Try with the following conversion script
&{foreach($row in (Import-Csv C:\Aravind\VM.csv -UseCulture)){
$first = $true
if($row."VM name" -match ','){
($row."VM name").Split(',') | %{
New-Object PSObject -Property @{
Properties = &{
if($first){
$row.Properties
$first = $false
}}
"VM name" = $_
}
}
}
else{$row}
}} | Export-Csv new-report.csv -NoTypeInformation -UseCulture