A polymer composite, comprising: a first polymer comprising a structure as in Formula: or a pharmaceutically acceptable salt thereof, wherein: each R 1 is the same or different and is selected from the group consisting of optionally substituted alkylene, optionally substituted heteroalkylene, optionally substituted arylene, and optionally substituted heteroarylene; each R 2 is the same or different and is selected from the group consisting of hydrogen, optionally substituted alkyl, and optionally substituted heteroalkyl; each R 3 is the same or different and is selected from the group consisting of optionally substituted alkylene and optionally substituted heteroalkylene; n is an integer between 25 and 250,000; and a second polymer comprising a structure as in Formula hydrogen bonded to the first polymer: or a pharmaceutically acceptable salt thereof, wherein: each R 4 is the same or different and is selected from the group consisting of optionally substituted alkylene and optionally substituted heteroalkylene; each R 5 is the same or different and is selected from the group consisting of optionally substituted alkylene and optionally substituted heteroalkylene; each R 6 is the same or different and is selected from the group consisting of hydrogen, optionally substituted alkyl, and optionally substituted heteroalkyl; each R 7 is the same or different and is selected from the group consisting of hydrogen, optionally substituted alkyl, and optionally substituted heteroalkyl; each R 8 is the same or different and is optionally substituted alkyl; p is an integer between 1 and 10; q is an integer between 1 and 10; and z is an integer between 1 and 150,000, provided that (p + q) ∗ z is greater than or equal to 20. a first polymer comprising a structure as in Formula: or a pharmaceutically acceptable salt thereof, wherein: each R 1 is the same or different and is selected from the group consisting of optionally substituted alkylene, optionally substituted heteroalkylene, optionally substituted arylene, and optionally substituted heteroarylene; each R 2 is the same or different and is selected from the group consisting of hydrogen, optionally substituted alkyl, and optionally substituted heteroalkyl; each R 3 is the same or different and is selected from the group consisting of optionally substituted alkylene and optionally substituted heteroalkylene; n is an integer between 25 and 250,000; and each R 1 is the same or different and is selected from the group consisting of optionally substituted alkylene, optionally substituted heteroalkylene, optionally substituted arylene, and optionally substituted heteroarylene; each R 2 is the same or different and is selected from the group consisting of hydrogen, optionally substituted alkyl, and optionally substituted heteroalkyl; each R 3 is the same or different and is selected from the group consisting of optionally substituted alkylene and optionally substituted heteroalkylene; n is an integer between 25 and 250,000; and a second polymer comprising a structure as in Formula hydrogen bonded to the first polymer: or a pharmaceutically acceptable salt thereof, wherein: each R 4 is the same or different and is selected from the group consisting of optionally substituted alkylene and optionally substituted heteroalkylene; each R 5 is the same or different and is selected from the group consisting of optionally substituted alkylene and optionally substituted heteroalkylene; each R 6 is the same or different and is selected from the group consisting of hydrogen, optionally substituted alkyl, and optionally substituted heteroalkyl; each R 7 is the same or different and is selected from the group consisting of hydrogen, optionally substituted alkyl, and optionally substituted heteroalkyl; each R 8 is the same or different and is optionally substituted alkyl; p is an integer between 1 and 10; q is an integer between 1 and 10; and z is an integer between 1 and 150,000, provided that (p + q) ∗ z is greater than or equal to 20. each R 4 is the same or different and is selected from the group consisting of optionally substituted alkylene and optionally substituted heteroalkylene; each R 5 is the same or different and is selected from the group consisting of optionally substituted alkylene and optionally substituted heteroalkylene; each R 6 is the same or different and is selected from the group consisting of hydrogen, optionally substituted alkyl, and optionally substituted heteroalkyl; each R 7 is the same or different and is selected from the group consisting of hydrogen, optionally substituted alkyl, and optionally substituted heteroalkyl; each R 8 is the same or different and is optionally substituted alkyl; p is an integer between 1 and 10; q is an integer between 1 and 10; and z is an integer between 1 and 150,000, provided that (p + q) ∗ z is greater than or equal to 20.