Ahlam - I would personally argue the latter. You can't convert all your chapters to publications i.e. chapter 1 and the final chapter - but you can get several chapters i.e. lit review, methodology (if novel) and overall findings - national and international. If, for instance, mixed methods - then you can potentially seperate out qualitative and quantitative findings.
A PhD thesis tends to be a 'bloated' version of study events designed to give all the possible information available to examiners. Ask an examiner - marking a thesis is a long and labour-intensive task when done correctly. Imagine a reader (for pleasure) going though the same process. Attached is a published PhD monograph (at the end of the pages) that I reviewed some time ago, as Review Editor at the time, which is representative off how I view PhD monographs. I can't be the only one that thinks this way.
The answer depends on the field of science. Natural sciences like physics, biology etc. prefer papers, whereas humanitarian/social sciences like history, sociology etc. tend to prefer monographs. Your thesis advisor may have an advise for your field.