高强度茂金属聚乙烯树脂吹膜加工性能影响研究

doi:10.19491/j.issn.1001-9278.2020.11.002

中国塑料 ›› 2020, Vol. 34 ›› Issue (11): 6-11.DOI: 10.19491/j.issn.1001-9278.2020.11.002

高强度茂金属聚乙烯树脂吹膜加工性能影响研究

杨帆¹^,², 朱军¹^,², 关莉¹^,², 张宝林¹^,²

^1.中国石油独山子石化分公司研究院，新疆独山子833699
^2.新疆橡塑材料实验室，新疆独山子833699

收稿日期:2020-05-08 出版日期:2020-11-26 发布日期:2020-11-20

Study on Influence of Film Blowing Processing Performance of High Strength Metallocene Polyethylene Resin

YANG Fan¹^,², ZHU Jun¹^,²,GUAN Li¹^,², ZHANG Baolin¹^,²

^1.Research Institute of Dushanzi Petrochemical Co，Dushanzi 833699，China
^2.Xinjiang Uygur Autonomous Region Key Laboratory of Rubber and Plastic Materials，Dushanzi 833699，China

Received:2020-05-08 Online:2020-11-26 Published:2020-11-20
Contact: YANG Fan E-mail:yjy_yf@petrochina.com.cn

摘要/Abstract

摘要：

HPR1018HA是一种极具代表性的高强度茂金属聚乙烯（PE-mLLD）薄膜专用树脂。本文探究了HPR1018HA在加工时不同加工参数对薄膜性能的影响。结果表明，随着加工温度的升高，HPR1018HA的落镖冲击性能显著改善；随着吹胀比的提升，HPR1018HA的落镖冲击性能显著提升。同时探究了HPR1018HA与常见的低密度聚乙烯（PE-LD）、线性低密度聚乙烯（PE-LLD）进行共混使用时薄膜性能变化的趋势。结果表明，当HPR1018HA与熔体流动速率为0.3 g/10 min的PE?LD进行共混时，当PE-LD的含量低于50 %时，薄膜的拉伸强度下降18 %左右，直角撕裂强度的变化率小于5 %；当HPR1018HA与熔体流动速率为2.0 g/10 min的PE-LD进行共混时，薄膜的拉伸强度整体下降约为40 %。当HPR1018HA与熔体流动速率为1.0 g/10 min的PE-LLD进行共混时，随着PE-LLD含量的增加，力学性能整体出现较为明显的下降，直角撕裂强度出现了明显上升。

关键词: 高强度茂金属聚乙烯, 加工窗口, 掺混加工

Abstract:

HPR1018HA polyethylene （PE） is a type of representative high-strength metallocene PE resin special for film blowing， and it has found widely applications under a huge market capacity. HPR1018HA PE is mainly processed by blow molding. In this paper， the effect of different processing parameters on the physical properties was investigated for the films processed by use of HPR1018HA PE. The results indicated that the dart impact performance of HPR1018HA PE was significantly improved with an increase of processing temperature， and the dart impact performance of HPR1018HA PE was significantly improved with an increase of inflation ratio. Meanwhile， the variation trend of physical properties was investigated for the films processed using the blended resins of HPR1018HA PE with PE-LD and PE-LLD. The results indicated that when HPR1018HA PE was blended with less than 50 wt% of PE-LD with a melt index of 0.3 g/10 min， the tensile strength of the films decreased by about 18 %， and the variation rate of their right-angle tear strength was less than 5%. When HPR1018HA PE was blended with PE-LD with a melt flow index of 2.0 g/10 min， the tensile strength of the films decreased by about 40 %. When HPR1018HA PE was blended with PE-LLD with a melt flow index of 1.0 g/10 min， the overall mechanical properties of the films decreased significantly with the increase of PE-LLD content， and their right-angle tear strength increased significantly.

Key words: high strength metallocene polyethylene, processing window, compounding

中图分类号:

TQ352.1⁺2

杨帆, 朱军, 关莉, 张宝林. 高强度茂金属聚乙烯树脂吹膜加工性能影响研究[J]. 中国塑料, 2020, 34(11): 6-11.

YANG Fan, ZHU Jun, GUAN Li, ZHANG Baolin. Study on Influence of Film Blowing Processing Performance of High Strength Metallocene Polyethylene Resin[J]. China Plastics, 2020, 34(11): 6-11.

图/表 11

样品编号	吹胀比	筒体温度/℃	主机转速/r·min^-1
1?1	1.5	210	25
1?2	2	210	25
1?3	2.5	210	25
1?4	3	210	25
1?5	2.5	190	25
1?6	2.5	200	25
1?7	2.5	220	25
1?8	2.5	230	25
1?9	2.5	210	15
1?10	2.5	210	20
1?11	2.5	210	30
1?12	2.5	210	40

表1 HPR1018HA加工窗口研究实验方案

Tab.1 Experiment scheme of processing for HPR1018HA

样品编号	掺混原料	HPR1018HA含量/%	掺混原料含量/%
2?1	LL0209AA	80	20
2?2	LL0209AA	60	40
2?3	LL0209AA	40	60
2?4	LL0209AA	20	80
2?5	1810D	80	20
2?6	1810D	60	40
2?7	1810D	40	60
2?8	1810D	20	80
2?9	2426H	80	20
2?10	2426H	60	40
2?11	2426H	40	60
2?12	2426H	20	80

表2 HPR1018HA掺混加工实验方案

Tab.2 Experiment scheme of HPR1018HA compounding

牌号	共聚单体种类	共聚单体含量/%	共聚单体支化点/ （10 000C）^-1
HPR1018HA	己烯	2.07	99.3
LL0209AA	丁烯	3.51	181.3
1810D	样品分子链结构比较复杂，明显可见多种支链结构，可能含有乙基、丁基、戊基、己基及以上结构，还可能含有更复杂的支链;分析主要支链含量：乙基5.5/10 000C、丁基58.9/10 000C、戊基30.3/10 000C、己基及以上36.3/10 000C
2426H

表3 各原料的13C?NMR测试结果

Tab.3 13C?NMR test of each raw material

牌号	数均相对分子质量/×10⁴	重均相对分子质量/×10⁴	Z均相对分子质量/×10⁵	相对分子质量分布
HPR1018HA	6.03	12.8	2.24	2.1
LL0209AA	3.96	12.7	3.01	3.2
1810D	1.26	6.63	1.83	5.3
2426H	2.37	8.86	1.87	3.7

表4 样品的相对分子质量及其分布

Tab.4 The relative molecular weight and its distribution of the samples

图1 加工温度对HPR1018HA力学性能的影响

Fig.1 Effect of processing temperature on mechanical properties of HPR1018HA

图2 吹胀比对HPR1018HA拉伸强度的影响

Fig.2 Effect of blowing of ratio on mechanical properties of HPR1018HA

图3 LL0209AA加入对薄膜力学性能的影响

Fig.3 Effect of addition of LL0209AA on mechanical properties of the films

图4 1810D加入对薄膜力学性能的影响

Fig.4 Effect of addition of 1810D on mechanical properties of the films

图5 2426H加入对薄膜力学性能的影响

Fig.5 Effect of addition of 2426H on mechanical properties of the films

图6 各牌号树脂含量对落镖冲击强度的影响

Fig.6 The influence of the loading of various resin on the impact strength of darts of the films

图7 各牌号树脂含量对雾度的影响

Fig.7 The influence of the loading of different grades of resins on the haze of the films

参考文献 5

1	唐岩，李延亮，王群涛，等.茂金属催化剂及茂金属聚乙烯现状［J］.合成树脂及塑料， 2014，31（2）：76⁃80.
	TANG Y， LI Y L， WANG Q T， et al. Status of Metallocene Catalyst and Its Polyethylene Products ［J］. China Synthetic Resin and Plastics， 2014， 31（2）： 76⁃80.
2	仲伟霞. 茂金属聚乙烯的结构与性能研究［D］.北京：北京化工大学，2001.
3	曾继军，李育英，何嘉松.茂金属聚乙烯的流变性与加工性［J］.高分子学报， 2000（1）： 69⁃72.
	ZENG J J， LI Y Y， HE J S. Rheology and Processability of Metallocene Polyethylene［J］. Acta Polymerica Sinica，2000（1）：69⁃72.
4	赵晓东，马沛岚. 茂金属线型低密度聚乙烯的加工性能［J］.石化技术与应用， 2006：24（1）：5⁃9.
	ZHAO X D， MA P L. Processability of mLLDPE［J］. Petrochemical Technology＆Application， 2006：24（1）：5⁃9.
5	刘卫东，白鸿. 茂金属聚乙烯产品表征、膜性能及应用［J］.当代化工，2014， 43（6）：904⁃906.
	LIU W D， BAI H. Characterization， Film Property and Application of Metallocene Polyethylene Products［J］. Contemporary Chemical Industry， 2014， 43（6）： 904⁃906.

高强度茂金属聚乙烯树脂吹膜加工性能影响研究

Study on Influence of Film Blowing Processing Performance of High Strength Metallocene Polyethylene Resin

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