Kipping, when performed improperly, can end up placing high amounts of strain and stress on the connective tissues of the elbow and shoulder.That said, kipping is a foundational aspect of many CrossFit workouts, and can be performed safely, but it is not recommended for the chin-up.
If you are having issues doing strict chin-ups, consider utilizing bands, while also strengthening the muscles with movements like underhand rows, underhand pulldowns, and curls.