The tuned-morphology studies of the complexes between poly(N-isopropylacrylamide)-b-poly(vinylpyridine) and poly(N-isopropylacrylamide-co-hydroxylethyl methacrylate)-b-poly(vinylphenol).
Poly(N-isopropylacrylamide)-b-poly(vinylpyridine) (PNIPAAm-b-PVP) and poly(N-isopropylacrylamide-co-hydroxylethyl methacrylate)-b-poly(vinylphenol) (P(NIPAAm-co-HEMA)-b-PVPhol) were synthesized by reversible addition-fragmentation chain transfer (RAFT) polymerization. Above two copolymers could form complex in pure water and in DMF/water environment with the DMF content lower than 40% by hydrogen bondings. The morphologies of the complex were investigated by transmission electron microscope (TEM). It was found that the dimension of the complex in strong acid (pH 1.0) or base environment (pH 12.0) was smaller than the one in weak acid or in neutral environment. After the shell cross-linking of the complex, the complex showed a type of "swollen" state in acid or base environment which is similar to the properties of microgel.
Li
Yong-Yong
YY
Key Laboratory of Biomedical Polymers of Ministry of Education & Department of Chemistry, Wuhan University, Wuhan, PR China.
Dai
Yu
Y
Zhang
Xian-Zheng
XZ
Zhuo
Ren-Xi
RX
D000178:Acrylamides / Q000737:chemistry*; D000180:Acrylic Resins; D006860:Hydrogen Bonding; D008689:Methacrylates / Q000737:chemistry*; D010636:Phenols / Q000737:chemistry*; D011108:Polymers / Q000737:chemistry*; D011145:Polyvinyls / Q000737:chemistry*; D011725:Pyridines / Q000737:chemistry*
D000178:Acrylamides; D000180:Acrylic Resins; D008689:Methacrylates; D010636:Phenols; D011108:Polymers; D011145:Polyvinyls; D011725:Pyridines; C052970:poly-N-isopropylacrylamide; C005044:hydroxyethyl methacrylate