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爱闻网>>聚酯频道>>聚酯工艺>>新闻内容 |
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<%
for i=1 to rs.pagesize
if rs.eof then
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end if
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聚乙交酯的合成 |
爱闻网
聚酯频道 http://juzhi.anywen.com 2007-5-10 16:10:18 |
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利用搅拌反应釜合成了聚乙交酯(PGA);应用红外光谱、核磁共振等对聚合物的结构进行了表征;研究了PGA聚合过程中特性粘数、单体转化率、聚合物的热稳定性等的变化.
结果表明:聚合物转化率和聚合物特性粘数的变化趋势相同,反应开始阶段变化较慢,随后加快,最后趋于平缓.聚合时间为105 min时,聚合物的特性粘数达到最大为1.0 dL/g,单体的转化率为99.0﹪,随着特性粘数的增加,聚合物的热稳定性提高;PGA的流变性能受相对分子质量影响显著,没有反应完全的试样仍具有聚合活性.
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rs.MoveNext
next
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| 最新文章 |
<%
Set rs_News = Server.CreateObject("adodb.Recordset")
set rs_news = Conn.Execute("Select top 10 title,NewsPath,FileName,FileExtName from News where ztClassID =" & GetztClassID("聚酯切片") & " and DelFlag=0 and Audit=1 and NewsSBS2<>1 and PlacardTF2<>1 and RecTF2<>1 order by AddNewsDate desc")
if rs_News.eof and rs_News.bof then
else
do while not rs_News.eof
Ttitle=rs_News("title")
Tfilename=rs_News("FileName")
Tlinks="../"&rs_News("NewsPath")&Tfilename&"."&rs_News("FileExtName")
%>
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<%
rs_News.movenext
loop
end if
rs_News.Close
Set rs_News = Nothing
%>
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<%
Set rs_News = Server.CreateObject("adodb.Recordset")
set rs_news = Conn.Execute("Select top 12 title,NewsPath,FileName,FileExtName from News where ztClassID =" & GetztClassID("聚酯切片") & " and DelFlag=0 and Audit=1 and NewsSBS2<>1 and PlacardTF2<>1 and RecTF2<>1 order by AddNewsDate desc")
if rs_News.eof and rs_News.bof then
else
do while not rs_News.eof
Ttitle=rs_News("title")
Tfilename=rs_News("FileName")
Tlinks="../"&rs_News("NewsPath")&Tfilename&"."&rs_News("FileExtName")
%>
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<%
rs_News.movenext
loop
end if
rs_News.Close
Set rs_News = Nothing
%>
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