交联大分子的合成与表征

设计了含有分子内反应和分子间反应的聚合体系，这是一对竞争反应，竞争的结果可达到一定的平衡，使无法控制的凝胶化过程得以控制，从而合成了具有交联结构的大分子。通过分子尺寸的测定还发现了交联大分子在溶液中的特殊行为，这种特殊行为恰好验证了所合成的大分子具有交联结构。

SYNTHESIS AND CHARACTERIZATION OF MACROMOLECULE WITH CROSSLINKED STRUCTURE

As all known macromolecules are consist of linear, branched, comb, star and cyclic macromolecules. Because the crosslinked polymer is insoluble and not melted and crosslinking polymerization can not be controlled, macaromolecule with crosslinked structure has not been produced by now. In this paper the system with intermolecular reaction and intramolecular reaction was designed. Intermolecular reaction makes molecular weight of macromolecule rise continuously and forms crosslinking structure. In intramolecular reaction the active end-groups would be expensed and it prevents intermolecular reaction from developing unlimitedly, and the crosslinking polymerization process is controlled. It is crosslinked macromolecule instead of crosslinked polymer that is formed. The breaking elongation of samples in our paper is 2180%, which is very high and not seen in literatures. Through the measurement of molecular size, from the characterization of samples in solutions macromolecule synthesized possesses net-like structure.