Hi, here's what I suggest:
1. First, you need to convert the .doc file to pdf format where you need a pdf creator. Here in the following link I give you a list of pdf creators to choose from.(e.g. Cute PDF Writer, Primo PDF Creator)
http://www.anypdftools.com/free-word-to-pdf-creator.html
2. After converting the .doc to .pdf, you need a pdf splitter. Since you have 300 pages to split, you'd better find a relatively professional splitter.
AnyBizSoft PDF Splitter may help you. It is a wonderful tool to split large PDF files into small ones quickly and flexibly. And it provides you multiple modes to choose from, such as split by every n pages, by bookmarks, by page ranges, etc.
Here you can set the mode to split by every 1 page, and you'll get the files need in seconds.
Here’s the download link for the PDF splitter
http://www.anypdftools.com/pdf-splitter.html
Give it a shot! And hope it helps.