Synthesis of Poly(Urethane-Urea)s from Polycarbonate Macrodiols and IPDI with the Addition of Derivant of Propylene Carbonate

2012 ◽  
Vol 499 ◽  
pp. 104-107 ◽  
Author(s):  
Jing Xin Zhu ◽  
Yan Long Ma ◽  
Yao Dong Zhang
Keyword(s):  
Mechanical Properties ◽  
Molecular Mass ◽  
Propylene Carbonate ◽  
Chain Extender ◽  
Biomedical Material ◽  
Aliphatic Polycarbonate

In this paper, poly(urethane-urea)s were synthesized from two aliphatic polycarbonate macrodiols with different molecular mass, isophoronodiisocyanate (IPDI) and a pseudo-chain extender, a derivant of propylene carbonate, which was synthesized by propylene carbonate and 1,6-diaminohexane. The obtained poly(urethane-urea) elastomers exhibit very good mechanical properties, they are colorless and transparent and could be applied in biomedical material field.

Enhanced properties of the poly(propylene carbonate)/poly(butylene succinate) composites with chain extender

2018 ◽  
Vol 32 (8) ◽  
pp. 1068-1077 ◽  
Author(s):  
Jing Sun ◽  
Liangqiang Wei ◽  
Shanshan Luo ◽  
Anrong Huang ◽  
Min Shi
Keyword(s):  
Mechanical Properties ◽  
Thermal Decomposition ◽  
Tensile Strength ◽  
Propylene Carbonate ◽  
Mechanical Analysis ◽  
Chain Extender ◽  
Melt Mixing ◽  
Butylene Succinate ◽  
Enhanced Properties ◽  
Poly Propylene

Poly(propylene carbonate) (PPC) blended with poly(butylene succinate) (PBS) with chain extender (CE) was prepared by melt mixing. Mechanical properties of PPC/PBS composites showed that the addition of CE can increase its tensile strength and unnotched impact strength, and the PPC/PBS composites had higher tensile strength when CE (0.4 wt%) was added into PPC/PBS composites. Thermogravimetric measurements revealed that adding CE to PPC/PBS (70/30 wt%) can improve the thermal decomposition temperatures ( T −5% and T −10%). Dynamic mechanical analysis revealed that the incorporation of CE increased the storage modulus of the PPC/PBS (70/30 wt%) composites.

Preparation and characterization of poly(propylene carbonate)/polystyrene composite films by melt-extrusion method

e-Polymers ◽  
2010 ◽  
Vol 10 (1) ◽  
Author(s):  
Liu Huihong ◽  
Pan Lisha ◽  
Lin Qiang ◽  
Xu Nai ◽  
Lu Lingbin ◽  
...  
Keyword(s):  
Mechanical Properties ◽  
Thermal Stability ◽  
Propylene Carbonate ◽  
Composite Films ◽  
Extrusion Process ◽  
Melt Extrusion ◽  
Aliphatic Polycarbonate ◽  
Wide Range ◽  
Poly Propylene ◽  
Extrusion Technology

AbstractPoly(propylene carbonate) (PPC) is a new biodegradable aliphatic polycarbonate with poor thermal stability and mechanical properties which shows difficulty in forming film by melt-extrusion technology. Through the addition of polystyrene (PS), the melt-extrusion film processability, thermal stability and mechanical properties of PPC was improved largely. PPC/PS films were prepared in the the melt-extrusion process successfully. DSC data showed that there was some degree of miscibility between PPC and PS. SEM showed good dispersion of PS particles into PPC matrix. Improved mechanical properties and thermal stability of PPC/PS blends were attributed to homogeneous dispersing and stronger interfacial interaction of PS and PPC. These results indicate that blending PPC with PS is an efficient and convenient method to improve the properties of PPC, and the composites can be used as a common packaging material for a wide range of applications.

Preparation and Characterization of Poly(propylene carbonate)/Alkali Lignin Composite Sheets by Calendering Process

2011 ◽  
Vol 233-235 ◽  
pp. 1786-1789 ◽  
Author(s):  
Li Sha Pan ◽  
Nai Xu ◽  
Zheng Tian ◽  
Ling Bin Lu ◽  
Su Juan Pang ◽  
...  
Keyword(s):  
Mechanical Properties ◽  
Thermal Stability ◽  
Propylene Carbonate ◽  
Convenient Method ◽  
Interfacial Interaction ◽  
Alkali Lignin ◽  
Aliphatic Polycarbonate ◽  
Poly Propylene ◽  
Thermal Stability Of

PPC is a new biodegradable aliphatic polycarbonate with poor thermal stability and mechanical properties which is difficult to form sheets or films and so on. Through the addition of alkali lignin, thermal stability and mechanical properties of PPC was improved largely. PPC/ alkali lignin sheets could be prepared. DSC results showed that the thermal stability of PPC was improved by the introduction of alkali lignin. SEM showed good dispersion of alkali lignin particles into PPC matrix that resulted in good miscibility. Improved mechanical properties and thermal stability of PPC/ alkali lignin blends were attributed to stronger interfacial interaction of PPC and alkali lignin. These results indicate that blending PPC with alkali lignin is an efficient and convenient method to improve the properties of PPC.

Novel Polyaspartic Ester Polyureas Based on Flexible Polyaspartic Ester

2011 ◽  
Vol 197-198 ◽  
pp. 1294-1298
Author(s):  
Ping Lu ◽  
Wei Bo Huang ◽  
Xue Qiang Ma ◽  
Xu Dong Liu
Keyword(s):  
Mechanical Properties ◽  
Molecular Weight ◽  
Hydrogen Bonding ◽  
Molecular Weight Distribution ◽  
Michael Addition ◽  
Weight Distribution ◽  
Addition Reaction ◽  
Chain Extender ◽  
Michael Addition Reaction ◽  
Ft Ir

New polyaspartic ester (PAE) chain extender named PAE-f was prepared via two steps of Michael addition reactions:(1) Michael addition reaction between 4,4’-methylenebis(2-methyl cyclohexyl amine) (Laromin C260) and excessive dialkyl maleates（DEF）; (2) The Michael addition reaction of the residual dialkyl maleates of step (1) with polyester polyamine Jeffamine D230. The two-steps method proposed could reduce the reaction time in comparison with the current one step Michael addition reaction method, thus satisfying the industrialized production. New PAE based polyureas were synthesized by reacting the PAE-f chain extender with aliphatic polyisocyanates 4,4’-diisocyanato dicyclohexylmethane (H12MDI) / polyester polyamine Jeffamine D2000 prepolymer at room temperature. FT-IR and GPC were employed to characterize the new PAE prepared, and the morphology, molecular weight distribution and mechanical properties of the prepared PAE based polyureas were investigated by means of FT-IR and GPC. The FT-IR results indicated that the hydrogen bonding degree of amidogen groups in hard segments of the prepared polyureas were high, the length of hydrogen bonding were 0.305nm～0.306nm. The GPC experimental results show that the weight average molecular weight of the PAE-f based polyureas were 4.95×104～6.05×104,Mw/Mn were 1.65～1.97, the molecular weight distribution were relatively narrow. The mechanical properties demonstrated that the tensile strength were 14.7～22.5MPa, Elongation at break were 306～511%, Yang’s modulus were 67～127MPa, Shore A hardness were 64～83. The mechanical properties confirmed that the polyureas based on PAE-f were kinds of elastomeric materials with satisfied flexibility, strength, module and hardness.

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