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用FT－IR研究发现，在丙烯腈与丙烯酸甲酯的共聚物（PANMA）与聚L-丙氨酸（PLAL）的共混体系中，丝素（SF）与PANMA的共混体系及SF与聚丙烯酸钠（NA）的共混体系中，含有羰基或其它极性基团的高分子与SF形成强弱不等的氢键．由于氢键的形成,使SF分子不得不调整自身的构象，从而引起其构象转变．讨论了可能的分子间氢键的结构．
FT-IR study found that blends of SF and PANMA and blends of SF and PLMA in the blends of PANMA and PLAL, Sodium polyacrylate (NA) blends, containing carbonyl or other polar groups of polymers and SF formation of hydrogen bonds with different strengths. Due to the formation of hydrogen bonds, SF molecules have to adjust their own conformation, causing its conformational transition. The possible intermolecular hydrogen bonding structure is discussed.