Yes, certainly, if they relate to the same overall research question.
Remember to reference yourself. Decide in each case whether to quote from your paper, or use the whole paper as a chapter. Obviously you will bring the old paper up to date, and link it into your Research Question. The great thing about this approach is that when your examiner is asked the question: Is part of this thesis publishable, he / she has to answer "Yes" to the question!
Yes, certainly, if they relate to the same overall research question.
Remember to reference yourself. Decide in each case whether to quote from your paper, or use the whole paper as a chapter. Obviously you will bring the old paper up to date, and link it into your Research Question. The great thing about this approach is that when your examiner is asked the question: Is part of this thesis publishable, he / she has to answer "Yes" to the question!
It would be better to NOT use the exact text fro yoiur journal article in your chapter. Say the same things, and reference yourself, but rewrite to use different words.