. |
回复此楼» 本帖附件资源列表
-
欢迎监督和反馈：小木虫仅提供交流平台，不对该内容负责。
本内容由用户自主发布，如果其内容涉及到知识产权问题，其责任在于用户本人，如对版权有异议，请联系邮箱：xiaomuchong@tal.com - 附件 1 : TG-DTG的技术表征橡胶的硫化.PDF
2016-03-30 15:16:53, 482.56 K
» 猜你喜欢
塑料油分析测试
已经有1人回复
-
大连工业大学招硕士研究生
已经有0人回复
-
专业论文润色/翻译怎么收费?
已经有153人回复
-
武汉纺织大学招收化学化工类和材料类研究生调剂生若干名
已经有9人回复
-
河南某一本高校招收材料，化工，化学调剂生
已经有0人回复
-
生物质能方向，招光/电催化博士
已经有0人回复
-
国家级人才课题组招收2026年化学，材料化工 调剂生
已经有0人回复
-
国家级人才团体课题组招收2026届化学类学硕，专硕。
已经有0人回复
-
国家级人才课题组招收2026年化学，材料化工 调剂生
已经有0人回复
-
大连工业大学招硕士研究生
已经有0人回复
-
国家级人才课题组招收2026年化学，材料化工 调剂生
已经有0人回复
