Function to Add DISQUS to WooCommerce product pages.

woo_disqus.php

function disqus_embed($disqus_shortname) {
    global $post;
    wp_enqueue_script('disqus_embed','http://'.$disqus_shortname.'.disqus.com/embed.js');
    echo '<div id="disqus_thread"></div>
    <script type="text/javascript">
        var disqus_shortname = "'.$disqus_shortname.'";
        var disqus_title = "'.$post->post_title.'";
        var disqus_url = "'.get_permalink($post->ID).'";
        var disqus_identifier = "'.$disqus_shortname.'-'.$post->ID.'";
    </script>';
}

function add_disqus_embed(){
	disqus_embed('yourdisqussitename');
}

add_action( 'woocommerce_after_single_product', 'add_disqus_embed');