PVC electrical conduit connection to service panel
Short answer: no it is not acceptable it needs to be continuous.

The pertinent article of the National Electrical Code follows:


  300.12 Mechanical Continuity — Raceways and Cables
  Metal or nonmetallic raceways, cable armors, and cable sheaths shall be continuous between cabinets, boxes, fit- tings, or other enclosures or outlets.


You could terminate the conduit into a junction box and then take a cable that is approved to be fished into walls (NM or MC) from there. Then make joints in the j-box. However, the j-box has to be accessible after it is installed.

Good luck with your project!