广东费飘职业故本学院 Guangdong Inatitute of Textile Technology Chapter 15 Acetate and Triacetate fibers
Chapter 15 Acetate and Triacetate Fibers
广东费飘职业故本学院 Guangdong Inatitute of Textile Technology Introduction a Fibers in which forming substance is cellulose acetate where not less than 929/ of hydroxyl groups are acetylated replacing-OH groups with -COCH3 D Acetate: 2 of 3-OH groups in each 6 member ring are acetylated; N2.5 a Triacetate: Nearly all -oh groups are replaced 2.91N296 a Major use: lining fabrics for suits coats draperies
Introduction Fibers in which forming substance is cellulose acetate where not less than 92% of hydroxyl groups are acetylated: replacing -OH groups with -COCH3 . Acetate: 2 of 3 -OH groups in each 6- member ring are acetylated; ~2.5 Triacetate: Nearly all -OH groups are replaced 2.91~2.96 Major use: lining fabrics for suits, coats, draperies
广东费飘职业故本学院 Guangdong Inatitute of Textile Technology Structures 口 Surface: straited d Cross-section: obed 口Skin- core structure 口DP:250-300 a Much less H-bond than in rayon
Structures Surface: straited Cross-section: lobed Skin-core structure DP: 250-300 Much less H-bond than in rayon
广东费飘职业故本学院 Guangdong Inatitute of Textile Technology Properties a Acetate: hydrophilic, thermoplastic a Triacetate: hydrophobic higher melting and softening temperature high crystallinity a Wrinkle easily in hot water: dry cleaning only a Swells in water, mechanical properties change in water d Resist to weak alkali and acids 口 Can be b| eached
Properties Acetate: hydrophilic, thermoplastic Triacetate: hydrophobic, higher melting and softening temperature, high crystallinity Wrinkle easily in hot water: dry cleaning only Swells in water, mechanical properties change in water Resist to weak alkali and acids Can be bleached
广东费飘职业故本学院 Guangdong Inatitute of Textile Technology Properties 口So|ub| e in acetone a Degrade in uv light a Burns, melts forms black beads with vinegar like odder
Properties Soluble in acetone Degrade in UV light Burns, melts, forms black beads with vinegar like odder
广东费飘职业故本学院 Guangdong Inatitute of Textile Technology Production a Similar to cellulose rayon for the first a few steps a Cellulose mixed with acetic acid and acetic anhydride a sulfuric acid catalyst is added d acetylation takes place a degradation of the polymer ma king dP low a triacetate is made first a when water added, some acetyl
Production Similar to cellulose rayon for the first a few steps Cellulose mixed with acetic acid and acetic anhydride, a sulfuric acid catalyst is added acetylation takes place degradation of the polymer making DP low triacetate is made first when water added, some acetyl groups are removed
广东费飘职业故本学院 Guangdong Inatitute of Textile Technology Grades for test 1 number o students 20 6 1生 6 0910192030405060708090 29394959697989100
Grades for test 1
广东费飘职业故本学院 Guangdong Inatitute of Textile Technology Chapter 16 Nylon Fibers
Chapter 16 Nylon Fibers
广东费飘职业故本学院 Guangdong Inatitute of Textile Technology Introduction D Nylon man-made fibers in which fiber forming substance is any long-chain synthetic polyamide in which less than 85% of the amide linkages are attached to 2 aromatic rings D Invented in 1938 in du pont Q Largest market: carpet fiber 80% of market a 14% industrial and consumer products: tire cord fabrics and ropes 日11% apparel
Introduction Nylon: man-made fibers in which fiber forming substance is any long-chain synthetic polyamide in which less than 85% of the amide linkages are attached to 2 aromatic rings Invented in 1938 in Du Pont Largest market: carpet fiber 80% of market 14% industrial and consumer products: tire cord, fabrics and ropes 11% apparel
广东费飘职业故本学院 Guangdong Inatitute of Textile Technology Introduction 一口 Types Mostly: Nylon 6 and nylon 6,6 Small amount; nylon 3 nylon 4, nylon 5, nylon 7, nylon 8 nylon 12, nylon 4, 6, nylon 6, 10
Introduction Types: ◼ Mostly: Nylon 6 and Nylon 6,6 ◼ Small amount: nylon 3, nylon 4, nylon 5, nylon 7, nylon 8, nylon 12, nylon 4,6, nylon 6,10