JP5379470B2 - 刺激応答性高分子架橋体およびその製造方法 - Google Patents
刺激応答性高分子架橋体およびその製造方法 Download PDFInfo
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- JP5379470B2 JP5379470B2 JP2008333574A JP2008333574A JP5379470B2 JP 5379470 B2 JP5379470 B2 JP 5379470B2 JP 2008333574 A JP2008333574 A JP 2008333574A JP 2008333574 A JP2008333574 A JP 2008333574A JP 5379470 B2 JP5379470 B2 JP 5379470B2
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- 238000010907 mechanical stirring Methods 0.000 description 1
- 239000012567 medical material Substances 0.000 description 1
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- 125000002496 methyl group Chemical group [H]C([H])([H])* 0.000 description 1
- XJRBAMWJDBPFIM-UHFFFAOYSA-N methyl vinyl ether Chemical compound COC=C XJRBAMWJDBPFIM-UHFFFAOYSA-N 0.000 description 1
- 239000011259 mixed solution Substances 0.000 description 1
- 238000003541 multi-stage reaction Methods 0.000 description 1
- SDYRIBONPHEWCT-UHFFFAOYSA-N n,n-dimethyl-2-phenylethenamine Chemical compound CN(C)C=CC1=CC=CC=C1 SDYRIBONPHEWCT-UHFFFAOYSA-N 0.000 description 1
- KKFHAJHLJHVUDM-UHFFFAOYSA-N n-vinylcarbazole Chemical compound C1=CC=C2N(C=C)C3=CC=CC=C3C2=C1 KKFHAJHLJHVUDM-UHFFFAOYSA-N 0.000 description 1
- 125000002347 octyl group Chemical group [H]C([*])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])[H] 0.000 description 1
- 125000006353 oxyethylene group Chemical group 0.000 description 1
- 230000036961 partial effect Effects 0.000 description 1
- 125000001997 phenyl group Chemical group [H]C1=C([H])C([H])=C(*)C([H])=C1[H] 0.000 description 1
- 230000000704 physical effect Effects 0.000 description 1
- 229920002857 polybutadiene Polymers 0.000 description 1
- 229920000573 polyethylene Polymers 0.000 description 1
- 239000003505 polymerization initiator Substances 0.000 description 1
- 230000000379 polymerizing effect Effects 0.000 description 1
- 229920001155 polypropylene Polymers 0.000 description 1
- 229920000909 polytetrahydrofuran Polymers 0.000 description 1
- 239000002244 precipitate Substances 0.000 description 1
- 230000008569 process Effects 0.000 description 1
- 150000003220 pyrenes Chemical class 0.000 description 1
- 238000010526 radical polymerization reaction Methods 0.000 description 1
- 230000000630 rising effect Effects 0.000 description 1
- 150000003839 salts Chemical class 0.000 description 1
- 239000007787 solid Substances 0.000 description 1
- 238000001179 sorption measurement Methods 0.000 description 1
- 125000004079 stearyl group Chemical group [H]C([*])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])[H] 0.000 description 1
- 229920000208 temperature-responsive polymer Polymers 0.000 description 1
- MDDUHVRJJAFRAU-YZNNVMRBSA-N tert-butyl-[(1r,3s,5z)-3-[tert-butyl(dimethyl)silyl]oxy-5-(2-diphenylphosphorylethylidene)-4-methylidenecyclohexyl]oxy-dimethylsilane Chemical compound C1[C@@H](O[Si](C)(C)C(C)(C)C)C[C@H](O[Si](C)(C)C(C)(C)C)C(=C)\C1=C/CP(=O)(C=1C=CC=CC=1)C1=CC=CC=C1 MDDUHVRJJAFRAU-YZNNVMRBSA-N 0.000 description 1
- 125000003396 thiol group Chemical group [H]S* 0.000 description 1
- DVKJHBMWWAPEIU-UHFFFAOYSA-N toluene 2,4-diisocyanate Chemical compound CC1=CC=C(N=C=O)C=C1N=C=O DVKJHBMWWAPEIU-UHFFFAOYSA-N 0.000 description 1
- 125000005628 tolylene group Chemical group 0.000 description 1
- 125000002088 tosyl group Chemical group [H]C1=C([H])C(=C([H])C([H])=C1C([H])([H])[H])S(*)(=O)=O 0.000 description 1
- VZCYOOQTPOCHFL-UHFFFAOYSA-N trans-butenedioic acid Natural products OC(=O)C=CC(O)=O VZCYOOQTPOCHFL-UHFFFAOYSA-N 0.000 description 1
- PQDJYEQOELDLCP-UHFFFAOYSA-N trimethylsilane Chemical group C[SiH](C)C PQDJYEQOELDLCP-UHFFFAOYSA-N 0.000 description 1
Classifications
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- C08F—MACROMOLECULAR COMPOUNDS OBTAINED BY REACTIONS ONLY INVOLVING CARBON-TO-CARBON UNSATURATED BONDS
- C08F220/00—Copolymers of compounds having one or more unsaturated aliphatic radicals, each having only one carbon-to-carbon double bond, and only one being terminated by only one carboxyl radical or a salt, anhydride ester, amide, imide or nitrile thereof
- C08F220/02—Monocarboxylic acids having less than ten carbon atoms; Derivatives thereof
- C08F220/52—Amides or imides
- C08F220/54—Amides, e.g. N,N-dimethylacrylamide or N-isopropylacrylamide
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- C08F2/00—Processes of polymerisation
- C08F2/46—Polymerisation initiated by wave energy or particle radiation
- C08F2/48—Polymerisation initiated by wave energy or particle radiation by ultraviolet or visible light
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- C08F—MACROMOLECULAR COMPOUNDS OBTAINED BY REACTIONS ONLY INVOLVING CARBON-TO-CARBON UNSATURATED BONDS
- C08F20/00—Homopolymers and copolymers of compounds having one or more unsaturated aliphatic radicals, each having only one carbon-to-carbon double bond, and only one being terminated by only one carboxyl radical or a salt, anhydride, ester, amide, imide or nitrile thereof
- C08F20/02—Monocarboxylic acids having less than ten carbon atoms, Derivatives thereof
- C08F20/10—Esters
- C08F20/38—Esters containing sulfur
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- C08F28/00—Homopolymers and copolymers of compounds having one or more unsaturated aliphatic radicals, each having only one carbon-to-carbon double bond, and at least one being terminated by a bond to sulfur or by a heterocyclic ring containing sulfur
- C08F28/02—Homopolymers and copolymers of compounds having one or more unsaturated aliphatic radicals, each having only one carbon-to-carbon double bond, and at least one being terminated by a bond to sulfur or by a heterocyclic ring containing sulfur by a bond to sulfur
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- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08F—MACROMOLECULAR COMPOUNDS OBTAINED BY REACTIONS ONLY INVOLVING CARBON-TO-CARBON UNSATURATED BONDS
- C08F290/00—Macromolecular compounds obtained by polymerising monomers on to polymers modified by introduction of aliphatic unsaturated end or side groups
- C08F290/02—Macromolecular compounds obtained by polymerising monomers on to polymers modified by introduction of aliphatic unsaturated end or side groups on to polymers modified by introduction of unsaturated end groups
- C08F290/06—Polymers provided for in subclass C08G
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Description
本発明の一実施形態に係る刺激応答性高分子架橋体は、図1に模式的に示す方法により製造することができる。
(1)ポリマー(A)の合成
α−シクロデキストリン(ナカライテスク社製)5gをジメチルホルムアミド50mlに溶解させ、この溶液にトリレン2,4−ジイシアネート末端ポリプロピレングリコール(Aldrich社製,Mn:1,000)3.4gと、錫触媒であるジブチル錫ジラウレート(東京化成社製)200mgとを加え、20時間室温で攪拌した。
ポリエチレングリコール(和光純薬工業社製,Mn:1000)5gを塩化メチレン50mlに溶解させ、この溶液に3,5−ジメチルフェニルイソシアネート(Aldrich社製)1.6gと、錫触媒であるジブチル錫ジラウレート(東京化成社製)200mgとを加え、室温で20時間攪拌した。続いて、その溶液に2−メタクリロイルオキシエチルイソシアネート(昭和電工社製,製品名「カレンズMOI」)1.7gと、ジブチル錫ジラウレート(東京化成社製)100mgとを加え、更に室温で20時間撹拌した。得られた溶液を濃縮後、−75℃に冷却したジエチルエーテルに沈澱させて沈殿物を回収し、一方の末端に3,5−ジメチルフェニル基からなるブロック基を有し、他方の末端にメタクリロイル基を有するポリエチレングリコール(以下「MA−PEG−DPI」という;直鎖状分子(B))3.8gを得た。
ポリマー(A)300mgを0.4wt%の水酸化ナトリウム水溶液1mlに溶解させ、この溶液に直鎖状分子(B)200mgを加え、機械的に攪拌しながら超音波照射(35Hz)を5分行ったところ、溶液が白濁し、粘性が上昇した。このような粘度上昇した白濁物は、ポリマー(A)の環状部分が直鎖状分子(B)を包接してなる高分子架橋前駆体(C)であると考えられる。
上記白濁物に、刺激応答性化合物(D)としてN−イソプロピルアクリルアミド2.0gを加え、均一になるまで攪拌した。次いで、光重合開始剤である1−ヒドロキシ−シクロヘキシル−フェニル−ケトン/ベンゾフェノン共融混合物(チバ・スペシャリティー・ケミカルズ社製,製品名「IRGACURE 500」)40μlを加え、撹拌後、紫外線を3分間照射した(照射条件:照度3.0mW/cm2,光量500mJ/cm2)。
実施例1におけるポリマー(A)の替わりにポリエチレングリコールジアクリレート(インターロック構造を形成しない架橋体として使用)44mgを使用する以外、実施例1と同様にして刺激応答性高分子架橋体フィルム(厚さ:1.0mm,非延伸)を作製した。
実施例および比較例で得られた刺激応答性高分子架橋体フィルムを水に浸漬し、水温を昇温速度1℃/minで室温から50℃まで上昇させた。そのとき、各温度での刺激応答性高分子架橋体フィルムの質量を測定し、膨潤率を算出した。
膨潤率[%]={(Wswell−Wdry)/Wdry}×100
これにより得られた温度と膨潤率との関係を図3のグラフに示す。
実施例および比較例で得られた刺激応答性高分子架橋体フィルム(室温)を50℃の水に浸漬し、膨潤率S(t)を経時的に測定して、収縮率Snを算出した。
収縮率Sn=時間(t)での膨潤率S(t)/完全に膨潤した状態(23℃)での膨潤率S(max)
これにより得られた時間と収縮率Snとの関係(収縮挙動)を図4のグラフに示す。
実施例および比較例で得られた刺激応答性高分子架橋体フィルムの表面の純水に対する接触角を、23℃(室温)および60℃(加熱)にて、接触角計(KRUSS社製,DSA100)を用いて測定した。結果を表1に示す。
実施例および比較例で得られた刺激応答性高分子架橋体フィルムを23℃(室温)から60℃まで加熱し、そのときの刺激応答性高分子架橋体フィルムの外観を目視により評価した。その結果、実施例の刺激応答性高分子架橋体フィルムは、加熱によりフィルムが透明から白色に顕著に変化した。一方、比較例の刺激応答性高分子架橋体フィルムは、透明から薄く濁る程度(半透明)に変化した。実施例で得られた刺激応答性高分子架橋体フィルムの加熱前の状態(透明)を示す写真を図5に、加熱後の状態(白色)を示す写真を図6に示す。
Claims (5)
- 2個以上の環状部分を有するポリマーと、一方の末端に直鎖状分子を包接する環状部分が離脱しないようなブロック基を有し他方の末端に重合性官能基を有する直鎖状分子とを混合し、その全部又は一部について、前記環状部分の開口部を前記直鎖状分子で串刺し状に貫通したロタキサン構造の包接錯体を形成させ、
次いで、前記直鎖状分子の重合性官能基を介して、前記直鎖状分子と刺激応答性化合物とを共重合する刺激応答性高分子架橋体の製造方法であって、
前記ポリマーの環状部分は、α−シクロデキストリン、β−シクロデキストリンおよびγ−シクロデキストリンからなる群から選ばれる少なくとも1種、または環状ポリエーテル、環状ポリエステル、環状ポリエーテルアミンおよび環状ポリアミンからなる群から選ばれる少なくとも1種であり、
前記直鎖状分子の重合性官能基は、(メタ)アクリロイル基、ビニル基、エポキシ基、アセチレン基またはオキセタニル基であり、
前記刺激応答性化合物は、前記直鎖状分子の重合性官能基と重合可能な官能基を有するものである
ことを特徴とする刺激応答性高分子架橋体の製造方法。 - 2個以上の環状部分を有するポリマー、及び一方の末端に直鎖状分子を包接する環状部分が離脱しないようなブロック基を有し他方の末端に重合性官能基を有する、前記環状部分の開口部を直鎖状分子で串刺し状に貫通するロタキサン構造の包接錯体を前記ポリマーと形成可能な直鎖状分子を混合して得られた高分子架橋前駆体の前記直鎖状分子の重合性官能基を介して、前記直鎖状分子と刺激応答性化合物とを共重合させることにより得られる刺激応答性高分子架橋体であって、
前記ポリマーの環状部分は、α−シクロデキストリン、β−シクロデキストリンおよびγ−シクロデキストリンからなる群から選ばれる少なくとも1種、または環状ポリエーテル、環状ポリエステル、環状ポリエーテルアミンおよび環状ポリアミンからなる群から選ばれる少なくとも1種であり、
前記直鎖状分子の重合性官能基は、(メタ)アクリロイル基、ビニル基、エポキシ基、アセチレン基またはオキセタニル基であり、
前記刺激応答性化合物は、前記直鎖状分子の重合性官能基と重合可能な官能基を有するものである
ことを特徴とする刺激応答性高分子架橋体。 - 2個以上の環状部分を有するポリマーにおける前記環状部分の開口部に、側鎖末端に直鎖状分子を包接する環状部分が離脱しないようなブロック基を有する第1の高分子の少なくとも1つの側鎖が串刺し状に貫通し、かつ、同一の前記環状部分を有するポリマーの残り少なくとも1個の前記環状部分の開口部に、側鎖末端に直鎖状分子を包接する環状部分が離脱しないようなブロック基を有する第2の高分子の少なくとも1つの側鎖が串刺し状に貫通した構造を有し、
前記第1の高分子、前記第2の高分子、または前記第1の高分子と前記第2の高分子とを結合する部分の少なくとも1箇所に、刺激応答性化合物またはその残基が含まれた箇所を有する刺激応答性高分子架橋体であって、
前記ポリマーの環状部分は、α−シクロデキストリン、β−シクロデキストリンおよびγ−シクロデキストリンからなる群から選ばれる少なくとも1種、または環状ポリエーテル、環状ポリエステル、環状ポリエーテルアミンおよび環状ポリアミンからなる群から選ばれる少なくとも1種である
ことを特徴とする刺激応答性高分子架橋体。 - 重合体としての前記刺激応答性化合物が、前記第1の高分子および/または前記第2の高分子の主鎖を構成することを特徴とする請求項3に記載の刺激応答性高分子架橋体。
- 前記刺激応答性化合物が、N−イソプロピルアクリルアミドまたはその重合体であることを特徴とする請求項2〜4のいずれかに記載の刺激応答性高分子架橋体。
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JP5522891B2 (ja) * | 2007-08-29 | 2014-06-18 | リンテック株式会社 | 高分子架橋前駆体、高分子架橋体およびそれらの製造方法 |
JP5612311B2 (ja) * | 2007-11-27 | 2014-10-22 | アドバンスト・ソフトマテリアルズ株式会社 | ポリロタキサン又は架橋ポリロタキサン及び多成分分散媒体を含有する組成物 |
JP5683072B2 (ja) * | 2009-01-07 | 2015-03-11 | リンテック株式会社 | 熱応答性高分子ゲルフィルム |
JP5641695B2 (ja) * | 2009-01-07 | 2014-12-17 | リンテック株式会社 | 熱応答性高分子ゲルおよび熱応答性高分子ゲルフィルム |
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