Dissolution of PLGA in dichloromethane

Hi, here is a dumb question from a molecular biologist
I am trying to dissolve PLGA (ratio 50:50, 65:36, 75:25 and 85:15) in
dichloromethane (DCM), but it doesn't seem to dissolve under vortex.
Any suggestions?
Thanks!
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thanks al for your help I could you explain tha many papers dissolve PLGA in dichloromethane? does this depend on the lactide:glycolide ratio??
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