Purdue has access to Perry's on two different ebook platforms. Depending on your preference, you can use either. Both sites contain the contents of the entire 8th edition.
Knovel has e-books in Chemistry and Chemical Engineering, including Plant Design and Operation and data on many chemical properties of compounds. Knovel also contains interactive graphs and diagrams. Hint: Simply search for the name of the compound and the property you are looking for, such as benzene and "boiling point." Notable titles include:
CRCnetBASE is a collection similar to Knovel, that has titles related to chemistry and chemical engineering. It also contains a number of handbooks related to data on polymers. You can search across the entire collection or connect directly to specific titles of interest below:
Kinetics data is difficult to find because each set of reaction conditions is unique. Searching the literature is a good way to find this data, otherwise there area a few databases that might help.
These are other individual titles you might consider consulting if Knovel and CRCnetBASE do not have what you need. There are also a number of print resources within the Library of Engineering & Science that you might find useful.
The NIST-JANAF tables are located in the Print Repositories (Closed - Request).
The DECHEMA Chemistry Data Series.
Another LibGuide devoted to sources for Chemical and Physical Data. It is continually being updated and contains additional links not found in this LibGuide.