Chain⁃extended modification of isotactic polybutene-1 and its supercritical CO2 foaming behavior

doi:10.19491/j.issn.1001-9278.2023.12.001

Abstract

Abstract:

Isotactic polybutene⁃1 （iPB⁃1） with a long⁃chain branching and cross⁃linking structure was prepared by using dicumyl peroxide as an initiator and zinc dimethyldithiocarbamate （ZDMC） and pentaerythritol triacrylate as dual monomers. Then， iPB⁃1 foams were prepared through supercritical CO₂ foaming. The effects of chain⁃extended modification on the melting， crystallization， rheological， and foaming behaviors of iPB⁃1 were investigated. The results indicated that the long⁃chain branching structure resulted in an increase in the crystallization temperature of iPB⁃1 but a decrease in its crystallinity. The modified iPB⁃1 obtained an improvement in the melt viscoelasticity and relaxation time， resulting in more remarkable shear thinning along with a significant strain⁃hardening phenomenon. The modified iPB⁃1 with a long⁃chain branching structure exhibited a wider foaming temperature window and a more uniform cellular structure.

Key words: isotactic polybutene?1, long chain branching, rheological property, supercritical carbon dioxide, foaming

CLC Number:

TQ325.1⁺5

GONG Zheng, LI Weijie, ZHAO Ling, HU Dongdong. Chain⁃extended modification of isotactic polybutene-1 and its supercritical CO₂ foaming behavior[J]. China Plastics, 2023, 37(12): 1-6.

Figures/Tables 9

样品	iPB⁃1/%	DCP/%	PETA/%	ZDMC/%	1010/%	熔体流动速率/g·（10 min）^-1	凝胶含量/%
PB	99.8	0	0	0	0.2	16.24	0
PB/0ZDMC	95.7	0.1	4	0	0.2	61.93	0
PB/2PETA	97.3	0.1	2	0.4	0.2	0.34	0
PB/4PETA	95.3	0.1	4	0.4	0.2	0.48	14
PB/6PETA	93.3	0.1	6	0.4	0.2	6.25	23

Tab.1. Formulations of modified iPB⁃1

Fig.1. Reaction mechanism of chain⁃extended modified iPB⁃1

Fig.2. Melt crystallization curves of different modified iPB⁃1

样品	T_mI/°C	ΔH_mI/J·g^-1	T_c/°C	χ_c/%
PB	135.1	80.93	75.9	57.40
PB/0ZDMC	131.1	76.63	86.8	54.35
PB/2PETA	135.5	58.76	87.2	41.67
PB/4PETA	139.1	73.74	93.3	52.30
PB/6PETA	134.3	79.68	90.2	56.51

Tab.2. DSC data of modified iPB⁃1

Fig.3. Elongational rheological behavior of different modified iPB⁃1

Fig.4. Cell morphologies of different modified iPB⁃1

Fig.5. Foaming behavior of different modified iPB⁃1

Fig.6. Shear rheological behavior of different modified iPB⁃1

Fig.7. （a） Han plots；（b） cole⁃cole plots；（c） vGP plots

References 16

1	LUCIANI L， SEPPALA J， LOFGREN B. Poly-1⁃butene： Its preparation， properties and challenges［J］. Progress in Polymer Science， 1988， 13（1）： 37⁃62.
2	XU Y， LIU T， LI L， et al. Controlling crystal phase transition from form Ⅱ to I in isotactic poly-1⁃butene using CO₂ ［J］. Polymer， 2012， 53（26）： 6 102⁃6 111.
3	FU P， LI J Q， JIANG S C. Role of chain dynamics in crystal transition of isotactic polybutene-1［J］. Polymer， 2020， 210： 123029.
4	XIN R， GUO Z X， LI Y P， et al. Morphological evidence for the two⁃step Ⅱ⁃I phase transition of isotactic polybutene-1［J］. Macromolecules， 2019， 52（19）： 7 175⁃7 182.
5	LIU L， CHU Z Z， LIAO Y L， et al. Flow⁃induced crystallization in butene-1/1，5⁃hexadiene copolymers： mutual effects of molecular factor and flow stimuli［J］. Macromolecules， 2020， 53（19）： 8 476⁃8 486.
6	XIN R， LI Y P， SHEN H R， et al. The Ⅱ to I phase transition of isotactic poly（1⁃butene） single crystals at an early stage［J］. Macromolecules， 2022， 55（18）： 8 203⁃8 209.
7	HU D D， LI W J， WU K W， et al. Utilization of supercritical CO₂ for controlling the crystal phase transition and cell morphology of isotactic polybutene-1 foams［J］. Journal of CO₂ Utilization， 2022， 66： 102265.
8	索倩倩，乔辉，张亚雄，等. 聚丁烯异相成核发泡行为的研究［J］. 中国塑料， 2016， 30（06）： 7⁃12.
	SUO Q Q， QIAO H， ZHANG Y H， et al. Study on heterogeneous foaming behavior of polybutylene［J］. China Plastics， 2016， 30（06）： 7⁃12.
9	HU D D， XUE K， LIU Z， et al. The essential role of PBS on PBAT foaming under supercritical CO₂ toward green engineering［J］. Journal of CO₂ Utilization， 2022， 60： 101965.
10	GAO X L， CHEN Y C， CHEN P， et al. Supercritical CO₂ foaming and shrinkage resistance of thermoplastic polyurethane/modified magnesium borate whisker composite［J］. Journal of CO₂ Utilization， 2022， 57： 101887.
11	WANG X Y， DIAO X Q， YANG N， et al. Chain extension and modification of polypropylene carbonate using diphenylmethane diisocyanate［J］. Polymer International， 2015， 64（10）： 1491⁃1496.
12	BRYSKIEWICZ A， ZIELENIEWSKA M， PRZYJEMSKA K， et al. Modification of flexible polyurethane foams by the addition of natural origin fillers［J］. Polymer Degradation and Stability， 2016， 132： 32⁃40.
13	HU X Y， LIU H F， GAO Z Y， et al. Blending modification of PHBV/PBS/PEG and its biodegradation［J］. Polymer⁃Plastics Technology and Engineering， 2017， 56（10）： 1 128⁃1 135.
14	WANG L， ISHIHARA S， ANDO M， et al. Fabrication of high expansion microcellular injection⁃molded polypropylene foams by adding long⁃chain branches［J］. Industrial and Engineering Chemistry Research， 2016， 55（46）： 11 970⁃11 982.
15	MCCALLUM T J， KONTOPOULOU M， PARK C B， et al. The rheological and physical properties of linear and branched polypropylene blends［J］. Polymer Engineering and Science， 2007， 47（7）： 1 133⁃1 140.
16	CHIEFARI J， CHONG Y K， ERCOLE F， et al. Living free⁃radical polymerization by reversible addition-fragmentation chain transfer： the RAFT process［J］. Macromolecules， 1998， 31（16）： 5 559⁃5 562.

[1]	JIAO Yang, WANG Longzhen, CAI Zhuorui, LIU Ronghao, ZHANG Yuxia, ZHOU Hongfu. Study on preparation and resilience of PBAT foams with high volume expansion ratio [J]. China Plastics, 2023, 37(9): 19-27.
[2]	SUN Yibo, LIU Yaning, LU Haofan, CHEN Shihong, WANG Xiangdong, WU Lili. Study on chain⁃extending reaction of PA66 and its supercritical CO₂ microcellular foaming behavior [J]. China Plastics, 2023, 37(12): 41-46.
[3]	FENG Yingjian, HU Dongdong, WEI Shaolong, QIAN Jun, XIONG Wei, YAO Shun, ZHAO Ling. Preparation of long⁃chain⁃branched poly（ethylene terephthalate） and its foaming properties by supercritical CO₂ extrusion [J]. China Plastics, 2023, 37(11): 1-9.
[4]	MIAO Dan, SONG Yuping, WANG Wenqian. Situation of China’s blow molding industry and tendency of key products， process and equipment during the period of “14th Five⁃Year Plan” [J]. China Plastics, 2022, 36(9): 57-62.
[5]	LI Juan, LI Ying, GUO Xiaolin, ZHANG Chen. Guidelines for the safety use of CO₂ foaming technology in the production of XPS foam industry in China [J]. China Plastics, 2022, 36(9): 160-166.
[6]	GUO Xiaolei, LUO Jingyun, DING Xin, WANG Yuchen, NIE Minghan, SONG Jiajie, ZHANG Yan’e, HU Jing. Study on modification and foaming behavior of PHBV through chain extension [J]. China Plastics, 2022, 36(8): 73-79.
[7]	LEI Yujie, CHEN Minghuan, WANG Jieyao, CHEN Wangzhi, LI Lei. Cross⁃linked foaming process and performance of recycled polyethylene [J]. China Plastics, 2022, 36(6): 124-129.
[8]	JI Feng, GONG Weihua, ZHANG Yan, LUO Shuiyuan, YU Qingyu, ZHU Junqiu, GUO Jiangbin. Preparation of biodegradable PBAT foaming particles by supercritical carbon dioxide autoclave foaming technology [J]. China Plastics, 2022, 36(5): 122-126.
[9]	SONG Renda, WU Gaojian, CHEN Junxiang, ZHANG Youchen, YANG Weimin, XIE Pengcheng. Preparation and its electromagnetic shielding performance of PP/PET/CNTs foaming composites [J]. China Plastics, 2022, 36(2): 1-7.
[10]	HENG Yue, XUE Nanxiang, CHEN Zhuangxin, LEI Caihong, XU Ruijie. Dynamic rheological behavior and compatibility of polyethylene/paraffin oil blends [J]. China Plastics, 2022, 36(2): 13-18.
[11]	LI Qiwei, WANG Cuicui, ZHENG Haijun, CHEN Jihe, WANG Ge, CHENG Haitao. Effects of multiple extrusions on mechanical and foaming properties of polypropylene/bamboo fiber composites [J]. China Plastics, 2022, 36(2): 56-60.
[12]	LI Wanlong, YANG Weimin, LAN Tianjie, LI Haoyi, DING Yumei, QIU Yonghong. Research progress in supercritical fluid application in plastic processing [J]. China Plastics, 2022, 36(11): 112-117.
[13]	YANG Jin, CHEN Pengran, GAO Peixin. Preparation and properties of lightweight and high⁃strength epoxy resin foams foamed at room temperature [J]. China Plastics, 2022, 36(10): 7-14.
[14]	QIAO Shize, GUO Menghao, HE Yadong, XIN Chunling. Solubility and diffusion behavior sof CO₂ in PPO and PS blends [J]. China Plastics, 2022, 36(10): 71-76.
[15]	WANG Xiaodong, HUA Lei, DONG Aijuan, LUO Lihua. Study on measurement method of gas evolution of foaming agent ADC based on thermogravimetric analysis [J]. China Plastics, 2022, 36(1): 142-147.

Chain⁃extended modification of isotactic polybutene-1 and its supercritical CO₂ foaming behavior

RichHTML

PDF

Knowledge

Abstract

Cite this article

share this article

Figures/Tables 9

References 16

Related Articles 15

Recommended Articles

Metrics

Comments