ISBN : 978-602-17761-4-8
17
Proceedings of 2
nd
REPTech Crowne Plaza Hotel, Bandung, November 15-17, 2016
© 2016 Published by Center for Pulp and Paper through 2
nd
REPTech
The increasing of tensile strength after carboxymethylation process caused by the increase of the hydrogen bond and Van der walls bond, that affecting to shrinkage of fabric dimensional. , consequently
pick of fabric density warp density and weft density will be increased [2, 12]. On the use of sodium chloracetate, the longer of batching time tensile strength tends decreased.
This is because the use of sodium chloracetate which is an acid salt, cellulose can be damaged by acid is forming hydrocellulose and will be produced a shorter molecular chain. The outbreak of some
glucosidal bond between units, will cause hydrolysis of cellulose, reduced unit of glucose in the chain of cellulose can occur tensile strength decrease.
The sodium hydroxide is a strong alkaline, the erosion of polyester fabric turns out that the tensile strength decline and loosed the weight. At the pore where the hydrolysis happen, the polymeric molecules
are not compact, molecular bonds weakened so that the tensile strength of the fabric will decreases [3],
4. Polyester Weight Reduction
The results of weight reduction polyester can be seen in Table 3.The test results shown that the use greater concentration of sodium hydroxide and the longer batching time to a certain extent occurs that
weight reduction increases. The greater concentration of sodium chloracetate usage in a certain extent, the weight reduction polyester reduced, because sodium chloracetate will inhibit erosion of polyester
ibers by sodium hydroxide [3, 4]. From the analysis of variance turns out that the concentration of sodium hydroxide, sodium chloroacetate concentration, and batching time effected on the test results of
weight reduction Table 2. Tensile Strength of Warp
and Weft Direction Fabric Kg Batching
hours Sodium
Hydroxide N
Sodium Chloracetate N Warp Direction kg
Weft Direction kg 2
3 4
2 3
4 2
6 20.50
21.41 20.20
15.17 17.25
16.75 8
23.00 25.00
22.33 17.16
17.90 17.32
10 20.91
22.75 17.83
17.00 17.70
14.25 12
19.50 21.42
16.66 16.00
17.66 13.58
4 6
20.00 20.86
19.80 15.00
16.17 16.00
8 21.30
22.00 21.75
17.08 17.75
16.92 10
18.60 20.95
15.50 16.40
16.75 14.24
12 17.56
19.55 15.50
15.07 16.00
13.15 6
6 19.83
20.00 19.50
14.75 14.87
14.25 8
20.66 21.83
20.20 16.75
16.91 16.80
10 18.00
19.44 14.41
16.25 16.50
14.00 12
16.60 19.40
13.64 13.47
15.50 13.00
8 6
19.00 19.75
19.10 13.50
14.67 13.30
8 20.21
21.75 20.00
16.50 16.50
16.05 10
17.25 19.06
13.64 15.00
16.32 13.18
12 16.14
18.00 13.00
13.00 15.42
12.83 10
6 17.17
19.30 18.50
13.42 14.33
12.95 8
20.17 20.25
18.86 16.41
16.10 15.55
10 17.00
18.75 11.66
14.50 16.00
12.14 12
14.87 17.93
11.66 12.00
15.00 11.25
Raw material 21.15
17,20
ISBN : 978-602-17761-4-8
18
Proceedings of 2
nd
REPTech Crowne Plaza Hotel, Bandung, November 15-17, 2016
© 2016 Published by Center for Pulp and Paper through 2
nd
REPTech
Table 3. Polyester Weight Reduction
Batching Hours
Sodium Hydroxide N
Sodium Chloracetate N 2
3 4
2 6
7,4 4,6
4,3 8
8,4 7,5
4,6 10
8,9 8,7
8,4 12
9,2 9,0
8,7 4
6 8,6
7,9 3,9
8 8,7
7,9 8,1
10 9,3
9,0 9,4
12 10,2
9,4 9,4
6 6
8,9 8,2
7,3 8
9,5 9,4
9,0 10
11,2 10,0
10,2 12
11,9 10,9
10,6 8
6 8,9
8,4 7,5
8 10,9
9,7 9,7
10 14,4
10,2 10,9
12 14,7
11,4 11,2
10 6
9,9 10,3
8,5 8
13,8 10,8
10,3 10
15,9 13,8
11,1 12
16,2 14,2
11,7 Raw material
0,00
The magnitude of weight reduction depends on the duration of batching, abrasion hydrolysis the iber surface by sodium hydroxide, the dissolution process leading to the iber core, the longer of
batching time, the greater of polyester erosion, so that the content of the polyester is reduced. The greater of sodium hydroxide concentration, then the bond molecular chains breaking are accompanied
by dissolution in the greater part of the iber surface, resulting in the iber cross section of the smaller thinner so that the handle would be a softer fabric. Sodium chloroacetate is an acidic salt; polyester has
a good resistance to acids. The impregnation polyester fabric in sodium chloroacetate will inhibited the erosion process caused by the sodium hydroxide. As a result, the higher the of sodium chloracetate used
the erosion will be reduce. .The test results shown that the smallest weight reduction of the polyester obtained at combination treatment 4N sodium chloracetate, 6N sodium hydroxide and batching time
of 2 hours which is 4.3 reducing weight, while the largest weight reduction of the polyester at the combined treatment of 2N sodium chloroacetate, 12N sodium hydroxide and 10 hours batching time
is equal to 16.2 reducing weight. This is happen because the resulting of smaller reducing weight of fabric, carboxymethylation processed with the solution of 4N sodium chloroasetat further with 6
N sodium hydroxide 6N, this fabric has a pH of atmospheric more acidic when compared with the combination of 2N sodium chloracetate and 12 N sodium hydroxide, more acidic atmosphere prevents
an erosion, because the polyester iber is resistant to acids. So that, the weight reduction is becomes smaller. As comparison, it has also been demonstrated in previous studies [1] at Polyester Cellulose
Carboxymethylation process using Pad Bake methods is the smallest weight reduction of polyester was achieved in the use of 4N sodium chloracetate, 6 N sodium hydroxide and 120
o
C temperature process.
ISBN : 978-602-17761-4-8
19
Proceedings of 2
nd
REPTech Crowne Plaza Hotel, Bandung, November 15-17, 2016
© 2016 Published by Center for Pulp and Paper through 2
nd
REPTech
5. Moisture Regains
