PROBLEM TO BE SOLVED: To provide a surface modification method of a vulcanized rubber or a thermoplastic elastomer, by which various functions such as significant sliding property and biocompatibility can be economically advantageously imparted to a target material in accordance with the purposes.SOLUTION: The surface modification method is applied to a vulcanized rubber or a thermoplastic elastomer as a modification target, and the method includes: a step 1 of forming a polymerization initiation point A on a surface of the modification target a step 2 of initiating radical polymerization of nonfunctional monomers from the polymerization initiation point A to grow nonfunctional polymer chains a step 3 of forming a polymerization initiation point B on a surface of the nonfunctional polymer chains a step 4 of treating the surface of the nonfunctional polymer chains where the polymerization initiation point B is formed with fluorine-containing functional monomers, and then holding the target material at 40 to 100°C and a step 5 of radically polymerizing the fluorine-containing functional monomers to grow fluorine-containing functional polymer chains.COPYRIGHT: (C)2015,JPO&INPIT【課題】用途に応じて、顕著な摺動性、生体適合性などの様々な機能性を経済的に有利に付与できる加硫ゴム又は熱可塑性エラストマーの表面改質方法を提供する。【解決手段】加硫ゴム又は熱可塑性エラストマーを改質対象物とする表面改質方法であって、前記改質対象物の表面に重合開始点Aを形成する工程1と、前記重合開始点Aを起点にして非機能性モノマーをラジカル重合させて非機能性ポリマー鎖を成長させる工程2と、前記非機能性ポリマー鎖の表面に重合開始点Bを形成する工程3と、前記重合開始点Bが形成された前記非機能性ポリマー鎖の表面を、フッ素含有機能性モノマーで処理した後、40~100℃で保持する工程4と、前記フッ素含有機能性モノマーをラジカル重合させてフッ素含有機能性ポリマー鎖を成長させる工程5とを含む表面改質方法に関する。【選択図】なし
