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. 2019 Jun 22;11(6):1078. doi: 10.3390/polym11061078

Table 2.

Nonisothermal crystallization parameters as a function of cooling rate for polypropylene with unmodified and acetylated bamboo fibers.

Cooling Rate
(°C/min)
BPCs To (°C ) Tp (°C ) Xc (%) t1/2 (min)
2.5 BPC0 127.2 ± 0.0 a 124.3 ± 0.1 a 67 ± 8 a 2.31 ± 0.23 b
BPC2 127.2 ± 0.2 a 123.1 ± 0.7 a 56 ± 15 a 2.81 ± 0.11 ab
BPC6 126.0 ± 0.2 a 122.5 ± 0.1 a 67 ± 5 a 2.91 ± 0.11 ab
BPC9 125.8 ± 0.0 ab 122.4 ± 0.1 ab 64 ± 9 a 2.71 ± 0.16 ab
BPC13 125.6 ± 0.3 ab 122.5 ± 0.3 ab 64 ± 4 a 2.63 ± 0.16 ab
BPC19 124.3 ± 0.1 b 120.8 ± 0.2 b 60 ± 11 a 3.17 ± 0.34 a
5 BPC0 126.5 ± 1.7 a 122.4 ± 1.4 a 63 ± 9 a 1.57 ± 0.10 ab
BPC2 125.9 ± 1.2 a 121.7 ± 1.2 a 53 ± 8 a 1.61 ± 0.02 a
BPC6 124.6 ± 1.1 a 120.3 ± 1.0 a 67 ± 3 a 1.57 ± 0.04 a
BPC9 123.8 ± 0.6 ab 119.9 ± 0.4 ab 59 ± 9 a 1.41 ± 0.02 b
BPC13 123.7 ± 0.8 ab 120.0 ± 0.7 ab 57 ± 2 a 1.39 ± 0.01 b
BPC19 121.5 ± 0.2 b 117.6 ± 0.2 b 60 ± 5 a 1.57 ± 0.05 ab
10 BPC0 122.1 ± 0.5 a 117.6 ± 0.7 a 64 ± 10 a 0.82 ± 0.01 a
BPC2 122.4 ± 0.4 a 117.4 ± 0.4 a 66 ± 9 a 0.91 ± 0.01 a
BPC6 122.1 ± 0.8 a 116.9 ± 0.7 a 62 ± 8 a 0.90 ± 0.02 a
BPC9 120.7 ± 0.9 a 116.0 ± 0.7 a 63 ± 6 a 0.81 ± 0.06 a
BPC13 120.9 ± 0.3 a 116.5 ± 0.4 a 64 ± 9 a 0.84 ± 0.09 a
BPC19 118.1 ± 0.2 b 113.7 ± 0.3 b 60 ± 5 a 0.96 ± 0.04 a
15 BPC0 121.9 ± 1.7 a 116.2 ± 1.3 a 70 ± 7 a 0.65 ± 0.03 a
BPC2 120.3 ± 0.1 ab 115.1 ± 0.2 ab 45 ± 18 a 0.58 ± 0.05 a
BPC6 119.5 ± 1.0 ab 113.3 ± 0.8 bc 57 ± 4 a 0.66 ± 0.02 a
BPC9 118.4 ± 0.7 bc 113.1 ± 0.8 bc 59 ± 14 a 0.63 ± 0.06 a
BPC13 118.3 ± 0.2 bc 113.3 ± 0.1 bc 57 ± 1 a 0.58 ± 0.05 a
BPC19 115.8 ± 0.3 c 111.1 ± 0.3 c 49 ± 5 a 0.60 ± 0.04 a
20 BPC0 118.7 ± 0.5 a 112.8 ± 0.9 a 59 ± 3 a 0.48 ± 0.04 a
BPC2 118.3 ± 0.4 ab 111.9 ± 0.9 a 60 ± 3 a 0.53 ± 0.04 a
BPC6 118.1 ± 0.3 ab 111.4 ± 0.2 ab 61 ± 7 a 0.53 ± 0.02 a
BPC9 116.7 ± 0.6 ab 111.2 ± 0.6 ab 56 ± 5 a 0.47 ± 0.04 a
BPC13 116.6 ± 0.4 b 111.0 ± 0.3 ab 59 ± 12 a 0.46 ± 0.01 a
BPC19 114.0 ± 0.3 c 108.9 ± 0.8 b 50 ± 14 a 0.48 ± 0.03 a
25 BPC0 117.3 ± 0.3 a 111.0 ± 0.5 a 69 ± 10 a 0.41 ± 0.01 a
BPC2 117.5 ± 0.6 a 110.8 ± 0.5 a 56 ± 9 a 0.42 ± 0.00 a
BPC6 116.6 ± 1.8 a 109.9 ± 1.6 ab 62 ± 6 a 0.44 ± 0.03 a
BPC9 115.4 ± 0.2 a 109.6 ± 0.2 a 51 ± 18 a 0.38 ± 0.05 a
BPC13 115.5 ± 0.2 a 109.6 ± 0.3 a 64 ± 1 a 0.39 ± 0.01 a
BPC19 112.5 ± 0.3 b 107.3 ± 0.3 b 56 ± 1 a 0.38 ± 0.01 a

Values are the mean ± SD (n = 3). Different superscript letters (a, b, and c) within a given cooling rate indicate a significant difference (p < 0.05).