Research status of the application of petroleum resin compatibility

Abstract: This paper summarizes the latest research status of petroleum resin compatibility in China in recent years, and introduces the research progress of improving the compatibility of petroleum resins and its application.

Keywords: petroleum resin; compatibility; graft

1 Introduction

Compatibility is generally refers to the compatibility of the polymer in the level or the molecular level of the chain, that is, the 2 components in a certain temperature and the proportion of the formation of a stable homogeneous system. Petroleum resin is a by-product of ethylene plant cracking C5, C9, dicyclopentadiene (DCPD) fraction as raw material, through separation and polymerization of solid or viscous liquid polymers. It is a lot of adhesive, hot melt adhesive, such as essential components of viscosity. Due to the lack of polar groups in its molecular structure, the adhesive properties and poor adhesion, and the application of adhesive, coating and other applications are limited, therefore, it needs to be modified. In general, the new functional groups were introduced into the molecular chain of petroleum resin, which was used to improve the compatibility and water solubility of other polymers.

2 ways to improve the compatibility of petroleum resins

In the multiphase system, interphase interfacial area is mainly scattered quality), thickness of the interface layer and interface bonding strength is an important factor in determining the properties of the blends, the control of these factors are inter polymer compatibility. When the two kinds of polymer in contact with each other, first at the interface at mutual moist. Then two phase molecular chain segment by thermal motion and mutual diffusion, and the two kinds of polymers to produce obvious concentration gradient on both sides of the interface, constitute the interphase interface layer and interface layer thickness depends on two kinds of polymer compatibility.

An important way to improve the compatibility of petroleum resin is group interaction is introduced, which has complementary dissimilarity, namely polymer 2 components structure is completely different, but a group of them can interact strongly. As in the non polar groups into blending polar group, may be due to the Hm<0 compatibility significantly improved. The introduction of hydrogen bonds or ionic groups in the polymer chain can enhance the mutual attraction between the two groups.

By adding compatilizer to enhance the polymer blend gold is the compatibility of the studied the most active in recent years, compatibilizer in 2 phase interface and emulsifier role dispersion in polymer blending process. In blends in the join of two groups have the affinity of the three components, namely compatibility agent, can play the role of surfactant, thereby reducing the interfacial tension, the interphase adhesion enhancement, enhance the dispersion degree and mixing uniformity, to improve the stability of the blends [5~7].

Study on the compatibility of petroleum resin 3

Between the petroleum resin and elastomer compatibility is an important factor affect the bonding strength of hot melt adhesive, good compatibility with increasing viscosity resins and elastomers can make colloidal storage modulus decreased, under a certain stress in the colloid and adherends fully bonded; second if not compatible, the colloid storage modulus increased, it will reduce adhesive and adherend adhesive force. Between petroleum resin and elastomer compatibility usually wax cloud point, wax cloud point as the performance index of resin, and the relative molecular mass and its distribution, the resin polarity related, of hot melt adhesive initial tack, tack and peel strength plays an important role in the balance. Petroleum resin wax cloud point is low, between the elastomer and resin, wax system the better compatibility, the higher the initial viscosity of hot melt adhesive, but to less viscous, when petroleum resin wax fog rises, to increase of viscosity.

Gorgeous [8], to S1S/RLPO (styrene isoprene styrene and ethyl acrylate - methyl methacrylate acrylate methyl chloride trimethylamine ethyl ester) blends as the matrix resin of HMPSA (HMPSA), examine the C5 resin on resin matrix compatibility and adhesion properties of the HMPSA. The results show that with the increasing amount of C5 resin, PS (polystyrene) phase of TG is essentially the same, PI (polyisoprene) phase of TG gradually hasten is close to C5 resin that C5 resin and pi phase has good compatibility, and compatibility with the PS is relatively poor.

Liu Xiulan [9] by dynamic mechanical analysis of styrene butadiene styrene block copolymer (SBS) and hydrogen C5 petroleum resin blends compatibility, and to examine the ozone treatment effect of the blends. Results show that when the C5 petroleum resin content is 50 phr, the SBS soft polybutadiene phase of good compatibility, only one glass transition temperature (TG). With the increase of the ozone treatment time, the polarity of C5 petroleum resin was increased, and the compatibility of 120min and SBS was improved after treatment with 60min and C5.

HMPSA (HMPSA) commonly used tackifying resin rosin resin, terpene resin and petroleum resin, 3. There are some differences between the compatibility of the SBS (styrene butadiene / ethylene block copolymer) with the increase of the adhesive resin and thermoplastic elastomer. Wang Yu [10] et al. Study and compare the relationship between the structure and properties of the resin. The research shows that when the softening point of the bonding resin is 100~110, the HMPSA can obtain lower melt viscosity and high peeling strength. The adhesive resin softening point is 100 DEG C, peel strength followed by containing containing terpene resin HMPSA> rosin resin HMPSA> containing petroleum resin HMPSA. When w (increasing viscosity resin) =210% (with respect to the elastomer SBS is concerned), containing petroleum resin HMPSA performance inferior to containing rosin resin, terpene resin) HMPSA; when w (increasing viscosity resin) is equal to or more than 210%, the melt viscosity of HMPSA below 10000mpa,