JP6144103B2 - 合成繊維用サイジング剤、強化繊維束及び繊維強化複合材 - Google Patents
合成繊維用サイジング剤、強化繊維束及び繊維強化複合材 Download PDFInfo
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- JP6144103B2 JP6144103B2 JP2013096751A JP2013096751A JP6144103B2 JP 6144103 B2 JP6144103 B2 JP 6144103B2 JP 2013096751 A JP2013096751 A JP 2013096751A JP 2013096751 A JP2013096751 A JP 2013096751A JP 6144103 B2 JP6144103 B2 JP 6144103B2
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- Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Textile Engineering (AREA)
- Organic Chemistry (AREA)
- Treatments For Attaching Organic Compounds To Fibrous Goods (AREA)
- Chemical Treatment Of Fibers During Manufacturing Processes (AREA)
- Low-Molecular Organic Synthesis Reactions Using Catalysts (AREA)
- General Chemical & Material Sciences (AREA)
- Reinforced Plastic Materials (AREA)
- Manufacturing & Machinery (AREA)
- Materials Engineering (AREA)
- Health & Medical Sciences (AREA)
- Medicinal Chemistry (AREA)
- Polymers & Plastics (AREA)
Description
原料シリコーンとして、下記式で表されるメチルハイドロジェンシリコーンを用意した。
撹拌機、温度計、還流冷却機、窒素ガス導入管及び滴下ロートを備えた反応容器に原料シリコーン(63g)を入れ、窒素を気流し温度が65℃になるまで加熱しながら均一となるまで混合した。ヒドロシリル化触媒として、塩化白金(IV)のエチレングリコールモノブチルエーテル・トルエン混合溶液を、系内の反応物に対し白金濃度が5ppmとなるように添加した。反応物の温度が120℃となったところで、0.9モルのα−メチルスチレン(106.2g)を滴下し、120℃で1時間、反応させた。
原料シリコーンと反応させるビニル基を有する不飽和化合物を表1又は2のように替えたこと以外は実施例1と同様にして、オルガノ変性シリコーンを得た。また、得られたオルガノ変性シリコーンを用いたこと以外は実施例1と同様にして、サイジング剤及び強化炭素繊維束を得た。
原料シリコーンと反応させるビニル基を有する不飽和化合物を表2のように替えたこと以外は実施例1と同様にして、オルガノ変性シリコーンを得た。また、得られたオルガノ変性シリコーンを用いたこと以外は実施例1と同様にして、サイジング剤及び強化炭素繊維束を得た。
実施例1におけるオルガノ変性シリコーンに替えて、ビスフェノールA型エポキシ樹脂(製品名:jER828、三菱化学(株)社製、分子量約370、下記式で表される化合物)を用いたこと以外は実施例1と同様にして、サイジング剤及び強化炭素繊維束を得た。
実施例1におけるオルガノ変性シリコーンに替えて、フェノールノボラック型エポキシ樹脂(製品名:エポトートYDPN−638、新日鐵化学(株)社製)を用いたこと以外は実施例1と同様にして、サイジング剤及び強化炭素繊維束を得た。
実施例1におけるオルガノ変性シリコーンに替えて、エポキシ変性シリコーン(製品名:X−22−343、官能基当量:525g/mol、信越化学工業(株)社製)を用いたこと以外は実施例1と同様にして、サイジング剤及び強化炭素繊維束を得た。
エポキシ変性シリコーン(製品名:X−22−343、官能基当量:525g/mol、信越化学工業(株)社製)とアルキルアラルキル変性シリコーン(製品名:X−22−1877、信越化学工業(株)社製)とを質量比50:50で混合した。実施例1におけるオルガノ変性シリコーンに替えて、この混合物を用いたこと以外は実施例1と同様にして、サイジング剤及び強化炭素繊維束を得た。
サイジング剤を処理せずに炭素繊維束を用いた。
上記で得られた強化炭素繊維束について、集束性、接着性及び柔軟性を以下の方法で評価した。結果を表1〜表3に示す。
まず、長さ50cmの強化繊維束の上端を固定し、下端に50gの荷重を掛けて吊るした。次いで下端から約20cmの所を鋭利な鋏で切断し、吊るし残った方の強化繊維束の断面の最大径を測定した。最大径が小さい程、集束性が良好であることを示す。
強化繊維束とマトリックス樹脂との接着性について、単繊維埋め込み(フラグメンテーション)法により測定した界面剪断強度を用いて評価した。界面剪断強度が高いほど、接着性が優れることを示す。具体的には以下の手順により行った。
臨界繊維長(mm)=4×平均繊維長(mm)/3
界面剪断強度(MPa)=繊維引張り強度(MPa)×(繊維直径(mm)/2)×臨界繊維長(mm)
JIS L 1096(2010)のE法(ハンドルオメータ法)に用いられるハンドルオメータ(熊谷理機工業(株)社製)を用いて、強化繊維束を上から押圧した時の抵抗力を測定し、柔軟性を評価した。なお、測定は、スロット幅を20mmに設定し、長さ30cmの強化繊維束の中央に荷重をかけ、3回行った。それらの平均値を表に示す。数値が小さい程、柔軟であることを示す。
Claims (4)
- 下記一般式(1)で表されるオルガノ変性シリコーンを含む、合成繊維用サイジング剤。
[式(1)中、R1は、水素原子、メチル基又はエチル基を表し、R2は、下記一般式(2)で表される基を表し、R3は、芳香族環を有する炭素数8〜40の炭化水素基又は炭素数3〜22のアルキル基、R4は、R1、R2又はR3と同様の基を表し、R1、R2、R3又はR4が複数ある場合はそれぞれが同一であっても異なっていてもよく、xは0以上の整数を表し、y及びzはそれぞれ1以上の整数を表し、(x+y+z)は10〜200である。
{式(2)中、R5は、炭素数2〜6のアルキレン基を表し、AOは、炭素数2〜4のアルキレンオキシ基を表し、R6は、炭素数1〜6のアルキレン基を表し、eは、0〜4の整数を表し、fは、0又は1の整数を表し、Epは、下記式(3)又は下記式(4)で表される基を表す。
}] - 合成繊維束と、該合成繊維束に付着させた請求項1に記載の合成繊維用サイジング剤と、を有する、強化繊維束。
- 前記合成繊維束が炭素繊維束である、請求項2に記載の強化繊維束。
- マトリックス樹脂と、請求項2又は3に記載の強化繊維束と、を含む、繊維強化複合材。
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