SQL XML Query with xpath defined in table

I am trying to extract some data from XML using SQL Query, i am having issue in getting values if XPath is defined in a table and using that in Query. Here is the example

 DECLARE @StudentData XML
SET @StudentData ='<StudentData xmlns:xsd="http://ift.tt/tphNwY" xmlns:xsi="http://ift.tt/ra1lAU">
  <Properties>
    <Property>
      <Name>RollNumber</Name>
      <Value>2127</Value>
    </Property>
    <Property>
      <Name>SudentName</Name>
      <Value>ABCD</Value>
    </Property>
    <Property>
      <Name>Subject1</Name>
      <Value>80</Value>
    </Property>
    </Properties>
</StudentData>';
CREATE TABLE #PropertyPath (    
    [XPath] VARCHAR (2000)   NOT NULL    
);

INSERT INTO #PropertyPath
SELECT '(/StudentData/Properties/Property[Name=''RollNumber'']/Value)[1]'
UNION 
SELECT '(/StudentData/Properties/Property[Name=''SudentName'']/Value)[1]'

SELECT @StudentData.value('(/*[local-name() = sql:column("[XPath]")])[1]','VARCHAR(100)'),XPath
FROM  #PropertyPath 

SELECT @StudentData.value('(/StudentData/Properties/Property[Name=''RollNumber'']/Value)[1]','VARCHAR(100)'),
@StudentData.value('(/StudentData/Properties/Property[Name=''SudentName'']/Value)[1]','VARCHAR(100)')
FROM  @StudentData.nodes('/') as x(t)   

DROP TABLE #PropertyPath

Am i doing anything wrong or is it not possible?