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中国塑料 ›› 2024, Vol. 38 ›› Issue (12): 123-129.DOI: 10.19491/j.issn.1001-9278.2024.12.019
收稿日期:
2024-03-06
出版日期:
2024-12-26
发布日期:
2024-12-25
作者简介:
王晨,女,工程师/本科,主要从事塑料助剂的研发和高分子材料的改性,995937882@qq.com
基金资助:
WANG Chen1(), LI Xiangyang2, ZHOU Li3
Received:
2024-03-06
Online:
2024-12-26
Published:
2024-12-25
摘要:
以均聚PP⁃700+为基体树脂,以2,6⁃苯二甲酸环己酰胺(TMB⁃5)为β晶成核剂,采用熔融共混法制备β晶改性聚丙烯。利用偏光显微镜、差示扫描量热仪、万能试验机、数位冲击试验机以及热变形温度测定仪分析了TMB⁃5对均聚聚丙烯应用性能及结晶行为的影响。结果表明,添加TMB⁃5成核剂后,诱导α晶型逐渐转变为β晶型,随着添加量的增加,PP⁃700+的β晶含量,结晶温度逐渐增大,结晶速率逐渐增快。当0.2 %的TMB⁃5添加到PP⁃700+基体中,β晶改性材料的β晶含量提高至84.9 %,拉伸强度提高4.5 %,弯曲模量与弯曲强度分别提高14.6 %和13 %,同时冲击强度未受到损失,悬臂梁冲击强度与简支梁冲击强度分别提高9.8 %和5.9 %,热变形温度提高了42.13 ℃。
中图分类号:
王晨, 李向阳, 周丽. 芳基二酰胺成核剂对均聚聚丙烯应用性能及结晶行为的影响[J]. 中国塑料, 2024, 38(12): 123-129.
WANG Chen, LI Xiangyang, ZHOU Li. Effect of aryl diamide on application performance and crystallization behavior of homopolymerization⁃type polypropylene[J]. China Plastics, 2024, 38(12): 123-129.
样品 编号 | α熔融 峰温/℃ | β熔融 峰温/℃ | α熔融 热焓/J/g | β熔融 热焓/J/g | β晶 含量/% |
---|---|---|---|---|---|
a | 161.90 | 147.96 | 111.56 | 36.42 | 33.3 |
b | 163.14 | 150.06 | 27.65 | 94.56 | 77.4 |
c | 163.79 | 151.32 | 22.72 | 98.90 | 81.3 |
d | 164.35 | 151.69 | 19.04 | 97.26 | 83.6 |
e | 164.58 | 151.87 | 20.83 | 102.33 | 83.1 |
f | 165.81 | 152.10 | 17.94 | 100.84 | 84.9 |
g | 165.62 | 152.60 | 16.96 | 99.44 | 85.4 |
h | 165.80 | 152.65 | 18.04 | 99.67 | 84.7 |
样品 编号 | α熔融 峰温/℃ | β熔融 峰温/℃ | α熔融 热焓/J/g | β熔融 热焓/J/g | β晶 含量/% |
---|---|---|---|---|---|
a | 161.90 | 147.96 | 111.56 | 36.42 | 33.3 |
b | 163.14 | 150.06 | 27.65 | 94.56 | 77.4 |
c | 163.79 | 151.32 | 22.72 | 98.90 | 81.3 |
d | 164.35 | 151.69 | 19.04 | 97.26 | 83.6 |
e | 164.58 | 151.87 | 20.83 | 102.33 | 83.1 |
f | 165.81 | 152.10 | 17.94 | 100.84 | 84.9 |
g | 165.62 | 152.60 | 16.96 | 99.44 | 85.4 |
h | 165.80 | 152.65 | 18.04 | 99.67 | 84.7 |
样品 | 结晶峰温/℃ | 结晶热焓/J•g-1 | 半晶时间(138 ℃)/s |
---|---|---|---|
a | 118.02 | 118.21 | 无峰 |
b | 123.77 | 121.56 | 454 |
c | 124.93 | 118.55 | 376 |
d | 125.86 | 115.66 | 248 |
e | 126.65 | 119.37 | 220 |
f | 127.52 | 117.03 | 184 |
g | 128.03 | 113.17 | 160 |
h | 130.00 | 114.29 | 82 |
样品 | 结晶峰温/℃ | 结晶热焓/J•g-1 | 半晶时间(138 ℃)/s |
---|---|---|---|
a | 118.02 | 118.21 | 无峰 |
b | 123.77 | 121.56 | 454 |
c | 124.93 | 118.55 | 376 |
d | 125.86 | 115.66 | 248 |
e | 126.65 | 119.37 | 220 |
f | 127.52 | 117.03 | 184 |
g | 128.03 | 113.17 | 160 |
h | 130.00 | 114.29 | 82 |
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